1. 27 1月, 2009 21 次提交
  2. 26 1月, 2009 10 次提交
    • M
      fuse: fix poll notify · f6d47a17
      Miklos Szeredi 提交于
      Move fuse_copy_finish() to before calling fuse_notify_poll_wakeup().
      This is not a big issue because fuse_notify_poll_wakeup() should be
      atomic, but it's cleaner this way, and later uses of notification will
      need to be able to finish the copying before performing some actions.
      Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
      f6d47a17
    • M
      fuse: destroy bdi on umount · 26c36791
      Miklos Szeredi 提交于
      If a fuse filesystem is unmounted but the device file descriptor
      remains open and a new mount reuses the old device number, then the
      mount fails with EEXIST and the following warning is printed in the
      kernel log:
      
        WARNING: at fs/sysfs/dir.c:462 sysfs_add_one+0x35/0x3d()
        sysfs: duplicate filename '0:15' can not be created
      
      The cause is that the bdi belonging to the fuse filesystem was
      destoryed only after the device file was released.  Fix this by
      calling bdi_destroy() from fuse_put_super() instead.
      Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
      CC: stable@kernel.org
      26c36791
    • M
      fuse: fuse_fill_super error handling cleanup · c2b8f006
      Miklos Szeredi 提交于
      Clean up error handling for the whole of fuse_fill_super() function.
      Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
      c2b8f006
    • M
      fuse: fix missing fput on error · 3ddf1e7f
      Miklos Szeredi 提交于
      Fix the leaking file reference if allocation or initialization of
      fuse_conn failed.
      Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
      CC: stable@kernel.org
      3ddf1e7f
    • D
      fuse: fix NULL deref in fuse_file_alloc() · bb875b38
      Dan Carpenter 提交于
      ff is set to NULL and then dereferenced on line 65.  Compile tested only.
      Signed-off-by: NDan Carpenter <error27@gmail.com>
      Signed-off-by: NMiklos Szeredi <mszeredi@suse.cz>
      CC: stable@kernel.org
      bb875b38
    • I
      xen: unitialised return value in xenbus_write_transaction · e88a0faa
      Ian Campbell 提交于
      The return value of xenbus_write_transaction can be uninitialised in
      the success case leading to the userspace xenstore utilities failing.
      Signed-off-by: NIan Campbell <ian.campbell@citrix.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      e88a0faa
    • R
      x86: fix section mismatch warning · 659d2618
      Rakib Mullick 提交于
      Here function vmi_activate calls a init function activate_vmi , which
      causes the following section mismatch warnings:
      
        LD      arch/x86/kernel/built-in.o
      WARNING: arch/x86/kernel/built-in.o(.text+0x13ba9): Section mismatch
      in reference from the function vmi_activate() to the function
      .init.text:vmi_time_init()
      The function vmi_activate() references
      the function __init vmi_time_init().
      This is often because vmi_activate lacks a __init
      annotation or the annotation of vmi_time_init is wrong.
      
      WARNING: arch/x86/kernel/built-in.o(.text+0x13bd1): Section mismatch
      in reference from the function vmi_activate() to the function
      .devinit.text:vmi_time_bsp_init()
      The function vmi_activate() references
      the function __devinit vmi_time_bsp_init().
      This is often because vmi_activate lacks a __devinit
      annotation or the annotation of vmi_time_bsp_init is wrong.
      
      WARNING: arch/x86/kernel/built-in.o(.text+0x13bdb): Section mismatch
      in reference from the function vmi_activate() to the function
      .devinit.text:vmi_time_ap_init()
      The function vmi_activate() references
      the function __devinit vmi_time_ap_init().
      This is often because vmi_activate lacks a __devinit
      annotation or the annotation of vmi_time_ap_init is wrong.
      
      Fix it by marking vmi_activate() as __init too.
      Signed-off-by: NRakib Mullick <rakib.mullick@gmail.com>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      659d2618
    • I
      x86: unmask CPUID levels on Intel CPUs, fix · 99fb4d34
      Ingo Molnar 提交于
      Impact: fix boot hang on pre-model-15 Intel CPUs
      
      rdmsrl_safe() does not work in very early bootup code yet, because we
      dont have the pagefault handler installed yet so exception section
      does not get parsed. rdmsr_safe() will just crash and hang the bootup.
      
      So limit the MSR_IA32_MISC_ENABLE MSR read to those CPU types that
      support it.
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      99fb4d34
    • E
      x86: work around PAGE_KERNEL_WC not getting WC in iomap_atomic_prot_pfn. · ef5fa0ab
      Eric Anholt 提交于
      In the absence of PAT, PAGE_KERNEL_WC ends up mapping to a memory type that
      gets UC behavior even in the presence of a WC MTRR covering the area in
      question.  By swapping to PAGE_KERNEL_UC_MINUS, we can get the actual
      behavior the caller wanted (WC if you can manage it, UC otherwise).
      
      This recovers the 40% performance improvement of using WC in the DRM
      to upload vertex data.
      Signed-off-by: NEric Anholt <eric@anholt.net>
      Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      ef5fa0ab
    • P
      power_supply: pda_power: Don't request shared IRQs w/ IRQF_DISABLED · 74194cc7
      Philipp Zabel 提交于
      IRQF_DISABLED is not guaranteed for shared IRQs. I think power_changed_isr
      doesn't need it anyway, as it only fires a timer.
      This patch enables IRQF_SAMPLE_RANDOM instead.
      Signed-off-by: NPhilipp Zabel <philipp.zabel@gmail.com>
      Signed-off-by: NAnton Vorontsov <cbouatmailru@gmail.com>
      74194cc7
  3. 25 1月, 2009 1 次提交
    • I
      x86: use standard PIT frequency · e1b4d114
      Ingo Molnar 提交于
      the RDC and ELAN platforms use slighly different PIT clocks, resulting in
      a timex.h hack that changes PIT_TICK_RATE during build time. But if a
      tester enables any of these platform support .config options, the PIT
      will be miscalibrated on standard PC platforms.
      
      So use one frequency - in a subsequent patch we'll add a quirk to allow
      x86 platforms to define different PIT frequencies.
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      e1b4d114
  4. 24 1月, 2009 3 次提交
    • I
      xen: handle highmem pages correctly when shrinking a domain · ff4ce8c3
      Ian Campbell 提交于
      Commit 1058a75f ("xen: actually release
      memory when shrinking domain") causes a crash if the page being released
      is a highmem page.
      
      If a page is highmem then there is no need to unmap it.
      Signed-off-by: NIan Campbell <ian.campbell@citrix.com>
      Acked-by: NJeremy Fitzhardinge <jeremy@goop.org>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      ff4ce8c3
    • P
      x86, mm: fix pte_free() · 42ef73fe
      Peter Zijlstra 提交于
      On -rt we were seeing spurious bad page states like:
      
      Bad page state in process 'firefox'
      page:c1bc2380 flags:0x40000000 mapping:c1bc2390 mapcount:0 count:0
      Trying to fix it up, but a reboot is needed
      Backtrace:
      Pid: 503, comm: firefox Not tainted 2.6.26.8-rt13 #3
      [<c043d0f3>] ? printk+0x14/0x19
      [<c0272d4e>] bad_page+0x4e/0x79
      [<c0273831>] free_hot_cold_page+0x5b/0x1d3
      [<c02739f6>] free_hot_page+0xf/0x11
      [<c0273a18>] __free_pages+0x20/0x2b
      [<c027d170>] __pte_alloc+0x87/0x91
      [<c027d25e>] handle_mm_fault+0xe4/0x733
      [<c043f680>] ? rt_mutex_down_read_trylock+0x57/0x63
      [<c043f680>] ? rt_mutex_down_read_trylock+0x57/0x63
      [<c0218875>] do_page_fault+0x36f/0x88a
      
      This is the case where a concurrent fault already installed the PTE and
      we get to free the newly allocated one.
      
      This is due to pgtable_page_ctor() doing the spin_lock_init(&page->ptl)
      which is overlaid with the {private, mapping} struct.
      
      union {
          struct {
              unsigned long private;
              struct address_space *mapping;
          };
          spinlock_t ptl;
          struct kmem_cache *slab;
          struct page *first_page;
      };
      
      Normally the spinlock is small enough to not stomp on page->mapping, but
      PREEMPT_RT=y has huge 'spin'locks.
      
      But lockdep kernels should also be able to trigger this splat, as the
      lock tracking code grows the spinlock to cover page->mapping.
      
      The obvious fix is calling pgtable_page_dtor() like the regular pte free
      path __pte_free_tlb() does.
      
      It seems all architectures except x86 and nm10300 already do this, and
      nm10300 doesn't seem to use pgtable_page_ctor(), which suggests it
      doesn't do SMP or simply doesnt do MMU at all or something.
      Signed-off-by: NPeter Zijlstra <a.p.zijlsta@chello.nl>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      Cc: <stable@kernel.org>
      42ef73fe
    • T
      Merge branch 'fix/asoc' into for-linus · 0f0779b1
      Takashi Iwai 提交于
      0f0779b1
  5. 23 1月, 2009 5 次提交
    • M
      [S390] Add missing compat system call wrappers. · e34a6280
      Michael Holzheu 提交于
      Add wrapper functions for the following compat system calls:
      * readahead
      * sendfile64
      * tkill
      * tgkill
      * keyctl
      This ensures that the high order bits of the parameter registers are correctly
      sign extended.
      Signed-off-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com>
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      e34a6280
    • H
      [S390] etr/stp: fix possible deadlock · 179cb81a
      Heiko Carstens 提交于
      Precreate stop_machine threads in case the machine supports ETR/STP.
      Otherwise we might deadlock if a time sync operation gets scheduled
      and the creation of stop_machine threads would cause disk I/O.
      This is just the minimal fix.
      The real fix would be to only precreate stop_machine threads if
      ETR/STP is actually used. But that would be a rather large and
      complicated patch.
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      179cb81a
    • H
      [S390] cputime: fix lowcore initialization on cpu hotplug · f9a2f797
      Heiko Carstens 提交于
      On (initial) cpu hotplug the lowcore values for user_timer and
      system_timer don't get initialized like they would get on each
      process schedule.
      On initial start of secondary cpus this leads to the situation
      where per thread user/system_timer values are larger than the
      corresponding contents of the lowcore. When later calculating
      time spent in user/system context the result can be negative.
      
      So for cpu hotplug we should manually initialize lowcore values.
      
      Fixes this bug:
      
      Kernel BUG at 000ec080 [verbose debug info unavailable]
      fixpoint divide exception: 0009 [#1] PREEMPT SMP
      Modules linked in:
      CPU: 10 Not tainted 2.6.28 #4
      Process sysctl (pid: 975, task: 3fa752e0, ksp: 3fbebca0)
      Krnl PSW : 070c1000 800ec080 (show_stat+0x390/0x5fc)
                 R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:1 PM:0
      Krnl GPRS: 7fffffff fefc7ce5 3faec080 003879ae
                 00000001 01388000 7fffffff 01388000
                 00000000 00000000 0049ad50 3fbebcf8
                 01388000 002f51a8 800ec1fe 3fbebcf8
      Krnl Code: 800ec076: 9001b188           stm     %r0,%r1,392(%r11)
                 800ec07a: 9801b0c0           lm      %r0,%r1,192(%r11)
                 800ec07e: 1d05               dr      %r0,%r5
                >800ec080: 9001b0c0           stm     %r0,%r1,192(%r11)
                 800ec084: 5860b0c4           l       %r6,196(%r11)
                 800ec088: 1806               lr      %r0,%r6
                 800ec08a: 8c800001           srdl    %r8,1
                 800ec08e: 1d87               dr      %r8,%r7
      Call Trace:
      ([<00000000000ec1ee>] show_stat+0x4fe/0x5fc)
       [<00000000000c13e8>] seq_read+0xc4/0x3ac
       [<00000000000e4796>] proc_reg_read+0x6e/0x9c
       [<00000000000a6a44>] vfs_read+0x78/0x100
       [<00000000000a6ba8>] sys_read+0x40/0x80
       [<00000000000234a8>] sysc_do_restart+0x1a/0x1e
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      f9a2f797
    • M
      [S390] fix compat sigaltstack syscall table entry · e9a4e9d5
      Michael Holzheu 提交于
      When 31 bit user space programs call sigaltstack on a 64 bit Linux
      OS, the system call returns -1 with errno=EFAULT. The 31 bit pointer passed
      to the system call is extended to 64 bit, but the high order bits are not
      set to zero. The kernel detects the invalid user space pointer and
      returns -EFAULT. To solve the problem, sys32_sigaltstack_wrapper()
      instead of sys32_sigaltstack() has to be called. The wrapper function sets
      the high order bits to zero.
      Signed-off-by: NMichael Holzheu <holzheu@linux.vnet.ibm.com>
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      e9a4e9d5
    • H
      [S390] personality: fix personality loss on execve · 03e4c49f
      Heiko Carstens 提交于
      Use the personality() macro to mask out all bits that are not
      relevant for the personality type.
      The personality field contains bits for other things as well,
      so without masking out the not relevalent bits the comparison
      won't do what is expected.
      Reported-by: NAndreas Krebbel <krebbel@linux.vnet.ibm.com>
      Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
      03e4c49f