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 a2f6295b4df4ef4ab4fa5078be775ff81bc83c6f..03bf3bb4519a997b8a74c59732cc0feba66af80b 100644 (file)
--- 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);