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authorLinus Torvalds <torvalds@linux-foundation.org>2016-05-14 11:59:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-14 11:59:43 -0700
commit6ba5b85fd4b1bd72ba26cb7d50c7580004df68ac (patch)
tree220be21f6f5597e0e864d2efce3b685e914b7a20 /lib
parent1410b74e4061e05a5d2bffb1f99829efce27c8a9 (diff)
parente4d35be584be88a3db3fa5635a97c62a2ec5aafe (diff)
downloadop-kernel-dev-6ba5b85fd4b1bd72ba26cb7d50c7580004df68ac.zip
op-kernel-dev-6ba5b85fd4b1bd72ba26cb7d50c7580004df68ac.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs fixes from Al Viro: "Overlayfs fixes from Miklos, assorted fixes from me. Stable fodder of varying severity, all sat in -next for a while" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: ovl: ignore permissions on underlying lookup vfs: add lookup_hash() helper vfs: rename: check backing inode being equal vfs: add vfs_select_inode() helper get_rock_ridge_filename(): handle malformed NM entries ecryptfs: fix handling of directory opening atomic_open(): fix the handling of create_error fix the copy vs. map logics in blk_rq_map_user_iov() do_splice_to(): cap the size before passing to ->splice_read()
Diffstat (limited to 'lib')
-rw-r--r--lib/iov_iter.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index 5fecddc..ca5316e 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -569,6 +569,25 @@ unsigned long iov_iter_alignment(const struct iov_iter *i)
}
EXPORT_SYMBOL(iov_iter_alignment);
+unsigned long iov_iter_gap_alignment(const struct iov_iter *i)
+{
+ unsigned long res = 0;
+ size_t size = i->count;
+ if (!size)
+ return 0;
+
+ iterate_all_kinds(i, size, v,
+ (res |= (!res ? 0 : (unsigned long)v.iov_base) |
+ (size != v.iov_len ? size : 0), 0),
+ (res |= (!res ? 0 : (unsigned long)v.bv_offset) |
+ (size != v.bv_len ? size : 0)),
+ (res |= (!res ? 0 : (unsigned long)v.iov_base) |
+ (size != v.iov_len ? size : 0))
+ );
+ return res;
+}
+EXPORT_SYMBOL(iov_iter_gap_alignment);
+
ssize_t iov_iter_get_pages(struct iov_iter *i,
struct page **pages, size_t maxsize, unsigned maxpages,
size_t *start)
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