diff options
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-07-27 02:04:59 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-07-27 02:04:59 +0400 |
| commit | d9ecdb282c91952796b7542c4f57fd6de6948d7b (patch) | |
| tree | fd4de7923968afa7d2981fb037e2255fc2cfa1e1 /block/blk-map.c | |
| parent | 4ef584ba84125b67c17b5aded38e7783cd8cdef0 (diff) | |
| parent | 1d1f8b377c48e5aeddaea52eba74cc0539f088cd (diff) | |
| download | linux-d9ecdb282c91952796b7542c4f57fd6de6948d7b.tar.xz | |
Merge branch 'for_rmk_13' of git://git.mnementh.co.uk/linux-2.6-im
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); |