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authorAlberto Bertogli <albertito@blitiri.com.ar>2009-11-02 11:39:42 +0100
committerJens Axboe <jens.axboe@oracle.com>2009-11-02 11:41:13 +0100
commit5f04eeb8a76521dec371ceb05e8263889a8af2bc (patch)
treeec69a41f4e6258994aee7720bdee645ad569bc73 /fs/bio.c
parentad0bf11070ebb3c95f8ce82e6219dbd79c8e8b69 (diff)
downloadop-kernel-dev-5f04eeb8a76521dec371ceb05e8263889a8af2bc.zip
op-kernel-dev-5f04eeb8a76521dec371ceb05e8263889a8af2bc.tar.gz
Fix bio_alloc() and bio_kmalloc() documentation
Commit 451a9ebf accidentally broke bio_alloc() and bio_kmalloc() comments by (almost) swapping them. This patch fixes that, by placing the comments in the right place. Signed-off-by: Alberto Bertogli <albertito@blitiri.com.ar> Acked-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'fs/bio.c')
-rw-r--r--fs/bio.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/fs/bio.c b/fs/bio.c
index bcab9e9..12da5db 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -325,8 +325,16 @@ static void bio_fs_destructor(struct bio *bio)
* @gfp_mask: allocation mask to use
* @nr_iovecs: number of iovecs
*
- * Allocate a new bio with @nr_iovecs bvecs. If @gfp_mask
- * contains __GFP_WAIT, the allocation is guaranteed to succeed.
+ * bio_alloc will allocate a bio and associated bio_vec array that can hold
+ * at least @nr_iovecs entries. Allocations will be done from the
+ * fs_bio_set. Also see @bio_alloc_bioset and @bio_kmalloc.
+ *
+ * If %__GFP_WAIT is set, then bio_alloc will always be able to allocate
+ * a bio. This is due to the mempool guarantees. To make this work, callers
+ * must never allocate more than 1 bio at a time from this pool. Callers
+ * that need to allocate more than 1 bio must always submit the previously
+ * allocated bio for IO before attempting to allocate a new one. Failure to
+ * do so can cause livelocks under memory pressure.
*
* RETURNS:
* Pointer to new bio on success, NULL on failure.
@@ -350,21 +358,13 @@ static void bio_kmalloc_destructor(struct bio *bio)
}
/**
- * bio_alloc - allocate a bio for I/O
+ * bio_kmalloc - allocate a bio for I/O using kmalloc()
* @gfp_mask: the GFP_ mask given to the slab allocator
* @nr_iovecs: number of iovecs to pre-allocate
*
* Description:
- * bio_alloc will allocate a bio and associated bio_vec array that can hold
- * at least @nr_iovecs entries. Allocations will be done from the
- * fs_bio_set. Also see @bio_alloc_bioset.
- *
- * If %__GFP_WAIT is set, then bio_alloc will always be able to allocate
- * a bio. This is due to the mempool guarantees. To make this work, callers
- * must never allocate more than 1 bio at a time from this pool. Callers
- * that need to allocate more than 1 bio must always submit the previously
- * allocated bio for IO before attempting to allocate a new one. Failure to
- * do so can cause livelocks under memory pressure.
+ * Allocate a new bio with @nr_iovecs bvecs. If @gfp_mask contains
+ * %__GFP_WAIT, the allocation is guaranteed to succeed.
*
**/
struct bio *bio_kmalloc(gfp_t gfp_mask, int nr_iovecs)
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