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author | Ingo Molnar <mingo@kernel.org> | 2016-05-20 09:09:26 +0200 |
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committer | Ingo Molnar <mingo@kernel.org> | 2016-05-20 09:09:26 +0200 |
commit | 06cd3d8c14bdd06f49f1c6a06acf219749c5598e (patch) | |
tree | b9dd9ad824e489803072b9517dc01c0d75a4f918 /lib/iov_iter.c | |
parent | 0f6ff2bce0d4c3e4ff34f5d2ffb7329025b30844 (diff) | |
parent | bc231d9ede99518b67a77544d9084f15b898fe2e (diff) |
Merge branch 'linus' into x86/urgent, to refresh the tree
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'lib/iov_iter.c')
-rw-r--r-- | lib/iov_iter.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/lib/iov_iter.c b/lib/iov_iter.c index 5fecddc32b1b..ca5316e0087b 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) |