linux-kernel - [PATCH] block: blk_queue_bounce

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Date:	Mon, 19 May 2008 20:24:09 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Jens Axboe <jens.axboe@...cle.com>
Cc:	linux-kernel@...r.kernel.org, akpm@...ux-foundation.org
Subject: [PATCH] block: blk_queue_bounce_limits can actually sleep

From: Arjan van de Ven <arjan@...ux.intel.com>
Subject: [PATCH] block: blk_queue_bounce_limits can actually sleep

blk_queue_bounce_limit can call init_emergency_isa_pool, which
does sleeping allocations... document it as such by adding might_sleep() to the driver

Signed-off-by: Arjan van de Ven <arjan@...ux.intel.com>
---
 block/blk-settings.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/block/blk-settings.c b/block/blk-settings.c
index 8dd8641..c420a67 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -148,6 +148,7 @@ void blk_queue_bounce_limit(struct request_queue *q, u64 dma_addr)
 	q->bounce_pfn = b_pfn;
 #endif
 	if (dma) {
+		might_sleep();
 		init_emergency_isa_pool();
 		q->bounce_gfp = GFP_NOIO | GFP_DMA;
 		q->bounce_pfn = b_pfn;
-- 
1.5.4.5

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