summaryrefslogtreecommitdiffstats
path: root/fs/bio.c
diff options
context:
space:
mode:
authorHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2009-12-14 19:23:03 +0100
committerHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2009-12-14 19:23:03 +0100
commit559300bc0ef7ccd541656f1189d38e7088389559 (patch)
treecd1682881ca4246e9c5a1e8632be4bdd9d9706c6 /fs/bio.c
parent5416bf33f92a4104dbcd6062bf377c8421ca3cfd (diff)
parent22763c5cf3690a681551162c15d34d935308c8d7 (diff)
downloadlinux-559300bc0ef7ccd541656f1189d38e7088389559.tar.bz2
Merge commit 'v2.6.32'
Conflicts: arch/avr32/mach-at32ap/include/mach/cpu.h
Diffstat (limited to 'fs/bio.c')
-rw-r--r--fs/bio.c28
1 files changed, 14 insertions, 14 deletions
diff --git a/fs/bio.c b/fs/bio.c
index 402cb84a92a1..12da5db8682c 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)
@@ -407,7 +407,7 @@ EXPORT_SYMBOL(zero_fill_bio);
*
* Description:
* Put a reference to a &struct bio, either one you have gotten with
- * bio_alloc or bio_get. The last put of a bio will free it.
+ * bio_alloc, bio_get or bio_clone. The last put of a bio will free it.
**/
void bio_put(struct bio *bio)
{