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authorAl Viro <viro@zeniv.linux.org.uk>2015-01-23 09:08:07 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2015-01-29 08:13:11 +0300
commit05afcb77eb4713f46e7ebaa3cb54bc465c5d516e (patch)
treefeeafbb29a9a41fb7d85ff55fdb624eaa918907f /mm
parent26bc420b59a38e4e6685a73345a0def461136dce (diff)
downloadlinux-05afcb77eb4713f46e7ebaa3cb54bc465c5d516e.tar.xz
new helper: iov_iter_bvec()
similar to iov_iter_kvec(), for ITER_BVEC ones Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'mm')
-rw-r--r--mm/iov_iter.c17
-rw-r--r--mm/page_io.c9
2 files changed, 17 insertions, 9 deletions
diff --git a/mm/iov_iter.c b/mm/iov_iter.c
index a1599ca4ab0e..827732047da1 100644
--- a/mm/iov_iter.c
+++ b/mm/iov_iter.c
@@ -501,18 +501,31 @@ 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,
+ const struct kvec *kvec, unsigned long nr_segs,
size_t count)
{
BUG_ON(!(direction & ITER_KVEC));
i->type = direction;
- i->kvec = (struct kvec *)iov;
+ i->kvec = kvec;
i->nr_segs = nr_segs;
i->iov_offset = 0;
i->count = count;
}
EXPORT_SYMBOL(iov_iter_kvec);
+void iov_iter_bvec(struct iov_iter *i, int direction,
+ const struct bio_vec *bvec, unsigned long nr_segs,
+ size_t count)
+{
+ BUG_ON(!(direction & ITER_BVEC));
+ i->type = direction;
+ i->bvec = bvec;
+ i->nr_segs = nr_segs;
+ i->iov_offset = 0;
+ i->count = count;
+}
+EXPORT_SYMBOL(iov_iter_bvec);
+
unsigned long iov_iter_alignment(const struct iov_iter *i)
{
unsigned long res = 0;
diff --git a/mm/page_io.c b/mm/page_io.c
index 955db8b0d497..e6045804c8d8 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -269,14 +269,9 @@ int __swap_writepage(struct page *page, struct writeback_control *wbc,
.bv_len = PAGE_SIZE,
.bv_offset = 0
};
- struct iov_iter from = {
- .type = ITER_BVEC | WRITE,
- .count = PAGE_SIZE,
- .iov_offset = 0,
- .nr_segs = 1,
- };
- from.bvec = &bv; /* older gcc versions are broken */
+ struct iov_iter from;
+ iov_iter_bvec(&from, ITER_BVEC | WRITE, &bv, 1, PAGE_SIZE);
init_sync_kiocb(&kiocb, swap_file);
kiocb.ki_pos = page_file_offset(page);
kiocb.ki_nbytes = PAGE_SIZE;