From: Dima Zavin <dima@android.com>
Date: Tue, 26 Oct 2010 21:21:54 +0000 (-0700)
Subject: mm: add a might_sleep_if() to dma_pool_alloc()
X-Git-Tag: v2.6.37-rc1~105^2~128
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ea05c8444e451f1cfbf78c68733e717ad7b8602b;p=pandora-kernel.git

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>
---

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