This adds hugetlbfs support on System z, using both hardware large page
support if available and software large page emulation on older hardware.
Shared (large) page tables are implemented in software emulation mode,
by using page->index of the first tail page from a compound large page
to store page table information.
Signed-off-by: NGerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

From: Heiko Carstens <heiko.carstens@de.ibm.com>
From: Carsten Otte <cotte@de.ibm.com>

This lets us use defines for the magic bits in machine flags instead
of using plain numbers all over the place.
In addition on newer machines features/facilities are indicated by the
result of the stfl instruction. So we use these bits instead of trying
to execute new instructions and check wether we get an exception or
not.
Also the mvpg instruction is always available when in zArch mode,
whereas the idte instruction is only available in zArch mode. This
results in some minor optimizations.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NCarsten Otte <cotte@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Always use clear_table to initialise page tables. The overlapping
memcpy is just a leftover of a previous version that wasn't fully
converted to clear_table.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/lib/uaccess_mvcos.c:166:
 warning: 'strnlen_user_mvcos' defined but not used
arch/s390/lib/uaccess_mvcos.c:186:
 warning: 'strncpy_from_user_mvcos' defined but not used
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

When we get a notification that cpu topology changed, we schedule a
work struct which just calls arch_reinit_sched_domains. This function
in turn calls get_online_cpus() which results int the lockdep warning
below.

After all it turnded out that it's not legal to call get_online_cpus()
from the context of a multi-threaded work queue.
It could deadlock this way:

process 0 (events/cpu-x):
-> run_workqueue
-> removes my work_struct from the work queue
-> calls work_struct->fn
-> get_online_cpus()
-> locks on cpu_hotplug.lock since process 1 below is doing cpu hotplug

process 1:
-> cpu_down (for cpu-x)
-> cpu_hotplug_begin (holds cpu_hotplug.lock now)
-> cpu-x dead
-> notifier_call_chain with CPU_DEAD
-> cleanup_workqueue_thread
-> flush_cpu_workqueue (succeeds)
-> kthread_stop for events/cpu-x
  -> now kthread_stop waits for my work_struct to complete from within
     process 0. -> dead.

A single threaded workqueue wouldn't have such problems, however there is
no such common queue available and it's not worth to create one for the
very rare calls to arch_reinit_sched_domains.

So we just create a kernel thread from our work struct which calls
arch_reinit_sched_domains and are done with it.

Thanks to Oleg Nesterov and Peter Zijlstra for helping me figuring out
that this isn't a false positive lockdep warning:

=======================================================
[ INFO: possible circular locking dependency detected ]
2.6.25-03562-g3dc50637-dirty #12
-------------------------------------------------------
events/3/14 is trying to acquire lock:
 (&cpu_hotplug.lock){--..}, at: [<0000000000076094>] get_online_cpus+0x50/0x78

but task is already holding lock:
 (topology_work){--..}, at: [<0000000000059cde>] run_workqueue+0x106/0x278

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #2 (topology_work){--..}:
       [<000000000006fc74>] __lock_acquire+0x1010/0x111c
       [<000000000006fe40>] lock_acquire+0xc0/0xf8
       [<0000000000059d48>] run_workqueue+0x170/0x278
       [<0000000000059edc>] worker_thread+0x8c/0xf0
       [<000000000005f5bc>] kthread+0x68/0xa0
       [<000000000001a33e>] kernel_thread_starter+0x6/0xc
       [<000000000001a338>] kernel_thread_starter+0x0/0xc

-> #1 (events){--..}:
       [<000000000006fc74>] __lock_acquire+0x1010/0x111c
       [<000000000006fe40>] lock_acquire+0xc0/0xf8
       [<000000000005a23c>] cleanup_workqueue_thread+0x60/0xa8
       [<00000000003b2ab8>] workqueue_cpu_callback+0xbc/0x170
       [<00000000003bba80>] notifier_call_chain+0x5c/0xa4
       [<00000000000655a2>] __raw_notifier_call_chain+0x26/0x38
       [<00000000000655e2>] raw_notifier_call_chain+0x2e/0x40
       [<0000000000075e00>] cpu_down+0x228/0x31c
       [<00000000003b1dd8>] store_online+0x64/0xb8
       [<00000000001e7128>] sysdev_store+0x48/0x58
       [<0000000000121cd2>] sysfs_write_file+0x126/0x1c0
       [<00000000000c1944>] vfs_write+0xb0/0x15c
       [<00000000000c20e6>] sys_write+0x56/0x88
       [<0000000000027a68>] sys32_write+0x34/0x4c
       [<0000000000023f70>] sysc_noemu+0x10/0x16
       [<0000000077f3f186>] 0x77f3f186

-> #0 (&cpu_hotplug.lock){--..}:
       [<000000000006fa84>] __lock_acquire+0xe20/0x111c
       [<000000000006fe40>] lock_acquire+0xc0/0xf8
       [<00000000003b701c>] mutex_lock_nested+0xd0/0x364
       [<0000000000076094>] get_online_cpus+0x50/0x78
       [<000000000003a03e>] arch_reinit_sched_domains+0x26/0x58
       [<000000000002700e>] topology_work_fn+0x26/0x34
       [<0000000000059d4e>] run_workqueue+0x176/0x278
       [<0000000000059edc>] worker_thread+0x8c/0xf0
       [<000000000005f5bc>] kthread+0x68/0xa0
       [<000000000001a33e>] kernel_thread_starter+0x6/0xc
       [<000000000001a338>] kernel_thread_starter+0x0/0xc

other info that might help us debug this:

2 locks held by events/3/14:
 #0:  (events){--..}, at: [<0000000000059cde>] run_workqueue+0x106/0x278
 #1:  (topology_work){--..}, at: [<0000000000059cde>] run_workqueue+0x106/0x278

stack backtrace:
CPU: 3 Not tainted 2.6.25-03562-g3dc50637-dirty #12
Process events/3 (pid: 14, task: 000000002fb04038, ksp: 000000002fb0bd70)
0400000000000000 000000002fb0ba40 0000000000000002 0000000000000000
       000000002fb0bae0 000000002fb0ba58 000000002fb0ba58 0000000000016488
       0000000000000000 000000002fb0bd70 0000000000000000 0000000000000000
       000000002fb0ba40 000000000000000c 000000002fb0ba40 000000002fb0bab0
       00000000003c99e0 0000000000016488 000000002fb0ba40 000000002fb0ba90
Call Trace:
([<00000000000163fc>] show_trace+0x138/0x158)
 [<00000000000164e2>] show_stack+0xc6/0xf8
 [<0000000000016624>] dump_stack+0xb0/0xc0
 [<000000000006cd36>] print_circular_bug_tail+0xa2/0xb4
 [<000000000006fa84>] __lock_acquire+0xe20/0x111c
 [<000000000006fe40>] lock_acquire+0xc0/0xf8
 [<00000000003b701c>] mutex_lock_nested+0xd0/0x364
 [<0000000000076094>] get_online_cpus+0x50/0x78
 [<000000000003a03e>] arch_reinit_sched_domains+0x26/0x58
 [<000000000002700e>] topology_work_fn+0x26/0x34
 [<0000000000059d4e>] run_workqueue+0x176/0x278
 [<0000000000059edc>] worker_thread+0x8c/0xf0
 [<000000000005f5bc>] kthread+0x68/0xa0
 [<000000000001a33e>] kernel_thread_starter+0x6/0xc
 [<000000000001a338>] kernel_thread_starter+0x0/0xc
INFO: lockdep is turned off.

Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

This exposes the core siblings to user space via sysfs.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>

Introduce an ->isc field in the subchannel to store the desired
interruption subclass, since sch->schib.pmcw.isc may be overwritten
by the hardware on stsch() after machine checks.
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Signed-off-by: NMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

On some smp sysfs store attributes get_online_cpus() may block on
cpu_hotplug.lock, but we hold already smp_cpu_state_mutex. Since the
locking order on cpu hotplug via arch_update_cpu_topology is inverse
this might lead to deadlocks.
So make sure locking order is always the same.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

In order to protect against compile breakage in case the header file
gets included twice.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

This is where it should be and we can get rid of some externs
and a static inline function.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

Make parsing of attribute writes handle incorrect input better.
Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

* git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/v4l-dvb:
  V4L/DVB (7798): tuners/Kconfig: Change config name and help to reflect dynamic load for tuners
  V4L/DVB (7794): cx88: Fix a warning
  V4L/DVB (7792): ivtv: correct misspelled "HIMEM4G" to "HIGHMEM4G" in error message
  V4L/DVB (7791): ivtv: POLLHUP must be returned on eof
  V4L/DVB (7789b): Fix merge conflicts

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (48 commits)
  ext4: fix hot spins in mballoc after err_freebuddy and err_freemeta
  ext4: fix test ext_generic_write_end() copied return value
  ext3: fix test ext_generic_write_end() copied return value
  ext4: Move mballoc headers/structures to a seperate header file mballoc.h
  ext4: cleanup for compiling mballoc with verification and debugging #defines
  ext4: don't use ext4_error in ext4_check_descriptors
  ext4: mark inode dirty after initializing the extent tree
  ext4: update ctime and mtime for truncate with extents.
  ext4: Don't do GFP_NOFS allocations after taking ext4_lock_group
  ext4: move headers out of include/linux
  ext4: fix wrong gfp type under transaction
  ext4: Fix hang on umount with quotas when journal is aborted
  ext4: Fix update of mtime and ctime on rename
  jdb2: replace remaining __FUNCTION__ occurrences
  ext4: replace remaining __FUNCTION__ occurrences
  jbd2: only create debugfs and stats entries if init is successful
  jbd2: fix kernel-doc notation
  jbd2: replace potentially false assertion with if block
  jbd2: eliminate duplicated code in revocation table init/destroy functions
  jbd2: tidy up revoke cache initialisation and destruction
  ...

* 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6: (24 commits)
  [XFS] Fix build failure after enabling CONFIG_XFS_DEBUG
  [XFS] remove dmapi cruft in xfs_file.c
  [XFS] remove sendfile leftovers
  [XFS] allow enabling CONFIG_XFS_DEBUG
  [XFS] Don't initialise new inode generation numbers to zero
  [XFS] Fix check for block zero access in xfs_write_iomap_allocate()
  [XFS] Don't double count reserved block changes on UP.
  [XFS] remove xfs_log_ticket_zone on rmmod
  [XFS] fix non-smp xfs build
  [XFS] Fix broken HAVE_SPLICE removal commit.
  [XFS] kill XFS_ICSB_SB_LOCKED
  [XFS] split xfs_icsb_balance_counter
  [XFS] Add xfs_icsb_sync_counters_locked for when m_sb_lock already held
  [XFS] Cleanup xfs_attr a bit with xfs_name and remove cred
  [XFS] kill usesless IHOLD calls in xfs_remove and xfs_rmdir
  [XFS] kill parent == child checks in xfs_remove and xfs_rmdir
  [XFS] kill usesless IHOLD calls in xfs_rename
  [XFS] remove manual lookup from xfs_rename and simplify locking
  [XFS] shrink mrlock_t
  [XFS] simplify xfs_lookup
  ...

Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/cx88/cx88-i2c.c: In function 'attach_inform':
drivers/media/video/cx88/cx88-i2c.c:102: warning: unused variable 'tun_setup'
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

Commit c3c52bce ("edac: fix module
initialization on several modules 2nd time") added a call to opstate_init
but did not include linux/edac.h that declares it.
Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Some Kconfig names were changed. This patch reapplies the rename script,
fixing for those drivers merged after the patch that renamed those
items.
Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

In ext4_mb_init_backend() 'i' is of type ext4_group_t. Since unsigned, i
>= 0 is always true, so fix hot spins after err_freebuddy: and -meta:
and prevent decrements when zero.
Signed-off-by: NRoel Kluin <12o3l@tiscali.nl>
Signed-off-by: NMingming Cao <cmm@us.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

'copied' is unsigned, whereas 'ret2' is not. The test (copied < 0) fails
Signed-off-by: NRoel Kluin <12o3l@tiscali.nl>
Signed-off-by: NMingming Cao <cmm@us.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

'copied' is unsigned, whereas 'ret2' is not. The test (copied < 0) fails
Signed-off-by: NRoel Kluin <12o3l@tiscali.nl>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

Move function and structure definiations out of mballoc.c and put it under
a new header file mballoc.h
Signed-off-by: NMingming Cao <cmm@us.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

This patch allows compiling mballoc with:
#define AGGRESSIVE_CHECK
#define DOUBLE_CHECK
#define MB_DEBUG

It fixes:
Compilation errors:
fs/ext4/mballoc.c: In function '__mb_check_buddy':
fs/ext4/mballoc.c:605: error: 'struct ext4_prealloc_space' has no member named 'group_list'
fs/ext4/mballoc.c:606: error: 'struct ext4_prealloc_space' has no member named 'pstart'
fs/ext4/mballoc.c:608: error: 'struct ext4_prealloc_space' has no member named 'len'

Compilation warnings:
fs/ext4/mballoc.c: In function 'ext4_mb_normalize_group_request':
fs/ext4/mballoc.c:2863: warning: format '%lu' expects type 'long unsigned int', but argument 3 has type 'int'
fs/ext4/mballoc.c: In function 'ext4_mb_use_inode_pa':
fs/ext4/mballoc.c:3103: warning: format '%lu' expects type 'long unsigned int', but argument 3 has type 'int'

Sparse check:
fs/ext4/mballoc.c:3818:2: warning: context imbalance in 'ext4_mb_show_ac' - different lock contexts for basic block
Signed-off-by: NSolofo Ramangalahy <Solofo.Ramangalahy@bull.net>
Signed-off-by: NMingming Cao <cmm@us.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

Because ext4_check_descriptors is called at mount time you can't use ext4_error
as it calls ext4_commit_sb, which since the sb isn't all the way initialized
causes bad things to happen (ie a panic).  This patch changes the ext4_error's
to printk's to keep this problem from happening.  Thanks much,
Signed-off-by: NJosef Bacik <jbacik@redhat.com>
Signed-off-by: NMingming Cao <cmm@us.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

We should mark the inode dirty only after initializing the extent
tree.  Also if we fail during extent initialization we need
to call DQUOT_FREE_INODE.
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

The recently announced "Linux POSIX file system test suite"
caught a truncate issue when using extents:
mtime and ctime are not updated when truncate is successful.

This is the single issue caught with "default" ext4 (mkfs and mount
with minimal options).
The testsuite does not report failure with -o noextents.

With the following patch, all tests of the testsuite pass.
Signed-off-by: NSolofo Ramangalahy <Solofo.Ramangalahy@bull.net>
Signed-off-by: Mingming Cao <cmm@us.ibm.com> 
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

We can't do GFP_NOFS allocation after taking ext4_lock_group

BUG: sleeping function called from invalid context at mm/slab.c:3054
in_atomic():1, irqs_disabled():0
1 lock held by vi/2426:
#0:  (&ei->i_data_sem){----}, at: [<c01cf665>] ext4_release_file+0x23/0x66
Pid: 2426, comm: vi Not tainted 2.6.25-rc7 #24
[<c011a3dc>] __might_sleep+0xbe/0xc5
[<c01620c9>] kmem_cache_alloc+0x22/0xa6
[<c01e382a>] ext4_mb_release_inode_pa+0x73/0x1b3
[<c01e6adf>] ext4_mb_discard_inode_preallocations+0x22d/0x2d4
[<c013000a>] ? param_set_ushort+0x32/0x39
[<c01ceba1>] ext4_discard_reservation+0x27/0x6a
[<c01cf66c>] ext4_release_file+0x2a/0x66
[<c0165bd6>] __fput+0xae/0x155
[<c0165e46>] fput+0x17/0x19
[<c0163756>] filp_close+0x50/0x5a
[<c01647c0>] sys_close+0x71/0xad
[<c0104aba>] sysenter_past_esp+0x5f/0xa5
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: NMingming Cao <cmm@us.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] Provide ACPI fixup for /proc/cpuinfo/physical_id
  [IA64] Remove printk noise on unimplemented SAL_PHYSICAL_ID_INFO
  [IA64] allocate multiple contiguous pages via uncached allocator
  [IA64] bugfix: nptcg breaks cpu-hotadd

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
  Smack: Integrate Smack with Audit
  Security: Typecast CAP_*_SET macros
  Security: Make secctx_to_secid() take const secdata

Setup the new Audit hooks for Smack. SELinux Audit rule fields are recycled
to avoid `auditd' userspace modifications. Currently only equality testing
is supported on labels acting as a subject (AUDIT_SUBJ_USER) or as an object
(AUDIT_OBJ_USER).
Signed-off-by: NAhmed S. Darwish <darwish.07@gmail.com>
Acked-by: NCasey Schaufler <casey@schaufler-ca.com>

Cast the CAP_*_SET macros to be of kernel_cap_t type to avoid compiler
warnings.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NJames Morris <jmorris@namei.org>

Make secctx_to_secid() take constant secdata.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NCasey Schaufler <casey@schaufler-ca.com>
Signed-off-by: NJames Morris <jmorris@namei.org>

* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  [libata] linux/libata.h: reorganize ata_device struct members a bit
  ahci: SB600 ahci can't do MSI, blacklist that capability
  libata: More TSSTcorp pain, keep in sync with legacy IDE
  pata_via: Fix 6410 misdetect
  [libata] pata_atiixp: fix PIO timing data misprogramming

* master.kernel.org:/home/rmk/linux-2.6-arm: (26 commits)
  [ARM] pxa: fix 1c104e0e
  [ARM] serial: s3c2410: platform_get_irq() may return signed unnoticed
  [ARM] am79c961a: platform_get_irq() may return signed unnoticed
  [ARM] Feroceon: Feroceon-specific WA-cache compatible {copy,clear}_user_page()
  [ARM] Feroceon: fix function alignment in proc-feroceon.S
  [ARM] Orion: catch a couple more alternative spellings of PCIe
  [ARM] Orion: fix orion-ehci platform resource end addresses
  [ARM] Orion: fix ->map_irq() PCIe bus number check
  [ARM] Orion: fix ioremap() optimization
  [ARM] feroceon: remove CONFIG_CPU_CACHE_ROUND_ROBIN check
  [ARM] feroceon: remove CONFIG_CPU_DCACHE_WRITETHROUGH check
  kprobes/arm: fix decoding of arithmetic immediate instructions
  kprobes/arm: fix cache flush address for instruction stub
  [ARM] 5022/1: Race in ARM MMCI PL18x driver, V2
  [ARM] 5021/1: at91: buildfix for sam9263 + PM
  [ARM] 5018/1: RealView: Fix the ARM11MPCore Oprofile compilation
  [ARM] 5016/1: AT91: typo in mci configuration for at91cap at91sam9263
  [ARM] 5017/1: pxa3xx: Report unsupported wakeup sources in pxa3xx_set_wake()
  [ARM] 5020/1: magician: remove __devinit marker from pasic3_leds_info
  [ARM] 5014/1: Cleanup reset state before entering suspend or resetting.
  ...

Move ext4 headers out of include/linux.  This is just the trivial move,
there's some more thing that could be done later. 
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMingming Cao <cmm@us.ibm.com>
Signed-off-by: N"Theodore Ts'o" <tytso@mit.edu>