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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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
Andrew Morton 2011-01-13 15:47:25 -08:00 committed by Linus Torvalds
parent 84bc227d7f
commit 684265d4a3
1 changed files with 1 additions and 1 deletions
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mm/dmapool.c
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@ -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);