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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-03 23:50:22 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-03 23:50:22 +0300
commit5264406cdb66c7003eb3edf53c9773b1b20611b9 (patch)
treee94f76f64a0b3b45dcb9f9bec85cce2ba78e1221 /include/linux/uio.h
parent200e340f2196d7fd427a5810d06e893b932f145a (diff)
parentdd45ab9dd28c82fc495d98cd9788666fd8d76b99 (diff)
downloadlinux-5264406cdb66c7003eb3edf53c9773b1b20611b9.tar.xz
Merge tag 'pull-work.iov_iter-base' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs iov_iter updates from Al Viro: "Part 1 - isolated cleanups and optimizations. One of the goals is to reduce the overhead of using ->read_iter() and ->write_iter() instead of ->read()/->write(). new_sync_{read,write}() has a surprising amount of overhead, in particular inside iocb_flags(). That's the explanation for the beginning of the series is in this pile; it's not directly iov_iter-related, but it's a part of the same work..." * tag 'pull-work.iov_iter-base' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: first_iovec_segment(): just return address iov_iter: massage calling conventions for first_{iovec,bvec}_segment() iov_iter: first_{iovec,bvec}_segment() - simplify a bit iov_iter: lift dealing with maxpages out of first_{iovec,bvec}_segment() iov_iter_get_pages{,_alloc}(): cap the maxsize with MAX_RW_COUNT iov_iter_bvec_advance(): don't bother with bvec_iter copy_page_{to,from}_iter(): switch iovec variants to generic keep iocb_flags() result cached in struct file iocb: delay evaluation of IS_SYNC(...) until we want to check IOCB_DSYNC struct file: use anonymous union member for rcuhead and llist btrfs: use IOMAP_DIO_NOSYNC teach iomap_dio_rw() to suppress dsync No need of likely/unlikely on calls of check_copy_size()
Diffstat (limited to 'include/linux/uio.h')
-rw-r--r--include/linux/uio.h15
1 files changed, 6 insertions, 9 deletions
diff --git a/include/linux/uio.h b/include/linux/uio.h
index 34ba4a731179..9a2dc496d535 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -156,19 +156,17 @@ static inline size_t copy_folio_to_iter(struct folio *folio, size_t offset,
static __always_inline __must_check
size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i)
{
- if (unlikely(!check_copy_size(addr, bytes, true)))
- return 0;
- else
+ if (check_copy_size(addr, bytes, true))
return _copy_to_iter(addr, bytes, i);
+ return 0;
}
static __always_inline __must_check
size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i)
{
- if (unlikely(!check_copy_size(addr, bytes, false)))
- return 0;
- else
+ if (check_copy_size(addr, bytes, false))
return _copy_from_iter(addr, bytes, i);
+ return 0;
}
static __always_inline __must_check
@@ -184,10 +182,9 @@ bool copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i)
static __always_inline __must_check
size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i)
{
- if (unlikely(!check_copy_size(addr, bytes, false)))
- return 0;
- else
+ if (check_copy_size(addr, bytes, false))
return _copy_from_iter_nocache(addr, bytes, i);
+ return 0;
}
static __always_inline __must_check