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authorNamhyung Kim <namhyung@gmail.com>2010-09-15 13:08:27 +0200
committerJens Axboe <jaxboe@fusionio.com>2010-09-15 13:08:27 +0200
commit144177991ca624841ddbd1e7edff958fc0f6d1fe (patch)
tree793a42427d46585c0acfcfe97d23e604174a2c10 /block/blk-map.c
parent8dcbdc742fec9e6c542ff9cb599d2ee620753d07 (diff)
downloadkernel-144177991ca624841ddbd1e7edff958fc0f6d1fe.tar.gz
block: fix an address space warning in blk-map.c
Change type of 2nd parameter of blk_rq_aligned() into unsigned long and remove unnecessary casting. Now we can call it with 'uaddr' instead of 'ubuf' in __blk_rq_map_user() so that it can remove following warnings from sparse: block/blk-map.c:57:31: warning: incorrect type in argument 2 (different address spaces) block/blk-map.c:57:31: expected void *addr block/blk-map.c:57:31: got void [noderef] <asn:1>*ubuf However blk_rq_map_kern() needs one more local variable to handle it. Signed-off-by: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
Diffstat (limited to 'block/blk-map.c')
-rw-r--r--block/blk-map.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/block/blk-map.c b/block/blk-map.c
index c65d7593f7f1..ac0f7d46db63 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -54,7 +54,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq,
* direct dma. else, set up kernel bounce buffers
*/
uaddr = (unsigned long) ubuf;
- if (blk_rq_aligned(q, ubuf, len) && !map_data)
+ if (blk_rq_aligned(q, uaddr, len) && !map_data)
bio = bio_map_user(q, NULL, uaddr, len, reading, gfp_mask);
else
bio = bio_copy_user(q, map_data, uaddr, len, reading, gfp_mask);
@@ -288,6 +288,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
unsigned int len, gfp_t gfp_mask)
{
int reading = rq_data_dir(rq) == READ;
+ unsigned long addr = (unsigned long) kbuf;
int do_copy = 0;
struct bio *bio;
int ret;
@@ -297,7 +298,7 @@ int blk_rq_map_kern(struct request_queue *q, struct request *rq, void *kbuf,
if (!len || !kbuf)
return -EINVAL;
- do_copy = !blk_rq_aligned(q, kbuf, len) || object_is_on_stack(kbuf);
+ do_copy = !blk_rq_aligned(q, addr, len) || object_is_on_stack(kbuf);
if (do_copy)
bio = bio_copy_kern(q, kbuf, len, gfp_mask, reading);
else