1. 10 7月, 2013 40 次提交
    • L
      Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux · 2e17c5a9
      Linus Torvalds 提交于
      Pull drm updates from Dave Airlie:
       "Okay this is the big one, I was stalled on the fbdev pull req as I
        stupidly let fbdev guys merge a patch I required to fix a warning with
        some patches I had, they ended up merging the patch from the wrong
        place, but the warning should be fixed.  In future I'll just take the
        patch myself!
      
        Outside drm:
      
        There are some snd changes for the HDMI audio interactions on haswell,
        they've been acked for inclusion via my tree.  This relies on the
        wound/wait tree from Ingo which is already merged.
      
        Major changes:
      
        AMD finally released the dynamic power management code for all their
        GPUs from r600->present day, this is great, off by default for now but
        also a huge amount of code, in fact it is most of this pull request.
      
        Since it landed there has been a lot of community testing and Alex has
        sent a lot of fixes for any bugs found so far.  I suspect radeon might
        now be the biggest kernel driver ever :-P p.s.  radeon.dpm=1 to enable
        dynamic powermanagement for anyone.
      
        New drivers:
      
        Renesas r-car display unit.
      
        Other highlights:
      
         - core: GEM CMA prime support, use new w/w mutexs for TTM
           reservations, cursor hotspot, doc updates
         - dvo chips: chrontel 7010B support
         - i915: Haswell (fbc, ips, vecs, watermarks, audio powerwell),
           Valleyview (enabled by default, rc6), lots of pll reworking, 30bpp
           support (this time for sure)
         - nouveau: async buffer object deletion, context/register init
           updates, kernel vp2 engine support, GF117 support, GK110 accel
           support (with external nvidia ucode), context cleanups.
         - exynos: memory leak fixes, Add S3C64XX SoC series support, device
           tree updates, common clock framework support,
         - qxl: cursor hotspot support, multi-monitor support, suspend/resume
           support
         - mgag200: hw cursor support, g200 mode limiting
         - shmobile: prime support
         - tegra: fixes mostly
      
        I've been banging on this quite a lot due to the size of it, and it
        seems to okay on everything I've tested it on."
      
      * 'drm-next' of git://people.freedesktop.org/~airlied/linux: (811 commits)
        drm/radeon/dpm: implement vblank_too_short callback for si
        drm/radeon/dpm: implement vblank_too_short callback for cayman
        drm/radeon/dpm: implement vblank_too_short callback for btc
        drm/radeon/dpm: implement vblank_too_short callback for evergreen
        drm/radeon/dpm: implement vblank_too_short callback for 7xx
        drm/radeon/dpm: add checks against vblank time
        drm/radeon/dpm: add helper to calculate vblank time
        drm/radeon: remove stray line in old pm code
        drm/radeon/dpm: fix display_gap programming on rv7xx
        drm/nvc0/gr: fix gpc firmware regression
        drm/nouveau: fix minor thinko causing bo moves to not be async on kepler
        drm/radeon/dpm: implement force performance level for TN
        drm/radeon/dpm: implement force performance level for ON/LN
        drm/radeon/dpm: implement force performance level for SI
        drm/radeon/dpm: implement force performance level for cayman
        drm/radeon/dpm: implement force performance levels for 7xx/eg/btc
        drm/radeon/dpm: add infrastructure to force performance levels
        drm/radeon: fix surface setup on r1xx
        drm/radeon: add support for 3d perf states on older asics
        drm/radeon: set default clocks for SI when DPM is disabled
        ...
      2e17c5a9
    • L
      Merge tag 'fbdev-for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/plagnioj/linux-fbdev · 5f097cd2
      Linus Torvalds 提交于
      Pull fbdev update from Jean-Christophe PLAGNIOL-VILLARD:
       "Various fbdev changes for 3.11
         - xilinxfb updates
         - Small cleanups and fixes to multiple drivers
         - OMAP display subsystem bug updates
         - imxfb dt support"
      
      * tag 'fbdev-for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/plagnioj/linux-fbdev: (95 commits)
        video: imxfb: Add DT support
        video: i740fb: Make i740fb_init static
        fb: make fp_get_options name argument const
        video: mmp: fix graphics/video layer enable/mask swap issue
        video: mmp: fix memcpy wrong size for mmp_addr issue
        radeon: use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID_PM)
        aty128fb: use pdev->pm_cap instead of pci_find_capability(..,PCI_CAP_ID_PM)
        video: of_display_timing.h: Declare 'display_timing'
        fbdev: bfin-lq035q1-fb: Use dev_pm_ops
        fbmem: return -EFAULT on copy_to_user() failure
        OMAPDSS: DPI: Fix wrong pixel clock limit
        video: replace strict_strtoul() with kstrtoul()
        uvesafb: Correct/simplify warning message
        fb: fix atyfb unused data warnings
        fb: fix atyfb build warning
        video: imxfb: Make local symbols static
        video: udlfb: Make local symbol static
        video: udlfb: Use NULL instead of 0
        video: smscufx: Use NULL instead of 0
        video: remove unnecessary platform_set_drvdata()
        ...
      5f097cd2
    • L
      Merge branch 'akpm' (updates from Andrew Morton) · a82a729f
      Linus Torvalds 提交于
      Merge second patch-bomb from Andrew Morton:
       - misc fixes
       - audit stuff
       - fanotify/inotify/dnotify things
       - most of the rest of MM.  The new cache shrinker code from Glauber and
         Dave Chinner probably isn't quite stabilized yet.
       - ptrace
       - ipc
       - partitions
       - reboot cleanups
       - add LZ4 decompressor, use it for kernel compression
      
      * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (118 commits)
        lib/scatterlist: error handling in __sg_alloc_table()
        scsi_debug: fix do_device_access() with wrap around range
        crypto: talitos: use sg_pcopy_to_buffer()
        lib/scatterlist: introduce sg_pcopy_from_buffer() and sg_pcopy_to_buffer()
        lib/scatterlist: factor out sg_miter_get_next_page() from sg_miter_next()
        crypto: add lz4 Cryptographic API
        lib: add lz4 compressor module
        arm: add support for LZ4-compressed kernel
        lib: add support for LZ4-compressed kernel
        decompressor: add LZ4 decompressor module
        lib: add weak clz/ctz functions
        reboot: move arch/x86 reboot= handling to generic kernel
        reboot: arm: change reboot_mode to use enum reboot_mode
        reboot: arm: prepare reboot_mode for moving to generic kernel code
        reboot: arm: remove unused restart_mode fields from some arm subarchs
        reboot: unicore32: prepare reboot_mode for moving to generic kernel code
        reboot: x86: prepare reboot_mode for moving to generic kernel code
        reboot: checkpatch.pl the new kernel/reboot.c file
        reboot: move shutdown/reboot related functions to kernel/reboot.c
        reboot: remove -stable friendly PF_THREAD_BOUND define
        ...
      a82a729f
    • L
      Merge tag 'for-linus-3.11-merge-window-part-1' of... · 899dd388
      Linus Torvalds 提交于
      Merge tag 'for-linus-3.11-merge-window-part-1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs
      
      Pull 9p update from Eric Van Hensbergen:
       "Grab bag of little fixes and enhancements:
        - optional security enhancements
        - fix path coverage in MAINTAINERS
        - switch to using most used protocol and transport as default
        - clean up buffer dumps in trace code
      
        Held off on RDMA patches as they need to be cleaned up a bit, but will
        try to get the cleaned, checked, and pushed by mid-week"
      
      * tag 'for-linus-3.11-merge-window-part-1' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
        9p: Add rest of 9p files to MAINTAINERS entry
        9p: trace: use %*ph to dump buffer
        net/9p: Handle error in zero copy request correctly for 9p2000.u
        net/9p: Use virtio transpart as the default transport
        net/9p: Make 9P2000.L the default protocol for 9p file system
      899dd388
    • L
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client · 9a5889ae
      Linus Torvalds 提交于
      Pull Ceph updates from Sage Weil:
       "There is some follow-on RBD cleanup after the last window's code drop,
        a series from Yan fixing multi-mds behavior in cephfs, and then a
        sprinkling of bug fixes all around.  Some warnings, sleeping while
        atomic, a null dereference, and cleanups"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (36 commits)
        libceph: fix invalid unsigned->signed conversion for timespec encoding
        libceph: call r_unsafe_callback when unsafe reply is received
        ceph: fix race between cap issue and revoke
        ceph: fix cap revoke race
        ceph: fix pending vmtruncate race
        ceph: avoid accessing invalid memory
        libceph: Fix NULL pointer dereference in auth client code
        ceph: Reconstruct the func ceph_reserve_caps.
        ceph: Free mdsc if alloc mdsc->mdsmap failed.
        ceph: remove sb_start/end_write in ceph_aio_write.
        ceph: avoid meaningless calling ceph_caps_revoking if sync_mode == WB_SYNC_ALL.
        ceph: fix sleeping function called from invalid context.
        ceph: move inode to proper flushing list when auth MDS changes
        rbd: fix a couple warnings
        ceph: clear migrate seq when MDS restarts
        ceph: check migrate seq before changing auth cap
        ceph: fix race between page writeback and truncate
        ceph: reset iov_len when discarding cap release messages
        ceph: fix cap release race
        libceph: fix truncate size calculation
        ...
      9a5889ae
    • L
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs · e3a0dd98
      Linus Torvalds 提交于
      Pull btrfs update from Chris Mason:
       "These are the usual mixture of bugs, cleanups and performance fixes.
        Miao has some really nice tuning of our crc code as well as our
        transaction commits.
      
        Josef is peeling off more and more problems related to early enospc,
        and has a number of important bug fixes in here too"
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (81 commits)
        Btrfs: wait ordered range before doing direct io
        Btrfs: only do the tree_mod_log_free_eb if this is our last ref
        Btrfs: hold the tree mod lock in __tree_mod_log_rewind
        Btrfs: make backref walking code handle skinny metadata
        Btrfs: fix crash regarding to ulist_add_merge
        Btrfs: fix several potential problems in copy_nocow_pages_for_inode
        Btrfs: cleanup the code of copy_nocow_pages_for_inode()
        Btrfs: fix oops when recovering the file data by scrub function
        Btrfs: make the chunk allocator completely tree lockless
        Btrfs: cleanup orphaned root orphan item
        Btrfs: fix wrong mirror number tuning
        Btrfs: cleanup redundant code in btrfs_submit_direct()
        Btrfs: remove btrfs_sector_sum structure
        Btrfs: check if we can nocow if we don't have data space
        Btrfs: stop using try_to_writeback_inodes_sb_nr to flush delalloc
        Btrfs: use a percpu to keep track of possibly pinned bytes
        Btrfs: check for actual acls rather than just xattrs when caching no acl
        Btrfs: move btrfs_truncate_page to btrfs_cont_expand instead of btrfs_truncate
        Btrfs: optimize reada_for_balance
        Btrfs: optimize read_block_for_search
        ...
      e3a0dd98
    • L
      Merge tag 'for-linus-v3.11-rc1' of git://oss.sgi.com/xfs/xfs · da89bd21
      Linus Torvalds 提交于
      Pull xfs update from Ben Myers:
       "This includes several bugfixes, part of the work for project quotas
        and group quotas to be used together, performance improvements for
        inode creation/deletion, buffer readahead, and bulkstat,
        implementation of the inode change count, an inode create transaction,
        and the removal of a bunch of dead code.
      
        There are also some duplicate commits that you already have from the
        3.10-rc series.
      
         - part of the work to allow project quotas and group quotas to be
           used together
         - inode change count
         - inode create transaction
         - block queue plugging in buffer readahead and bulkstat
         - ordered log vector support
         - removal of dead code in and around xfs_sync_inode_grab,
           xfs_ialloc_get_rec, XFS_MOUNT_RETERR, XFS_ALLOCFREE_LOG_RES,
           XFS_DIROP_LOG_RES, xfs_chash, ctl_table, and
           xfs_growfs_data_private
         - don't keep silent if sunit/swidth can not be changed via mount
         - fix a leak of remote symlink blocks into the filesystem when xattrs
           are used on symlinks
         - fix for fiemap to return FIEMAP_EXTENT_UNKOWN flag on delay extents
         - part of a fix for xfs_fsr
         - disable speculative preallocation with small files
         - performance improvements for inode creates and deletes"
      
      * tag 'for-linus-v3.11-rc1' of git://oss.sgi.com/xfs/xfs: (61 commits)
        xfs: Remove incore use of XFS_OQUOTA_ENFD and XFS_OQUOTA_CHKD
        xfs: Change xfs_dquot_acct to be a 2-dimensional array
        xfs: Code cleanup and removal of some typedef usage
        xfs: Replace macro XFS_DQ_TO_QIP with a function
        xfs: Replace macro XFS_DQUOT_TREE with a function
        xfs: Define a new function xfs_is_quota_inode()
        xfs: implement inode change count
        xfs: Use inode create transaction
        xfs: Inode create item recovery
        xfs: Inode create transaction reservations
        xfs: Inode create log items
        xfs: Introduce an ordered buffer item
        xfs: Introduce ordered log vector support
        xfs: xfs_ifree doesn't need to modify the inode buffer
        xfs: don't do IO when creating an new inode
        xfs: don't use speculative prealloc for small files
        xfs: plug directory buffer readahead
        xfs: add pluging for bulkstat readahead
        xfs: Remove dead function prototype xfs_sync_inode_grab()
        xfs: Remove the left function variable from xfs_ialloc_get_rec()
        ...
      da89bd21
    • J
      libceph: fix invalid unsigned->signed conversion for timespec encoding · 8b8cf891
      Josh Durgin 提交于
      __kernel_time_t is a long, which cannot hold a U32_MAX on 32-bit
      architectures.  Just drop this check as it has limited value.
      
      This fixes a crash like:
      
      [  957.905812] kernel BUG at /srv/autobuild-ceph/gitbuilder.git/build/include/linux/ceph/decode.h:164!
      [  957.914849] Internal error: Oops - BUG: 0 [#1] SMP ARM
      [  957.919978] Modules linked in: rbd libceph libcrc32c ipmi_devintf ipmi_si ipmi_msghandler nfsd nfs_acl auth_rpcgss nfs fscache lockd sunrpc
      [  957.932547] CPU: 1    Tainted: G        W     (3.9.0-ceph-19bb6a83-highbank #1)
      [  957.939881] PC is at ceph_osdc_build_request+0x8c/0x4f8 [libceph]
      [  957.945967] LR is at 0xec520904
      [  957.949103] pc : [<bf13e76c>]    lr : [<ec520904>]    psr: 20000153
      [  957.949103] sp : ec753df8  ip : 00000001  fp : ec53e100
      [  957.960571] r10: ebef25c0  r9 : ec5fa400  r8 : ecbcc000
      [  957.965788] r7 : 00000000  r6 : 00000000  r5 : ffffffff  r4 : 00000020
      [  957.972307] r3 : 51cc8143  r2 : ec520900  r1 : ec753e58  r0 : ec520908
      [  957.978827] Flags: nzCv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment user
      [  957.986039] Control: 10c5387d  Table: 2c59c04a  DAC: 00000015
      [  957.991777] Process rbd (pid: 2138, stack limit = 0xec752238)
      [  957.997514] Stack: (0xec753df8 to 0xec754000)
      [  958.001864] 3de0:                                                       00000001 00000001
      [  958.010032] 3e00: 00000001 bf139744 ecbcc000 ec55a0a0 00000024 00000000 ebef25c0 fffffffe
      [  958.018204] 3e20: ffffffff 00000000 00000000 00000001 ec5fa400 ebef25c0 ec53e100 bf166b68
      [  958.026377] 3e40: 00000000 0000220f fffffffe ffffffff ec753e58 bf13ff24 51cc8143 05b25ed2
      [  958.034548] 3e60: 00000001 00000000 00000000 bf1688d4 00000001 00000000 00000000 00000000
      [  958.042720] 3e80: 00000001 00000060 ec5fa400 ed53d200 ed439600 ed439300 00000001 00000060
      [  958.050888] 3ea0: ec5fa400 ed53d200 00000000 bf16a320 00000000 ec53e100 00000040 ec753eb8
      [  958.059059] 3ec0: ec51df00 ed53d7c0 ed53d200 ed53d7c0 00000000 ed53d7c0 ec5fa400 bf16ed70
      [  958.067230] 3ee0: 00000000 00000060 00000002 ed53d200 00000000 bf16acf4 ed53d7c0 ec752000
      [  958.075402] 3f00: ed980e50 e954f5d8 00000000 00000060 ed53d240 ed53d258 ec753f80 c04f44a8
      [  958.083574] 3f20: edb7910c ec664700 01ade920 c02e4c44 00000060 c016b3dc ec51de40 01adfb84
      [  958.091745] 3f40: 00000060 ec752000 ec753f80 ec752000 00000060 c0108444 00000007 ec51de48
      [  958.099914] 3f60: ed0eb8c0 00000000 00000000 ec51de40 01adfb84 00000001 00000060 c0108858
      [  958.108085] 3f80: 00000000 00000000 51cc8143 00000060 01adfb84 00000007 00000004 c000dd68
      [  958.116257] 3fa0: 00000000 c000dbc0 00000060 01adfb84 00000007 01adfb84 00000060 01adfb80
      [  958.124429] 3fc0: 00000060 01adfb84 00000007 00000004 beded1a8 00000000 01adf2f0 01ade920
      [  958.132599] 3fe0: 00000000 beded180 b6811324 b6811334 800f0010 00000007 2e7f5821 2e7f5c21
      [  958.140815] [<bf13e76c>] (ceph_osdc_build_request+0x8c/0x4f8 [libceph]) from [<bf166b68>] (rbd_osd_req_format_write+0x50/0x7c [rbd])
      [  958.152739] [<bf166b68>] (rbd_osd_req_format_write+0x50/0x7c [rbd]) from [<bf1688d4>] (rbd_dev_header_watch_sync+0xe0/0x204 [rbd])
      [  958.164486] [<bf1688d4>] (rbd_dev_header_watch_sync+0xe0/0x204 [rbd]) from [<bf16a320>] (rbd_dev_image_probe+0x23c/0x850 [rbd])
      [  958.175967] [<bf16a320>] (rbd_dev_image_probe+0x23c/0x850 [rbd]) from [<bf16acf4>] (rbd_add+0x3c0/0x918 [rbd])
      [  958.185975] [<bf16acf4>] (rbd_add+0x3c0/0x918 [rbd]) from [<c02e4c44>] (bus_attr_store+0x20/0x2c)
      [  958.194850] [<c02e4c44>] (bus_attr_store+0x20/0x2c) from [<c016b3dc>] (sysfs_write_file+0x168/0x198)
      [  958.203984] [<c016b3dc>] (sysfs_write_file+0x168/0x198) from [<c0108444>] (vfs_write+0x9c/0x170)
      [  958.212768] [<c0108444>] (vfs_write+0x9c/0x170) from [<c0108858>] (sys_write+0x3c/0x70)
      [  958.220768] [<c0108858>] (sys_write+0x3c/0x70) from [<c000dbc0>] (ret_fast_syscall+0x0/0x30)
      [  958.229199] Code: e59d1058 e5913000 e3530000 ba000114 (e7f001f2)
      
      CC: stable@vger.kernel.org  # 3.4+
      Signed-off-by: NJosh Durgin <josh.durgin@inktank.com>
      Reviewed-by: NSage Weil <sage@inktank.com>
      8b8cf891
    • L
      Merge tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs · be0c5d8c
      Linus Torvalds 提交于
      Pull NFS client updates from Trond Myklebust:
       "Feature highlights include:
         - Add basic client support for NFSv4.2
         - Add basic client support for Labeled NFS (selinux for NFSv4.2)
         - Fix the use of credentials in NFSv4.1 stateful operations, and add
           support for NFSv4.1 state protection.
      
        Bugfix highlights:
         - Fix another NFSv4 open state recovery race
         - Fix an NFSv4.1 back channel session regression
         - Various rpc_pipefs races
         - Fix another issue with NFSv3 auth negotiation
      
        Please note that Labeled NFS does require some additional support from
        the security subsystem.  The relevant changesets have all been
        reviewed and acked by James Morris."
      
      * tag 'nfs-for-3.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (54 commits)
        NFS: Set NFS_CS_MIGRATION for NFSv4 mounts
        NFSv4.1 Refactor nfs4_init_session and nfs4_init_channel_attrs
        nfs: have NFSv3 try server-specified auth flavors in turn
        nfs: have nfs_mount fake up a auth_flavs list when the server didn't provide it
        nfs: move server_authlist into nfs_try_mount_request
        nfs: refactor "need_mount" code out of nfs_try_mount
        SUNRPC: PipeFS MOUNT notification optimization for dying clients
        SUNRPC: split client creation routine into setup and registration
        SUNRPC: fix races on PipeFS UMOUNT notifications
        SUNRPC: fix races on PipeFS MOUNT notifications
        NFSv4.1 use pnfs_device maxcount for the objectlayout gdia_maxcount
        NFSv4.1 use pnfs_device maxcount for the blocklayout gdia_maxcount
        NFSv4.1 Fix gdia_maxcount calculation to fit in ca_maxresponsesize
        NFS: Improve legacy idmapping fallback
        NFSv4.1 end back channel session draining
        NFS: Apply v4.1 capabilities to v4.2
        NFSv4.1: Clean up layout segment comparison helper names
        NFSv4.1: layout segment comparison helpers should take 'const' parameters
        NFSv4: Move the DNS resolver into the NFSv4 module
        rpc_pipefs: only set rpc_dentry_ops if d_op isn't already set
        ...
      be0c5d8c
    • L
      Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs · 1f792dd1
      Linus Torvalds 提交于
      Pull ext3 fix and quota cleanup from Jan Kara:
       "A fix of ext3 error reporting from fsync and a quota cleanup"
      
      * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
        quota: Convert use of typedef ctl_table to struct ctl_table
        ext3: Fix fsync error handling after filesystem abort.
      1f792dd1
    • L
      Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs · c75e2475
      Linus Torvalds 提交于
      Pull third set of VFS updates from Al Viro:
       "Misc stuff all over the place.  There will be one more pile in a
        couple of days"
      
      This is an "evil merge" that also uses the new d_count helper in
      fs/configfs/dir.c, missed by commit 84d08fa8 ("helper for reading
      ->d_count")
      
      * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
        ncpfs: fix error return code in ncp_parse_options()
        locks: move file_lock_list to a set of percpu hlist_heads and convert file_lock_lock to an lglock
        seq_file: add seq_list_*_percpu helpers
        f2fs: fix readdir incorrectness
        mode_t whack-a-mole...
        lustre: kill the pointless wrapper
        helper for reading ->d_count
      c75e2475
    • D
      lib/scatterlist: error handling in __sg_alloc_table() · 27daabd9
      Dan Carpenter 提交于
      I was reviewing code which I suspected might allocate a zero size SG
      table.  That will cause memory corruption.  Also we can't return before
      doing the memset or we could end up using uninitialized memory in the
      cleanup path.
      Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
      Cc: Akinobu Mita <akinobu.mita@gmail.com>
      Cc: Imre Deak <imre.deak@intel.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
      Cc: Maxim Levitsky <maximlevitsky@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      27daabd9
    • A
      scsi_debug: fix do_device_access() with wrap around range · a4517511
      Akinobu Mita 提交于
      do_device_access() is a function that abstracts copying SG list from/to
      ramdisk storage (fake_storep).
      
      It must deal with the ranges exceeding actual fake_storep size, because
      such ranges are valid if virtual_gb is set greater than zero, and they
      should be treated as fake_storep is repeatedly mirrored up to virtual
      size.
      
      Unfortunately, it can't deal with the range which wraps around the end of
      fake_storep.  A wrap around range is copied by two
      sg_copy_{from,to}_buffer() calls, but sg_copy_{from,to}_buffer() can't
      copy from/to in the middle of SG list, therefore the second call can't
      copy correctly.
      
      This fixes it by using sg_pcopy_{from,to}_buffer() that can copy from/to
      the middle of SG list.
      
      This also simplifies the assignment of sdb->resid in
      fill_from_dev_buffer().  Because fill_from_dev_buffer() is now only called
      once per command execution cycle.  So it is not necessary to take care to
      decrease sdb->resid if fill_from_dev_buffer() is called more than once.
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
      Cc: Douglas Gilbert <dgilbert@interlog.com>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: Horia Geanta <horia.geanta@freescale.com>
      Cc: Imre Deak <imre.deak@intel.com>
      Cc: Tejun Heo <tj@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a4517511
    • A
      crypto: talitos: use sg_pcopy_to_buffer() · d0525723
      Akinobu Mita 提交于
      Use sg_pcopy_to_buffer() which is better than the function previously used.
      Because it doesn't do kmap/kunmap for skipped pages.
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
      Cc: Douglas Gilbert <dgilbert@interlog.com>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: Horia Geanta <horia.geanta@freescale.com>
      Cc: Imre Deak <imre.deak@intel.com>
      Cc: Tejun Heo <tj@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      d0525723
    • A
      lib/scatterlist: introduce sg_pcopy_from_buffer() and sg_pcopy_to_buffer() · df642cea
      Akinobu Mita 提交于
      The only difference between sg_pcopy_{from,to}_buffer() and
      sg_copy_{from,to}_buffer() is an additional argument that specifies the
      number of bytes to skip the SG list before copying.
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
      Cc: Douglas Gilbert <dgilbert@interlog.com>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: Horia Geanta <horia.geanta@freescale.com>
      Cc: Imre Deak <imre.deak@intel.com>
      Acked-by: NTejun Heo <tj@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      df642cea
    • A
      lib/scatterlist: factor out sg_miter_get_next_page() from sg_miter_next() · 11052004
      Akinobu Mita 提交于
      This patchset introduces sg_pcopy_from_buffer() and sg_pcopy_to_buffer(),
      which copy data between a linear buffer and an SG list.
      
      The only difference between sg_pcopy_{from,to}_buffer() and
      sg_copy_{from,to}_buffer() is an additional argument that specifies the
      number of bytes to skip the SG list before copying.
      
      The main reason for introducing these functions is to fix a problem in
      scsi_debug module.  And there is a local function in crypto/talitos
      module, which can be replaced by sg_pcopy_to_buffer().
      
      This patch:
      
      sg_miter_get_next_page() is used to proceed page iterator to the next page
      if necessary, and will be used to implement the variants of
      sg_copy_{from,to}_buffer() later.
      Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com>
      Acked-by: NTejun Heo <tj@kernel.org>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Imre Deak <imre.deak@intel.com>
      Cc: Herbert Xu <herbert@gondor.apana.org.au>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
      Cc: Douglas Gilbert <dgilbert@interlog.com>
      Cc: Horia Geanta <horia.geanta@freescale.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      11052004
    • C
      crypto: add lz4 Cryptographic API · 0ea8530d
      Chanho Min 提交于
      Add support for lz4 and lz4hc compression algorithm using the lib/lz4/*
      codebase.
      
      [akpm@linux-foundation.org: fix warnings]
      Signed-off-by: NChanho Min <chanho.min@lge.com>
      Cc: "Darrick J. Wong" <djwong@us.ibm.com>
      Cc: Bob Pearson <rpearson@systemfabricworks.com>
      Cc: Richard Weinberger <richard@nod.at>
      Cc: Herbert Xu <herbert@gondor.hengli.com.au>
      Cc: Yann Collet <yann.collet.73@gmail.com>
      Cc: Kyungsik Lee <kyungsik.lee@lge.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      0ea8530d
    • C
      lib: add lz4 compressor module · c72ac7a1
      Chanho Min 提交于
      This patchset is for supporting LZ4 compression and the crypto API using
      it.
      
      As shown below, the size of data is a little bit bigger but compressing
      speed is faster under the enabled unaligned memory access.  We can use
      lz4 de/compression through crypto API as well.  Also, It will be useful
      for another potential user of lz4 compression.
      
      lz4 Compression Benchmark:
      Compiler: ARM gcc 4.6.4
      ARMv7, 1 GHz based board
         Kernel: linux 3.4
         Uncompressed data Size: 101 MB
               Compressed Size  compression Speed
         LZO   72.1MB		  32.1MB/s, 33.0MB/s(UA)
         LZ4   75.1MB		  30.4MB/s, 35.9MB/s(UA)
         LZ4HC 59.8MB		   2.4MB/s,  2.5MB/s(UA)
      - UA: Unaligned memory Access support
      - Latest patch set for LZO applied
      
      This patch:
      
      Add support for LZ4 compression in the Linux Kernel.  LZ4 Compression APIs
      for kernel are based on LZ4 implementation by Yann Collet and were changed
      for kernel coding style.
      
      LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
      LZ4 source repository : http://code.google.com/p/lz4/
      svn revision : r90
      
      Two APIs are added:
      
      lz4_compress() support basic lz4 compression whereas lz4hc_compress()
      support high compression or CPU performance get lower but compression
      ratio get higher.  Also, we require the pre-allocated working memory with
      the defined size and destination buffer must be allocated with the size of
      lz4_compressbound.
      
      [akpm@linux-foundation.org: make lz4_compresshcctx() static]
      Signed-off-by: NChanho Min <chanho.min@lge.com>
      Cc: "Darrick J. Wong" <djwong@us.ibm.com>
      Cc: Bob Pearson <rpearson@systemfabricworks.com>
      Cc: Richard Weinberger <richard@nod.at>
      Cc: Herbert Xu <herbert@gondor.hengli.com.au>
      Cc: Yann Collet <yann.collet.73@gmail.com>
      Cc: Kyungsik Lee <kyungsik.lee@lge.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      c72ac7a1
    • K
      arm: add support for LZ4-compressed kernel · f9b493ac
      Kyungsik Lee 提交于
      Integrates the LZ4 decompression code to the arm pre-boot code.
      Signed-off-by: NKyungsik Lee <kyungsik.lee@lge.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Florian Fainelli <florian@openwrt.org>
      Cc: Yann Collet <yann.collet.73@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f9b493ac
    • K
      lib: add support for LZ4-compressed kernel · e76e1fdf
      Kyungsik Lee 提交于
      Add support for extracting LZ4-compressed kernel images, as well as
      LZ4-compressed ramdisk images in the kernel boot process.
      Signed-off-by: NKyungsik Lee <kyungsik.lee@lge.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Florian Fainelli <florian@openwrt.org>
      Cc: Yann Collet <yann.collet.73@gmail.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      e76e1fdf
    • K
      decompressor: add LZ4 decompressor module · cffb78b0
      Kyungsik Lee 提交于
      Add support for LZ4 decompression in the Linux Kernel.  LZ4 Decompression
      APIs for kernel are based on LZ4 implementation by Yann Collet.
      
      Benchmark Results(PATCH v3)
      Compiler: Linaro ARM gcc 4.6.2
      
      1. ARMv7, 1.5GHz based board
         Kernel: linux 3.4
         Uncompressed Kernel Size: 14MB
              Compressed Size  Decompression Speed
         LZO  6.7MB            20.1MB/s, 25.2MB/s(UA)
         LZ4  7.3MB            29.1MB/s, 45.6MB/s(UA)
      
      2. ARMv7, 1.7GHz based board
         Kernel: linux 3.7
         Uncompressed Kernel Size: 14MB
              Compressed Size  Decompression Speed
         LZO  6.0MB            34.1MB/s, 52.2MB/s(UA)
         LZ4  6.5MB            86.7MB/s
      - UA: Unaligned memory Access support
      - Latest patch set for LZO applied
      
      This patch set is for adding support for LZ4-compressed Kernel.  LZ4 is a
      very fast lossless compression algorithm and it also features an extremely
      fast decoder [1].
      
      But we have five of decompressors already and one question which does
      arise, however, is that of where do we stop adding new ones?  This issue
      had been discussed and came to the conclusion [2].
      
      Russell King said that we should have:
      
       - one decompressor which is the fastest
       - one decompressor for the highest compression ratio
       - one popular decompressor (eg conventional gzip)
      
      If we have a replacement one for one of these, then it should do exactly
      that: replace it.
      
      The benchmark shows that an 8% increase in image size vs a 66% increase
      in decompression speed compared to LZO(which has been known as the
      fastest decompressor in the Kernel).  Therefore the "fast but may not be
      small" compression title has clearly been taken by LZ4 [3].
      
      [1] http://code.google.com/p/lz4/
      [2] http://thread.gmane.org/gmane.linux.kbuild.devel/9157
      [3] http://thread.gmane.org/gmane.linux.kbuild.devel/9347
      
      LZ4 homepage: http://fastcompression.blogspot.com/p/lz4.html
      LZ4 source repository: http://code.google.com/p/lz4/Signed-off-by: NKyungsik Lee <kyungsik.lee@lge.com>
      Signed-off-by: NYann Collet <yann.collet.73@gmail.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Borislav Petkov <bp@alien8.de>
      Cc: Florian Fainelli <florian@openwrt.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      cffb78b0
    • C
      lib: add weak clz/ctz functions · 4df87bb7
      Chanho Min 提交于
      Some architectures need __c[lt]z[sd]i2() for __builtin_c[lt]z[ll] and
      that causes a build failure.  They can be implemented using the
      fls()/__ffs() and overridden by linking arch-specific versions may not
      be implemented yet.
      
      This is required by "lib: add lz4 compressor module".
      
      Reference: https://lkml.org/lkml/2013/4/18/603Signed-off-by: NChanho Min <chanho.min@lge.com>
      Reported-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      Cc: "Darrick J. Wong" <djwong@us.ibm.com>
      Cc: Bob Pearson <rpearson@systemfabricworks.com>
      Cc: Richard Weinberger <richard@nod.at>
      Cc: Herbert Xu <herbert@gondor.hengli.com.au>
      Cc: Yann Collet <yann.collet.73@gmail.com>
      Cc: Kyungsik Lee <kyungsik.lee@lge.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      4df87bb7
    • R
      reboot: move arch/x86 reboot= handling to generic kernel · 1b3a5d02
      Robin Holt 提交于
      Merge together the unicore32, arm, and x86 reboot= command line
      parameter handling.
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Acked-by: NIngo Molnar <mingo@kernel.org>
      Acked-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
      Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      1b3a5d02
    • R
      reboot: arm: change reboot_mode to use enum reboot_mode · 7b6d864b
      Robin Holt 提交于
      Preparing to move the parsing of reboot= to generic kernel code forces
      the change in reboot_mode handling to use the enum.
      
      [akpm@linux-foundation.org: fix arch/arm/mach-socfpga/socfpga.c]
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      7b6d864b
    • R
      reboot: arm: prepare reboot_mode for moving to generic kernel code · 16d6d5b0
      Robin Holt 提交于
      Prepare for the moving the parsing of reboot= to the generic kernel code
      by making reboot_mode into a more generic form.
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      16d6d5b0
    • R
      reboot: arm: remove unused restart_mode fields from some arm subarchs · 58591942
      Robin Holt 提交于
      These restart_mode fields are not used at all.  Remove them to make
      moving the reboot= cmdline options to the general kernel easier.
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      58591942
    • R
      reboot: unicore32: prepare reboot_mode for moving to generic kernel code · c97a7008
      Robin Holt 提交于
      Prepare for the moving the parsing of reboot= to the generic kernel code
      by making reboot_mode into a more generic form.
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Acked-by: NGuan Xuetao <gxt@mprc.pku.edu.cn>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      c97a7008
    • R
      reboot: x86: prepare reboot_mode for moving to generic kernel code · edf2b139
      Robin Holt 提交于
      Prepare for the moving the parsing of reboot= to the generic kernel code
      by making reboot_mode into a more generic form.
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Miguel Boton <mboton.lkml@gmail.com>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Acked-by: NIngo Molnar <mingo@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      edf2b139
    • R
      reboot: checkpatch.pl the new kernel/reboot.c file · 972ee83d
      Robin Holt 提交于
      Get the new file to pass scripts/checkpatch.pl
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      972ee83d
    • R
      reboot: move shutdown/reboot related functions to kernel/reboot.c · 15d94b82
      Robin Holt 提交于
      This patch is preparatory.  It moves reboot related syscall, etc
      functions from kernel/sys.c to kernel/reboot.c.
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      15d94b82
    • R
      reboot: remove -stable friendly PF_THREAD_BOUND define · 0efbee70
      Robin Holt 提交于
      Remove the prior patch's #define for easier backporting to the stable
      releases.
      Signed-off-by: NRobin Holt <holt@sgi.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Russ Anderson <rja@sgi.com>
      Cc: Robin Holt <holt@sgi.com>
      Cc: Russell King <rmk+kernel@arm.linux.org.uk>
      Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
      Cc: Ingo Molnar <mingo@kernel.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      0efbee70
    • P
      partitions/msdos: enumerate also AIX LVM partitions · f8f06603
      Philippe De Muyter 提交于
      Graft AIX partitions enumeration into partitions/msdos.c
      
      There is already a AIX disks detection logic in msdos.c.  When an AIX disk
      has been found, and if configured to, call the aix partitions recognizer.
      This avoids removal of AIX disks protection from msdos.c, avoids code
      duplication, and ensures that AIX partitions enumeration is called before
      plain msdos partitions enumeration.
      Signed-off-by: NPhilippe De Muyter <phdm@macqel.be>
      Cc: Karel Zak <kzak@redhat.com>
      Cc: Jens Axboe <axboe@kernel.dk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f8f06603
    • P
      partitions: add aix lvm partition support files · 6ceea22b
      Philippe De Muyter 提交于
      Add partitions/aix.h and partitions/aix.c.
      
      AIX LVM permits to make "logical volumes" which are made of multiple
      slices of multiple disks.  The new code allows only access to the
      "logical volumes" which are made of one slice on the probed disk, a
      slice being a contiguous disk area.  The code also detects "logical
      volumes" made of multiple slices on the probed disk, but can not
      describe them to the partition layer, because the partition layer
      generic code does not support that.  When such non-contiguous "logical
      volumes" are detected, a diagnostic message is printed.
      
      [akpm@linux-foundation.org: coding-style fixes]
      Signed-off-by: NPhilippe De Muyter <phdm@macqel.be>
      Cc: Karel Zak <kzak@redhat.com>
      Cc: Jens Axboe <axboe@kernel.dk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      6ceea22b
    • P
      partitions/msdos.c: end-of-line whitespace and semicolon cleanup · 1d04f3c6
      Philippe De Muyter 提交于
      Signed-off-by: NPhilippe De Muyter <phdm@macqel.be>
      Cc: Karel Zak <kzak@redhat.com>
      Cc: Jens Axboe <axboe@kernel.dk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      1d04f3c6
    • D
      mwave: fix info leak in mwave_ioctl() · 026dadad
      Dan Carpenter 提交于
      Smatch complains that on 64 bit systems, there is a hole in the
      MW_ABILITIES struct between ->component_count and ->component_list[].
      It leaks stack information from the mwave_ioctl() function.
      
      I've added a memset() to initialize the struct to zero.
      Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
      Cc: Greg KH <greg@kroah.com>
      Cc: Jiri Kosina <jkosina@suse.cz>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      026dadad
    • M
      ipc/sem.c: rename try_atomic_semop() to perform_atomic_semop(), docu update · 758a6ba3
      Manfred Spraul 提交于
      Cleanup: Some minor points that I noticed while writing the previous
      patches
      
      1) The name try_atomic_semop() is misleading: The function performs the
         operation (if it is possible).
      
      2) Some documentation updates.
      
      No real code change, a rename and documentation changes.
      Signed-off-by: NManfred Spraul <manfred@colorfullife.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      758a6ba3
    • M
      ipc/sem.c: replace shared sem_otime with per-semaphore value · d12e1e50
      Manfred Spraul 提交于
      sem_otime contains the time of the last semaphore operation that
      completed successfully.  Every operation updates this value, thus access
      from multiple cpus can cause thrashing.
      
      Therefore the patch replaces the variable with a per-semaphore variable.
      The per-array sem_otime is only calculated when required.
      
      No performance improvement on a single-socket i3 - only important for
      larger systems.
      Signed-off-by: NManfred Spraul <manfred@colorfullife.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      d12e1e50
    • M
      ipc/sem.c: always use only one queue for alter operations · f269f40a
      Manfred Spraul 提交于
      There are two places that can contain alter operations:
       - the global queue: sma->pending_alter
       - the per-semaphore queues: sma->sem_base[].pending_alter.
      
      Since one of the queues must be processed first, this causes an odd
      priorization of the wakeups: complex operations have priority over
      simple ops.
      
      The patch restores the behavior of linux <=3.0.9: The longest waiting
      operation has the highest priority.
      
      This is done by using only one queue:
       - if there are complex ops, then sma->pending_alter is used.
       - otherwise, the per-semaphore queues are used.
      
      As a side effect, do_smart_update_queue() becomes much simpler: no more
      goto logic.
      Signed-off-by: NManfred Spraul <manfred@colorfullife.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f269f40a
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      ipc/sem: separate wait-for-zero and alter tasks into seperate queues · 1a82e9e1
      Manfred Spraul 提交于
      Introduce separate queues for operations that do not modify the
      semaphore values.  Advantages:
      
       - Simpler logic in check_restart().
       - Faster update_queue(): Right now, all wait-for-zero operations are
         always tested, even if the semaphore value is not 0.
       - wait-for-zero gets again priority, as in linux <=3.0.9
      Signed-off-by: NManfred Spraul <manfred@colorfullife.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      1a82e9e1
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      ipc/sem.c: cacheline align the semaphore structures · f5c936c0
      Manfred Spraul 提交于
      As now each semaphore has its own spinlock and parallel operations are
      possible, give each semaphore its own cacheline.
      
      On a i3 laptop, this gives up to 28% better performance:
      
        #semscale 10 | grep "interleave 2"
        - before:
        Cpus 1, interleave 2 delay 0: 36109234 in 10 secs
        Cpus 2, interleave 2 delay 0: 55276317 in 10 secs
        Cpus 3, interleave 2 delay 0: 62411025 in 10 secs
        Cpus 4, interleave 2 delay 0: 81963928 in 10 secs
      
        -after:
        Cpus 1, interleave 2 delay 0: 35527306 in 10 secs
        Cpus 2, interleave 2 delay 0: 70922909 in 10 secs <<< + 28%
        Cpus 3, interleave 2 delay 0: 80518538 in 10 secs
        Cpus 4, interleave 2 delay 0: 89115148 in 10 secs <<< + 8.7%
      
      i3, with 2 cores and with hyperthreading enabled.  Interleave 2 in order
      use first the full cores.  HT partially hides the delay from cacheline
      trashing, thus the improvement is "only" 8.7% if 4 threads are running.
      Signed-off-by: NManfred Spraul <manfred@colorfullife.com>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f5c936c0