From a76eef9573c93f8f324ebacfd090a3e319a64d59 Mon Sep 17 00:00:00 2001 From: FUJITA Tomonori Date: Fri, 25 Jul 2008 19:44:39 -0700 Subject: block/blk-map.c: use the new object_is_on_stack() helper Signed-off-by: FUJITA Tomonori Cc: Bartlomiej Zolnierkiewicz Cc: Thomas Bogendoerfer Cc: Tejun Heo Cc: Jens Axboe Cc: James Bottomley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- block/blk-map.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) (limited to 'block') diff --git a/block/blk-map.c b/block/blk-map.c index ddd96fb11a7d..af37e4ae62f5 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -269,7 +269,6 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf, int reading = rq_data_dir(rq) == READ; int do_copy = 0; struct bio *bio; - unsigned long stack_mask = ~(THREAD_SIZE - 1); if (len > (q->max_hw_sectors << 9)) return -EINVAL; @@ -278,11 +277,8 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf, kaddr = (unsigned long)kbuf; alignment = queue_dma_alignment(q) | q->dma_pad_mask; - do_copy = ((kaddr & alignment) || (len & alignment)); - - if (!((kaddr & stack_mask) ^ - ((unsigned long)current->stack & stack_mask))) - do_copy = 1; + do_copy = ((kaddr & alignment) || (len & alignment) || + object_is_on_stack(kbuf)); if (do_copy) bio = bio_copy_kern(q, kbuf, len, gfp_mask, reading); -- cgit v1.2.3