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| author | FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> | 2008-08-28 16:17:05 +0900 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:10 +0200 |
| commit | a3bce90edd8f6cafe3f63b1a943800792e830178 (patch) | |
| tree | c07a2962987e57997b4ff6f6c63febe1feaa0a9c /block/blk-map.c | |
| parent | 45333d5a31296d0af886d94f1d08f128231cab8e (diff) | |
| download | lwn-a3bce90edd8f6cafe3f63b1a943800792e830178.tar.gz lwn-a3bce90edd8f6cafe3f63b1a943800792e830178.zip | |
block: add gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov
Currently, blk_rq_map_user and blk_rq_map_user_iov always do
GFP_KERNEL allocation.
This adds gfp_mask argument to blk_rq_map_user and blk_rq_map_user_iov
so sg can use it (sg always does GFP_ATOMIC allocation).
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Douglas Gilbert <dougg@torque.net>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/blk-map.c')
| -rw-r--r-- | block/blk-map.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/block/blk-map.c b/block/blk-map.c index ea1bf53929e4..ac21b7397e15 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -41,7 +41,8 @@ static int __blk_rq_unmap_user(struct bio *bio) } static int __blk_rq_map_user(struct request_queue *q, struct request *rq, - void __user *ubuf, unsigned int len) + void __user *ubuf, unsigned int len, + gfp_t gfp_mask) { unsigned long uaddr; unsigned int alignment; @@ -57,9 +58,9 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq, uaddr = (unsigned long) ubuf; alignment = queue_dma_alignment(q) | q->dma_pad_mask; if (!(uaddr & alignment) && !(len & alignment)) - bio = bio_map_user(q, NULL, uaddr, len, reading); + bio = bio_map_user(q, NULL, uaddr, len, reading, gfp_mask); else - bio = bio_copy_user(q, uaddr, len, reading); + bio = bio_copy_user(q, uaddr, len, reading, gfp_mask); if (IS_ERR(bio)) return PTR_ERR(bio); @@ -90,6 +91,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq, * @rq: request structure to fill * @ubuf: the user buffer * @len: length of user data + * @gfp_mask: memory allocation flags * * Description: * Data will be mapped directly for zero copy I/O, if possible. Otherwise @@ -105,7 +107,7 @@ static int __blk_rq_map_user(struct request_queue *q, struct request *rq, * unmapping. */ int blk_rq_map_user(struct request_queue *q, struct request *rq, - void __user *ubuf, unsigned long len) + void __user *ubuf, unsigned long len, gfp_t gfp_mask) { unsigned long bytes_read = 0; struct bio *bio = NULL; @@ -132,7 +134,7 @@ int blk_rq_map_user(struct request_queue *q, struct request *rq, if (end - start > BIO_MAX_PAGES) map_len -= PAGE_SIZE; - ret = __blk_rq_map_user(q, rq, ubuf, map_len); + ret = __blk_rq_map_user(q, rq, ubuf, map_len, gfp_mask); if (ret < 0) goto unmap_rq; if (!bio) @@ -160,6 +162,7 @@ EXPORT_SYMBOL(blk_rq_map_user); * @iov: pointer to the iovec * @iov_count: number of elements in the iovec * @len: I/O byte count + * @gfp_mask: memory allocation flags * * Description: * Data will be mapped directly for zero copy I/O, if possible. Otherwise @@ -175,7 +178,8 @@ EXPORT_SYMBOL(blk_rq_map_user); * unmapping. */ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, - struct sg_iovec *iov, int iov_count, unsigned int len) + struct sg_iovec *iov, int iov_count, unsigned int len, + gfp_t gfp_mask) { struct bio *bio; int i, read = rq_data_dir(rq) == READ; @@ -194,9 +198,9 @@ int blk_rq_map_user_iov(struct request_queue *q, struct request *rq, } if (unaligned || (q->dma_pad_mask & len)) - bio = bio_copy_user_iov(q, iov, iov_count, read); + bio = bio_copy_user_iov(q, iov, iov_count, read, gfp_mask); else - bio = bio_map_user_iov(q, NULL, iov, iov_count, read); + bio = bio_map_user_iov(q, NULL, iov, iov_count, read, gfp_mask); if (IS_ERR(bio)) return PTR_ERR(bio); |