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| author | Al Viro <viro@zeniv.linux.org.uk> | 2015-01-23 07:08:07 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2015-01-29 06:13:11 +0100 |
| commit | 05afcb77eb4713f46e7ebaa3cb54bc465c5d516e (patch) | |
| tree | feeafbb29a9a41fb7d85ff55fdb624eaa918907f /mm | |
| parent | Linux 3.19-rc6 (diff) | |
| download | linux-05afcb77eb4713f46e7ebaa3cb54bc465c5d516e.tar.xz linux-05afcb77eb4713f46e7ebaa3cb54bc465c5d516e.zip | |
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.c | 17 | ||||
| -rw-r--r-- | mm/page_io.c | 9 |
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; |