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authorAl Viro <viro@zeniv.linux.org.uk>2014-11-24 14:46:11 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2014-12-08 20:25:23 -0500
commitabb78f875f3fcedb88d85eef9f7be7aa474c6727 (patch)
treefc097b375bb4230c1e1f40ec413ee8f0252e2a1f /mm/iov_iter.c
parenta604ec7e9ffea22fed84db8306585090e7a6e85d (diff)
downloadop-kernel-dev-abb78f875f3fcedb88d85eef9f7be7aa474c6727.zip
op-kernel-dev-abb78f875f3fcedb88d85eef9f7be7aa474c6727.tar.gz
new helper: iov_iter_kvec()
initialization of kvec-backed iov_iter Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'mm/iov_iter.c')
-rw-r--r--mm/iov_iter.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/iov_iter.c b/mm/iov_iter.c
index 1d2cdeb..88c052e 100644
--- a/mm/iov_iter.c
+++ b/mm/iov_iter.c
@@ -479,6 +479,19 @@ size_t iov_iter_single_seg_count(const struct iov_iter *i)
}
EXPORT_SYMBOL(iov_iter_single_seg_count);
+void iov_iter_kvec(struct iov_iter *i, int direction,
+ const struct kvec *iov, unsigned long nr_segs,
+ size_t count)
+{
+ BUG_ON(!(direction & ITER_KVEC));
+ i->type = direction;
+ i->kvec = (struct kvec *)iov;
+ i->nr_segs = nr_segs;
+ i->iov_offset = 0;
+ i->count = count;
+}
+EXPORT_SYMBOL(iov_iter_kvec);
+
unsigned long iov_iter_alignment(const struct iov_iter *i)
{
unsigned long res = 0;
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