linux-toradex.git, branch v3.0.1

Linux 3.0.1

2011-08-05T04:59:21+00:00

dm: fix idr leak on module removal

2011-08-05T04:58:43+00:00

commit d15b774c2920d55e3d58275c97fbe3adc3afde38 upstream.

Destroy _minor_idr when unloading the core dm module.  (Found by kmemleak.)

Signed-off-by: Alasdair G Kergon 
Signed-off-by: Greg Kroah-Hartman

dm mpath: fix potential NULL pointer in feature arg processing

2011-08-05T04:58:43+00:00

commit 286f367dad40beb3234a18c17391d03ba939a7f3 upstream.

Avoid dereferencing a NULL pointer if the number of feature arguments
supplied is fewer than indicated.

Signed-off-by: Mike Snitzer 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Greg Kroah-Hartman

dm snapshot: flush disk cache when merging

2011-08-05T04:58:42+00:00

commit 762a80d9fc9f690a3a35983f3b4619a220650808 upstream.

This patch makes dm-snapshot flush disk cache when writing metadata for
merging snapshot.

Without cache flushing the disk may reorder metadata write and other
data writes and there is a possibility of data corruption in case of
power fault.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Greg Kroah-Hartman

dm io: flush cpu cache with vmapped io

2011-08-05T04:58:42+00:00

commit bb91bc7bacb906c9f3a9b22744c53fa7564b51ba upstream.

For normal kernel pages, CPU cache is synchronized by the dma layer.
However, this is not done for pages allocated with vmalloc. If we do I/O
to/from vmallocated pages, we must synchronize CPU cache explicitly.

Prior to doing I/O on vmallocated page we must call
flush_kernel_vmap_range to flush dirty cache on the virtual address.
After finished read we must call invalidate_kernel_vmap_range to
invalidate cache on the virtual address, so that accesses to the virtual
address return newly read data and not stale data from CPU cache.

This patch fixes metadata corruption on dm-snapshots on PA-RISC and
possibly other architectures with caches indexed by virtual address.

Signed-off-by: Mikulas Patocka 
Signed-off-by: Alasdair G Kergon 
Signed-off-by: Greg Kroah-Hartman

ALSA: sound/core/pcm_compat.c: adjust array index

2011-08-05T04:58:42+00:00

commit ca9380fd68514c7bc952282c1b4fc70607e9fe43 upstream.

Convert array index from the loop bound to the loop index.

A simplified version of the semantic patch that fixes this problem is as
follows: (http://coccinelle.lip6.fr/)

// 
@@
expression e1,e2,ar;
@@

for(e1 = 0; e1 < e2; e1++) { <...
  ar[
- e2
+ e1
  ]
  ...> }
// 

Signed-off-by: Julia Lawall 
Signed-off-by: Takashi Iwai 
Signed-off-by: Greg Kroah-Hartman

watchdog: shwdt: fix usage of mod_timer

2011-08-05T04:58:42+00:00

commit bea1906620ce72b63f83735c4cc2642b25ec54ae upstream.

Fix the usage of mod_timer() and make the driver usable. mod_timer() must
be called with an absolute timeout in jiffies. The old implementation
used a relative timeout thus the hardware watchdog was never triggered.

Signed-off-by: David Engraf 
Signed-off-by: Paul Mundt 
Signed-off-by: Wim Van sebroeck 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

GFS2: Fix mount hang caused by certain access pattern to sysfs files

2011-08-05T04:58:42+00:00

commit 19237039919088781b4191a00bdc1284d8fea1dd upstream.

Depending upon the order of userspace/kernel during the
mount process, this can result in a hang without the
_all version of the completion.

Signed-off-by: Steven Whitehouse 
Signed-off-by: Greg Kroah-Hartman

rt2x00: Add device ID for RT539F device.

2011-08-05T04:58:42+00:00

commit 71e0b38c2914018b01f3f08b43ee9e3328197699 upstream.

Reported-by: Wim Vander Schelden 
Signed-off-by: Gertjan van Wingerde 
Signed-off-by: Ivo van Doorn 
Signed-off-by: John W. Linville 
Signed-off-by: Greg Kroah-Hartman

oom: task->mm == NULL doesn't mean the memory was freed

2011-08-05T04:58:42+00:00

commit c027a474a68065391c8773f6e83ed5412657e369 upstream.

exit_mm() sets ->mm == NULL then it does mmput()->exit_mmap() which
frees the memory.

However select_bad_process() checks ->mm != NULL before TIF_MEMDIE,
so it continues to kill other tasks even if we have the oom-killed
task freeing its memory.

Change select_bad_process() to check ->mm after TIF_MEMDIE, but skip
the tasks which have already passed exit_notify() to ensure a zombie
with TIF_MEMDIE set can't block oom-killer. Alternatively we could
probably clear TIF_MEMDIE after exit_mmap().

Signed-off-by: Oleg Nesterov 
Reviewed-by: KOSAKI Motohiro 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman