tree e1ebb0406f156e406b3bef5998084b688794923e
parent d65bfacb046f3df8aa11a9cb9b6e448f6171174d
author Dima Zavin <dima@android.com> 1288128114 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1288137128 -0700

mm: add a might_sleep_if() to dma_pool_alloc()

Buggy drivers (e.g.  fsl_udc) could call dma_pool_alloc from atomic
context with GFP_KERNEL.  In most instances, the first pool_alloc_page
call would succeed and the sleeping functions would never be called.  This
allowed the buggy drivers to slip through the cracks.

Add a might_sleep_if() checking for __GFP_WAIT in flags.

Signed-off-by: Dima Zavin <dima@android.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>