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Commit 684265d4 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds
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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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 84bc227d

mm/dmapool.c

+1 −1
Original line number Diff line number Diff line
@@ -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);