linux-stable.git/include, branch linux-2.6.31.y

Split 'flush_old_exec' into two functions

2010-04-01T22:55:56+00:00

commit 221af7f87b97431e3ee21ce4b0e77d5411cf1549 upstream.

'flush_old_exec()' is the point of no return when doing an execve(), and
it is pretty badly misnamed.  It doesn't just flush the old executable
environment, it also starts up the new one.

Which is very inconvenient for things like setting up the new
personality, because we want the new personality to affect the starting
of the new environment, but at the same time we do _not_ want the new
personality to take effect if flushing the old one fails.

As a result, the x86-64 '32-bit' personality is actually done using this
insane "I'm going to change the ABI, but I haven't done it yet" bit
(TIF_ABI_PENDING), with SET_PERSONALITY() not actually setting the
personality, but just the "pending" bit, so that "flush_thread()" can do
the actual personality magic.

This patch in no way changes any of that insanity, but it does split the
'flush_old_exec()' function up into a preparatory part that can fail
(still called flush_old_exec()), and a new part that will actually set
up the new exec environment (setup_new_exec()).  All callers are changed
to trivially comply with the new world order.

Signed-off-by: H. Peter Anvin 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman 
Signed-off-by: Stefan Bader

mm: replace various uses of num_physpages by totalram_pages

2010-04-01T22:55:50+00:00

commit 4481374ce88ba8f460c8b89f2572027bd27057d0 upstream.

Sizing of memory allocations shouldn't depend on the number of physical
pages found in a system, as that generally includes (perhaps a huge amount
of) non-RAM pages.  The amount of what actually is usable as storage
should instead be used as a basis here.

Some of the calculations (i.e.  those not intending to use high memory)
should likely even use (totalram_pages - totalhigh_pages).

Signed-off-by: Jan Beulich 
Acked-by: Rusty Russell 
Acked-by: Ingo Molnar 
Cc: Dave Airlie 
Cc: Kyle McMartin 
Cc: Jeremy Fitzhardinge 
Cc: Pekka Enberg 
Cc: Hugh Dickins 
Cc: "David S. Miller" 
Cc: Patrick McHardy 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

SCSI: enclosure: fix oops while iterating enclosure_status array

2010-04-01T22:55:39+00:00

commit cc9b2e9f6603190c009e5d2629ce8e3f99571346 upstream.

Based on patch originally by Jeff Mahoney 

 enclosure_status is expected to be a NULL terminated array of strings
 but isn't actually NULL terminated. When writing an invalid value to
 /sys/class/enclosure/.../.../status, it goes off the end of the array
 and Oopses.


Fix by making the assumption true and adding NULL at the end.

Reported-by: Artur Wojcik 
Signed-off-by: James Bottomley 
Signed-off-by: Greg Kroah-Hartman

connector: Delete buggy notification code.

2010-04-01T22:55:30+00:00

commit f98bfbd78c37c5946cc53089da32a5f741efdeb7 upstream.

On Tue, Feb 02, 2010 at 02:57:14PM -0800, Greg KH (gregkh@suse.de) wrote:
> > There are at least two ways to fix it: using a big cannon and a small
> > one. The former way is to disable notification registration, since it is
> > not used by anyone at all. Second way is to check whether calling
> > process is root and its destination group is -1 (kind of priveledged
> > one) before command is dispatched to workqueue.
>
> Well if no one is using it, removing it makes the most sense, right?
>
> No objection from me, care to make up a patch either way for this?

Getting it is not used, let's drop support for notifications about
(un)registered events from connector.
Another option was to check credentials on receiving, but we can always
restore it without bugs if needed, but genetlink has a wider code base
and none complained, that userspace can not get notification when some
other clients were (un)registered.

Kudos for Sebastian Krahmer , who found a bug in the
code.

Signed-off-by: Evgeniy Polyakov 
Acked-by: Greg Kroah-Hartman 
Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman

resource: add helpers for fetching rlimits

2010-04-01T22:55:28+00:00

commit 3e10e716abf3c71bdb5d86b8f507f9e72236c9cd upstream.

We want to be sure that compiler fetches the limit variable only
once, so add helpers for fetching current and maximal resource
limits which do that.

Add them to sched.h (instead of resource.h) due to circular dependency
 sched.h->resource.h->task_struct
Alternative would be to create a separate res_access.h or similar.

Signed-off-by: Jiri Slaby 
Cc: James Morris 
Cc: Heiko Carstens 
Cc: Andrew Morton 
Cc: Ingo Molnar 
Signed-off-by: Greg Kroah-Hartman

quota: decouple fs reserved space from quota reservation

2010-01-06T22:26:52+00:00

commit fd8fbfc1709822bd94247c5b2ab15a5f5041e103 upstream.

Currently inode_reservation is managed by fs itself and this
reservation is transfered on dquot_transfer(). This means what
inode_reservation must always be in sync with
dquot->dq_dqb.dqb_rsvspace. Otherwise dquot_transfer() will result
in incorrect quota(WARN_ON in dquot_claim_reserved_space() will be
triggered)
This is not easy because of complex locking order issues
for example http://bugzilla.kernel.org/show_bug.cgi?id=14739

The patch introduce quota reservation field for each fs-inode
(fs specific inode is used in order to prevent bloating generic
vfs inode). This reservation is managed by quota code internally
similar to i_blocks/i_bytes and may not be always in sync with
internal fs reservation.

Also perform some code rearrangement:
- Unify dquot_reserve_space() and dquot_reserve_space()
- Unify dquot_release_reserved_space() and dquot_free_space()
- Also this patch add missing warning update to release_rsv()
  dquot_release_reserved_space() must call flush_warnings() as
  dquot_free_space() does.

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jan Kara 
Signed-off-by: Greg Kroah-Hartman

Add unlocked version of inode_add_bytes() function

2010-01-06T22:26:51+00:00

commit b462707e7ccad058ae151e5c5b06eb5cadcb737f upstream.

Quota code requires unlocked version of this function. Off course
we can just copy-paste the code, but copy-pasting is always an evil.

Signed-off-by: Dmitry Monakhov 
Signed-off-by: Jan Kara 
Signed-off-by: Greg Kroah-Hartman

ipv6: reassembly: use seperate reassembly queues for conntrack and local delivery

2010-01-06T22:26:41+00:00

commit 0b5ccb2ee250136dd7385b1c7da28417d0d4d32d upstream.

Currently the same reassembly queue might be used for packets reassembled
by conntrack in different positions in the stack (PREROUTING/LOCAL_OUT),
as well as local delivery. This can cause "packet jumps" when the fragment
completing a reassembled packet is queued from a different position in the
stack than the previous ones.

Add a "user" identifier to the reassembly queue key to seperate the queues
of each caller, similar to what we do for IPv4.

Signed-off-by: Patrick McHardy 
Signed-off-by: Greg Kroah-Hartman

drm/i915: Fix sync to vblank when VGA output is turned off

2009-12-18T21:44:26+00:00

commit 778c902640530371a169ad1c03566e7c51b09874 upstream

In current vblank-wait implementation, if we turn off VGA output,
drm_wait_vblank will still wait on the disabled pipe until timeout,
because vblank on the pipe is assumed be enabled. This would cause
slow system response on some system such as moblin.

This patch resolve the issue by adding a drm helper function
drm_vblank_off which explicitly clear vblank_enabled[crtc], wake up
any waiting queue and save last vblank counter before turning off
crtc. It also slightly change drm_vblank_get to ensure that we will
will return immediately if trying to wait on a disabled pipe.

Signed-off-by: Li Peng 
Reviewed-by: Jesse Barnes 
[anholt: hand-applied for conflicts with overlay changes]
Signed-off-by: Eric Anholt 
Cc: Stefan Bader 
Signed-off-by: Greg Kroah-Hartman

Revert "isdn: isdn_ppp: Use SKB list facilities instead of home-grown implementation."

2009-12-18T21:43:54+00:00

[ Upstream commit e29d4363174949a7a4e46f670993d7ff43342c1c ]

This reverts commit 38783e671399b5405f1fd177d602c400a9577ae6.

It causes kernel bugzilla #14594

Signed-off-by: David S. Miller 
Signed-off-by: Greg Kroah-Hartman