From: Andrew Morton <akpm@linux-foundation.org>
Date: Thu, 13 Jan 2011 23:47:25 +0000 (-0800)
Subject: mm/dmapool.c: use TASK_UNINTERRUPTIBLE in dma_pool_alloc()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=684265d4a30f133162f06ddb2e5010608e60e4bb;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git

mm/dmapool.c: use TASK_UNINTERRUPTIBLE in dma_pool_alloc()

As it stands this code will degenerate into a busy-wait if the calling task
has signal_pending().

Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/dmapool.c b/mm/dmapool.c
index a2f6295b4df4..03bf3bb4519a 100644
--- a/mm/dmapool.c
+++ b/mm/dmapool.c
@@ -324,7 +324,7 @@ void *dma_pool_alloc(struct dma_pool *pool, gfp_t mem_flags,
 		if (mem_flags & __GFP_WAIT) {
 			DECLARE_WAITQUEUE(wait, current);
 
-			__set_current_state(TASK_INTERRUPTIBLE);
+			__set_current_state(TASK_UNINTERRUPTIBLE);
 			__add_wait_queue(&pool->waitq, &wait);
 			spin_unlock_irqrestore(&pool->lock, flags);