Commit Graph

44895 Commits

Author SHA1 Message Date
Yasunori Goto
5c95da9f5a [PATCH] compile error of register_memory()
register_memory() becomes double definition in 2.6.20-rc1.  It is defined
in arch/i386/kernel/setup.c as static definition in 2.6.19.  But it is
moved to arch/i386/kernel/e820.c in 2.6.20-rc1.  And same name function is
defined in driver/base/memory.c too.  So, it becomes cause of compile error
of duplicate definition if memory hotplug option is on.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:49 -08:00
Yasunori Goto
561ccd3a97 [PATCH] handle SLOB with sparsemen
This is to disallow to make SLOB with SMP or SPARSEMEM.  This avoids latent
troubles of SLOB with SLAB_DESTROY_BY_RCU.  And fix compile error.

Signed-off-by: Yasunori Goto <y-goto@jp.fujitsu.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:49 -08:00
Nick Piggin
7de6b80579 [PATCH] mm: more rmap debugging
Add more debugging in the rmap code in an attempt to locate to source of
the occasional "mapcount went negative" assertions.

Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:49 -08:00
Ed L. Cashin
19900cdee2 [PATCH] fix aoe without scatter-gather [Bug 7662]
Fix a bug that only appears when AoE goes over a network card that does not
support scatter-gather.  The headers in the linear part of the skb appeared
to be larger than they really were, resulting in data that was offset by 24
bytes.

This patch eliminates the offset data on cards that don't support
scatter-gather or have had scatter-gather turned off.  There remains an
unrelated issue that I'll address in a separate email.

Fixes bugzilla #7662

Signed-off-by: "Ed L. Cashin" <ecashin@coraid.com>
Cc: <stable@kernel.org>
Cc: Greg KH <greg@kroah.com>
Cc: <boddingt@optusnet.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:49 -08:00
Robert P. J. Day
58637ec90b [PATCH] Add a new section to CodingStyle, promoting include/linux/kernel.h
Add a new section to the CodingStyle file, encouraging people not to
re-invent available kernel macros such as ARRAY_SIZE(), FIELD_SIZEOF(),
min() and max(), among others.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:49 -08:00
Josh Boyer
163ca88b9c [PATCH] Make JFFS depend on CONFIG_BROKEN
Mark JFFS as broken and provide a warning to users that it is deprecated
and scheduled for removal in 2.6.21

Signed-off-by: Josh Boyer <jwboyer@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:48 -08:00
Ingo Molnar
9127d4b1d9 [PATCH] lock debugging: fix DEBUG_LOCKS_WARN_ON() & debug_locks_silent
Matthew Wilcox noticed that the debug_locks_silent use should be inverted
in DEBUG_LOCKS_WARN_ON().  This bug was causing spurious stacktraces and
incorrect failures in the locking self-test on the parisc kernel.

Bug-found-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:48 -08:00
Michael Halcrow
ba3ff12fca [PATCH] fsstack: Remove inode copy
Trevor found a file size problem in eCryptfs in recent kernels, and he
tracked it down to an fsstack change.

This was the eCryptfs copy_attr_all:

> -void ecryptfs_copy_attr_all(struct inode *dest, const struct inode *src)
> -{
> -       dest->i_mode = src->i_mode;
> -       dest->i_nlink = src->i_nlink;
> -       dest->i_uid = src->i_uid;
> -       dest->i_gid = src->i_gid;
> -       dest->i_rdev = src->i_rdev;
> -       dest->i_atime = src->i_atime;
> -       dest->i_mtime = src->i_mtime;
> -       dest->i_ctime = src->i_ctime;
> -       dest->i_blkbits = src->i_blkbits;
> -       dest->i_flags = src->i_flags;
> -}

This is the fsstack copy_attr_all:

> +void fsstack_copy_attr_all(struct inode *dest, const struct inode *src,
> +                               int (*get_nlinks)(struct inode *))
> +{
> +       if (!get_nlinks)
> +               dest->i_nlink = src->i_nlink;
> +       else
> +               dest->i_nlink = (*get_nlinks)(dest);
> +
> +       dest->i_mode = src->i_mode;
> +       dest->i_uid = src->i_uid;
> +       dest->i_gid = src->i_gid;
> +       dest->i_rdev = src->i_rdev;
> +       dest->i_atime = src->i_atime;
> +       dest->i_mtime = src->i_mtime;
> +       dest->i_ctime = src->i_ctime;
> +       dest->i_blkbits = src->i_blkbits;
> +       dest->i_flags = src->i_flags;
> +
> +       fsstack_copy_inode_size(dest, src);
> +}

The addition of copy_inode_size breaks eCryptfs, since eCryptfs needs to
interpolate the file sizes (eCryptfs has extra space in the lower file for
the header).  The setting of the upper inode size occurs elsewhere in
eCryptfs, and the new copy_attr_all now undoes what eCryptfs was doing
right beforehand.

I see three ways of going forward from here.  (1) Something like this patch
needs to go in (assuming it jives with Unionfs), (2) we need to make a
change to the fsstack API for more fine-grained control over copying
attributes (e.g., by also including a callback function for calculating the
right file size, which will require some more work on both eCryptfs and
Unionfs), or (3) the fsstack patch on eCryptfs (commit
0cc72dc7f0 made on Fri Dec 8 02:36:31 2006
-0800) needs to be yanked in 2.6.20.

I think the simplest solution, from eCryptfs' perspective, is to just
remove the inode size copy.

Remove inode size copy in general fsstack attr copy code. Stacked
filesystems may need to interpolate the inode size, since the file
size in the lower file may be different than the file size in the
stacked layer.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Acked-by: Josef "Jeff" Sipek <jsipek@cs.sunysb.edu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:48 -08:00
Andrew Morton
ef8142a525 [PATCH] smc911 workqueue fixes
Teach this driver about the workqueue changes.

Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:48 -08:00
Vitaly Wool
9b6d2efed2 [PATCH] smc911x: fix netpoll compilation faliure
Fix the compilation failure for smc911x.c when NET_POLL_CONTROLLER is set.

Signed-off-by: Vitaly Wool <vitalywool@gmail.com>
Cc: Jeff Garzik <jeff@garzik.org>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:48 -08:00
Thomas Gleixner
9d7ac8be4b [PATCH] genirq: fix irq flow handler uninstall
The sanity check for no_irq_chip in __set_irq_hander() is unconditional on
both install and uninstall of an handler.  This triggers false warnings and
replaces no_irq_chip by dummy_irq_chip in the uninstall case.

Check only, when a real handler is installed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:48 -08:00
Magnus Damm
e903387f1e [PATCH] fix vm_events_fold_cpu() build breakage
fix vm_events_fold_cpu() build breakage

2.6.20-rc1 does not build properly if CONFIG_VM_EVENT_COUNTERS is set
and CONFIG_HOTPLUG is unset:

  CC      init/version.o
  LD      init/built-in.o
  LD      .tmp_vmlinux1
mm/built-in.o: In function `page_alloc_cpu_notify':
page_alloc.c:(.text+0x56eb): undefined reference to `vm_events_fold_cpu'
make: *** [.tmp_vmlinux1] Error 1

[akpm@osdl.org: cleanup]
Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:48 -08:00
Tim Chen
67af63a6ab [PATCH] sched: remove __cpuinitdata anotation to cpu_isolated_map
The structure cpu_isolated_map is used not only during initialization.
Multi-core scheduler configuration changes and exclusive cpusets
use this during run time.  During setting of sched_mc_power_savings
 policy, this structure is accessed to update sched_domains.

Signed-off-by: Tim Chen <tim.c.chen@intel.com>
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Tobias Klauser
132e2bc3ee [PATCH] Add cscope generated files to .gitignore
Ignore files generated by 'make cscope'

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Nigel Cunningham
e07aa05b60 [PATCH] Fix swapped parameters in mm/vmscan.c
The version of mm/vmscan.c in Linus' current tree has swapped parameters in
the shrink_all_zones declaration and call, used by the various
suspend-to-disk implementations.  This doesn't seem to have any great
adverse effect, but it's clearly wrong.

Signed-off-by: Nigel Cunningham <nigel@suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Adrian Bunk
3b2b96abbf [PATCH] fs/sysv/: proper prototypes for 2 functions
Add proper prototypes for sysv_{init,destroy}_icache() in sysv.h

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Adrian Bunk
99eea6a105 [PATCH] make kernel/printk.c:ignore_loglevel_setup() static
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Randy Dunlap
af9997e426 [PATCH] fix kernel-doc warnings in 2.6.20-rc1
Fix kernel-doc warnings in 2.6.20-rc1.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Christoph Lameter
b7f869a284 [PATCH] slab: fix kmem_ptr_validate definition
The declaration of kmem_ptr_validate in slab.h does not match the
one in slab.c. Remove the fastcall attribute (this is the only use in
slab.c).

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Andrew Morton
533ffc289d [PATCH] rtc warning fix
drivers/char/rtc.c:116: warning: 'hpet_rtc_interrupt' defined but not used

Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Badari Pulavarty
92a3d03aab [PATCH] Fix for shmem_truncate_range() BUG_ON()
Ran into BUG() while doing madvise(REMOVE) testing.  If we are punching a
hole into shared memory segment using madvise(REMOVE) and the entire hole
is below the indirect blocks, we hit following assert.

	        BUG_ON(limit <= SHMEM_NR_DIRECT);

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:47 -08:00
Mark Fasheh
ba0084048a [PATCH] Conditionally check expected_preempt_count in __resched_legal()
Commit 2d7d253548 ("fix cond_resched() fix")
introduced an 'expected_preempt_count' parameter to __resched_legal() to
fix a bug where it was returning a false negative when called from
cond_resched_lock() and preemption was enabled.

Unfortunately this broke things for when preemption is disabled.
preempt_count() will always return zero, thus failing the check against any
value of expected_preempt_count not equal to zero.  cond_resched_lock() for
example, passes an expected_preempt_count value of 1.

So fix the fix for the cond_resched() fix by skipping the check of
preempt_count() against expected_preempt_count when preemption is disabled.

Credit should go to Sunil Mushran for spotting the bug during testing.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Paul Jackson
2aea4fb616 [PATCH] CONFIG_VM_EVENT_COUNTER comment decrustify
The VM event counters, enabled by CONFIG_VM_EVENT_COUNTERS, which provides
VM event counters in /proc/vmstat, has become more essential to
non-EMBEDDED kernel configurations than they were in the past.  Comments in
the code and the Kconfig configuration explanation were stale, downplaying
their role excessively.

Refresh those comments to correctly reflect the current role of VM event
counters.

Signed-off-by: Paul Jackson <pj@sgi.com>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Avi Kivity
0b76e20b27 [PATCH] KVM: API versioning
Add compile-time and run-time API versioning.

Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Michael Riepe
0f8e3d365a [PATCH] KVM: Handle p5 mce msrs
This allows plan9 to get a little further booting.

Signed-off-by: Michael Riepe <michael@mr511.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Michael Riepe
abacf8dff9 [PATCH] KVM: Force real-mode cs limit to 64K
This allows opensolaris to boot on kvm/intel.

Signed-off-by: Michael Riepe <michael@mr511.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Michael Riepe
bf591b24d0 [PATCH] KVM: Do not export unsupported msrs to userspace
Some msrs, such as MSR_STAR, are not available on all processors.  Exporting
them causes qemu to try to fetch them, which will fail.

So, check all msrs for validity at module load time.

Signed-off-by: Michael Riepe <michael@mr511.de>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Avi Kivity
2c26495710 [PATCH] KVM: Use more traditional error handling in kvm_mmu_init()
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Avi Kivity
36241b8c7c [PATCH] KVM: AMD SVM: Save and restore the floating point unit state
Fixes sf bug 1614113 (segfaults in nbench).

Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
Avi Kivity
0e859cacb0 [PATCH] KVM: AMD SVM: handle MSR_STAR in 32-bit mode
This is necessary for linux guests.

Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:46 -08:00
James Morris
5aacf0ca41 [PATCH] KVM: add valid_vcpu() helper
Consolidate the logic for checking whether a vcpu index is valid.  Also, use
likely(), as a valid value should be the overwhelmingly common case.

Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:45 -08:00
Andrew Morton
5f2a105d5e [PATCH] truncate: dirty memory accounting fix
Only (un)account for IO and page-dirtying for devices which have real backing
store (ie: not tmpfs or ramdisks).

Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-22 08:55:45 -08:00
Jens Axboe
bb4067e341 [PATCH] elevator: fixup typo in merge logic
The recent io scheduler allow_merge commit left the block layer with
no merging, oops. This patch fixes that up.

That means the CFQ change needs to be verified again, it might not fix
the original bug now.  But that's a seperate thing, I'll double check
that tomorrow.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 22:01:04 -08:00
Andrew Morton
3e67c0987d [PATCH] truncate: clear page dirtiness before running try_to_free_buffers()
truncate presently invalidates the dirty page's buffer_heads then shoots down
the page.  But try_to_free_buffers() will now bale out because the page is
dirty.

Net effect: the LRU gets filled with dirty pages which have invalidated
buffer_heads attached.  They have no ->mapping and hence cannot be cleaned.
The machine leaks memory at an enormous rate.

Fix this by cleaning the page before running try_to_free_buffers(), so
try_to_free_buffers() can do its work.

Also, remember to do dirty-page-acoounting in cancel_dirty_page() so the
machine won't wedge up trying to write non-existent dirty pages.

Probably still wrong, but now less so.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 11:17:26 -08:00
David Chinner
921320210b [PATCH] Fix XFS after clear_page_dirty() removal
XFS appears to call clear_page_dirty to get the mapping tree dirty tag
set correctly at the same time the page dirty flag is cleared.  I note
that this can be done by set_page_writeback() if we clear the dirty flag
on the page first when we are writing back the entire page.

Hence it seems to me that the XFS call to clear_page_dirty() could
easily be substituted by clear_page_dirty_for_io() followed by a call to
set_page_writeback() to get the mapping tree tags set correctly after
the page has been marked clean.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 10:01:08 -08:00
Miklos Szeredi
9280f6822c [PATCH] fuse: remove clear_page_dirty() call
The use by FUSE was just a remnant of an optimization from the time
when writable mappings were supported.

Now FUSE never actually allows the creation of dirty pages, so this
invocation of clear_page_dirty() is effectively a no-op.

Signed-off-by: Miklos Szeredi <miklos@szeredi.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 09:25:08 -08:00
Dave Kleikamp
d0e671a932 [PATCH] Fix JFS after clear_page_dirty() removal
This patch removes some questionable code that attempted to make a
no-longer-used page easier to reclaim.

Calling metapage_writepage against such a page will not result in any
I/O being performed, so removing this code shouldn't be a big deal.

[ It's likely that we could have just replaced the "clear_page_dirty()"
  call with a call to "cancel_dirty_page()" instead, but in the
  meantime this is cleaner and simpler anyway, so unless there is some
  overriding reason (and Dave implies there isn't) I'll just use this
  patch as-is.			- Linus ]

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 09:24:03 -08:00
Linus Torvalds
fba2591bf4 VM: Remove "clear_page_dirty()" and "test_clear_page_dirty()" functions
They were horribly easy to mis-use because of their tempting naming, and
they also did way more than any users of them generally wanted them to
do.

A dirty page can become clean under two circumstances:

 (a) when we write it out.  We have "clear_page_dirty_for_io()" for
     this, and that function remains unchanged.

     In the "for IO" case it is not sufficient to just clear the dirty
     bit, you also have to mark the page as being under writeback etc.

 (b) when we actually remove a page due to it becoming inaccessible to
     users, notably because it was truncate()'d away or the file (or
     metadata) no longer exists, and we thus want to cancel any
     outstanding dirty state.

For the (b) case, we now introduce "cancel_dirty_page()", which only
touches the page state itself, and verifies that the page is not mapped
(since cancelling writes on a mapped page would be actively wrong as it
is still accessible to users).

Some filesystems need to be fixed up for this: CIFS, FUSE, JFS,
ReiserFS, XFS all use the old confusing functions, and will be fixed
separately in subsequent commits (with some of them just removing the
offending logic, and others using clear_page_dirty_for_io()).

This was confirmed by Martin Michlmayr to fix the apt database
corruption on ARM.

Cc: Martin Michlmayr <tbm@cyrius.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Andrei Popa <andrei.popa@i-neo.ro>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Cc: Gordon Farquharson <gordonfarquharson@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 09:19:57 -08:00
Linus Torvalds
46d2277c79 Clean up and make try_to_free_buffers() not race with dirty pages
This is preparatory work in our continuing saga on some hard-to-trigger
file corruption with shared writable mmap() after the dirty page
tracking changes (commit d08b3851da etc)
were merged.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 09:04:31 -08:00
Ingo Molnar
9bfb18392e [PATCH] workqueue: fix schedule_on_each_cpu()
fix the schedule_on_each_cpu() implementation: __queue_work() is now
stricter, hence set the work-pending bit before passing in the new work.

(found in the -rt tree, using Peter Zijlstra's files-lock scalability
patchset)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 00:20:01 -08:00
Al Viro
5ccac88eeb [PATCH] fix leaks on pipe(2) failure exits
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 00:16:03 -08:00
Linus Torvalds
ba6d8b1eba Merge master.kernel.org:/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes
* master.kernel.org:/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes:
  [GFS2] Fix Kconfig
  [DLM] fix compile warning
2006-12-21 00:13:09 -08:00
Peter Williams
bc947631d1 [PATCH] sched: improve efficiency of sched_fork()
Problem:
  sched_fork() has always called scheduler_tick() in some (unlikely)
  circumstances in order to update the current task in light of those
  circumstances.  It has always been the case that the work done by
  scheduler_tick() was more than was required to handle the problem in
  hand but no harm was done except for the waste of a few CPU cycles.

  However, the splitting of scheduler_tick() into two procedures in
  2.6.20-rc1 enables the wasted cycles to be saved as the new procedure
  task_running_tick() does all the work that is required to rectify the
  problem being handled.

Solution:
  Replace the call to scheduler_tick() in sched_fork() with a call to
  task_running_tick().

Signed-off-by: Peter Williams <pwil3058@bigpond.com.au>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 00:11:51 -08:00
Ingo Molnar
136f1e7a8c [PATCH] x86_64: fix boot time hang in detect_calgary()
if CONFIG_CALGARY_IOMMU is built into the kernel via
CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT, or is enabled via the
iommu=calgary boot option, then the detect_calgary() function runs to
detect the presence of a Calgary IOMMU.

detect_calgary() first searches the BIOS EBDA area for a "rio_table_hdr"
BIOS table. It has this parsing algorithm for the EBDA:

	while (offset) {
		...
		/* The next offset is stored in the 1st word. 0 means no more */
 		offset = *((unsigned short *)(ptr + offset));
	}

got that? Lets repeat it slowly: we've got a BIOS-supplied data
structure, plus Linux kernel code that will only break out of an
infinite parsing loop once the BIOS gives a zero offset. Ok?

Translation: what an excellent opportunity for BIOS writers to lock up
the Linux boot process in an utterly hard to debug place! Indeed the
BIOS jumped on that opportunity on my box, which has the following EBDA
chaining layout:

  384, 65282, 65535, 65535, 65535, 65535, 65535, 65535 ...

see the pattern? So my, definitely non-Calgary system happily locks up
in detect_calgary()!

the patch below fixes the boot hang by trusting the BIOS-supplied data
structure a bit less: the parser always has to make forward progress,
and if it doesnt, we break out of the loop and i get the expected kernel
message:

  Calgary: Unable to locate Rio Grande Table in EBDA - bailing!

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 00:08:28 -08:00
Ingo Molnar
a9622f6219 [PATCH] x86_64: fix boot hang caused by CALGARY_IOMMU_ENABLED_BY_DEFAULT
one of my boxes didnt boot the 2.6.20-rc1-rt0 kernel rpm, it hung during
early bootup. After an hour or two of happy debugging i narrowed it down
to the CALGARY_IOMMU_ENABLED_BY_DEFAULT option, which was freshly added
to 2.6.20 via the x86_64 tree and /enabled by default/.

commit bff6547bb6 claims:

    [PATCH] Calgary: allow compiling Calgary in but not using it by default

    This patch makes it possible to compile Calgary in but not use it by
    default. In this mode, use 'iommu=calgary' to activate it.

but the change does not actually practice it:

 config CALGARY_IOMMU_ENABLED_BY_DEFAULT
        bool "Should Calgary be enabled by default?"
        default y
        depends on CALGARY_IOMMU
        help
          Should Calgary be enabled by default? if you choose 'y', Calgary
          will be used (if it exists). If you choose 'n', Calgary will not be
          used even if it exists. If you choose 'n' and would like to use
          Calgary anyway, pass 'iommu=calgary' on the kernel command line.
          If unsure, say Y.

it's both 'default y', and says "If unsure, say Y". Clearly not a typo.

disabling this option makes my box boot again. The patch below fixes the
Kconfig entry. Grumble.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 00:08:28 -08:00
Geert Uytterhoeven
b039db8eea [PATCH] __set_irq_handler bogus space
__set_irq_handler: Kill a bogus space

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-21 00:08:27 -08:00
Linus Torvalds
4604096768 Merge branch 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block
* 'for-linus' of git://brick.kernel.dk/data/git/linux-2.6-block:
  [PATCH] block: document io scheduler allow_merge_fn hook
  [PATCH] cfq-iosched: don't allow sync merges across queues
  [PATCH] Fixup blk_rq_unmap_user() API
  [PATCH] __blk_rq_unmap_user() fails to return error
  [PATCH] __blk_rq_map_user() doesn't need to grab the queue_lock
  [PATCH] Remove queue merging hooks
  [PATCH] ->nr_sectors and ->hard_nr_sectors are not used for BLOCK_PC requests
  [PATCH] cciss: fix XFER_READ/XFER_WRITE in do_cciss_request
  [PATCH] cciss: set default raid level when reading geometry fails
2006-12-21 00:03:38 -08:00
Linus Torvalds
8df8bb4adf Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  [libata] sata_svw, sata_vsc: kill iomem warnings
  [PATCH] libata: take scmd->cmd_len into account when translating SCSI commands
  [PATCH] libata: kill @cdb argument from xlat methods
  [PATCH] libata: clean up variable name usage in xlat related functions
  [libata] Move some PCI IDs from sata_nv to ahci
  [libata] pata_via: suspend/resume support fix
  [libata] pata_cs5530: suspend/resume support tweak
2006-12-21 00:02:35 -08:00
Linus Torvalds
28cb5ccd30 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/driver-2.6:
  Driver core: proper prototype for drivers/base/init.c:driver_init()
  kobject: kobject_uevent() returns manageable value
  kref refcnt and false positives
2006-12-21 00:02:03 -08:00
Linus Torvalds
de9b2fccb6 Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (22 commits)
  acpiphp: Link-time error for PCI Hotplug
  shpchp: cleanup shpchp.h
  shpchp: remove shpchprm_get_physical_slot_number
  shpchp: cleanup struct controller
  shpchp: remove unnecessary struct php_ctlr
  PCI: ATI sb600 sata quirk
  PCI legacy resource fix
  PCI: don't export device IDs to userspace
  PCI: Be a bit defensive in quirk_nvidia_ck804() so we don't risk dereferencing a NULL pdev.
  PCI: Fix multiple problems with VIA hardware
  PCI: Only check the HT capability bits in mpic.c
  PCI: Use pci_find_ht_capability() in drivers/pci/quirks.c
  PCI: Add #defines for Hypertransport MSI fields
  PCI: Use pci_find_ht_capability() in drivers/pci/htirq.c
  PCI: Add pci_find_ht_capability() for finding Hypertransport capabilities
  PCI: Create __pci_bus_find_cap_start() from __pci_bus_find_cap()
  pci: Introduce pci_find_present
  PCI: pcieport-driver: remove invalid warning message
  rpaphp: compiler warning cleanup
  PCI quirks: remove redundant check
  ...
2006-12-21 00:01:47 -08:00