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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-07-25 19:44:39 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-26 12:00:02 -0700 |
| commit | a76eef9573c93f8f324ebacfd090a3e319a64d59 (patch) | |
| tree | 078510944393a9f658550476160cdc856dd102a1 /block/blk-map.c | |
| parent | a2e2e3577c3ef2b5dbb866e97e612aae4adfa32f (diff) | |
| download | linux-stable-a76eef9573c93f8f324ebacfd090a3e319a64d59.tar.gz linux-stable-a76eef9573c93f8f324ebacfd090a3e319a64d59.tar.bz2 linux-stable-a76eef9573c93f8f324ebacfd090a3e319a64d59.zip | |
block/blk-map.c: use the new object_is_on_stack() helper
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Tejun Heo <htejun@gmail.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'block/blk-map.c')
| -rw-r--r-- | block/blk-map.c | 8 |
1 files changed, 2 insertions, 6 deletions
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); |