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| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-17 04:46:46 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-17 06:43:56 -0500 |
| commit | 777eda2c5b84d6f3543f4aecbf4cd1f29b222a81 (patch) | |
| tree | 0d007920c70708c178b59051b1fbf34b6e689fb6 | |
| parent | b1bc6d7f163234cad4f34e3f5dffde44b96369eb (diff) | |
| download | linux-777eda2c5b84d6f3543f4aecbf4cd1f29b222a81.tar.bz2 | |
new helper: iter_is_iovec()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | include/linux/uio.h | 5 | ||||
| -rw-r--r-- | mm/filemap.c | 2 | ||||
| -rw-r--r-- | mm/shmem.c | 2 |
3 files changed, 7 insertions, 2 deletions
diff --git a/include/linux/uio.h b/include/linux/uio.h index a41e252396c0..1c5e453f7ea9 100644 --- a/include/linux/uio.h +++ b/include/linux/uio.h @@ -101,6 +101,11 @@ static inline size_t iov_iter_count(struct iov_iter *i) return i->count; } +static inline bool iter_is_iovec(struct iov_iter *i) +{ + return !(i->type & (ITER_BVEC | ITER_KVEC)); +} + /* * Cap the iov_iter by given limit; note that the second argument is * *not* the new size - it's upper limit for such. Passing it a value diff --git a/mm/filemap.c b/mm/filemap.c index e8905bc3cbd7..bd8543c6508f 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -2464,7 +2464,7 @@ ssize_t generic_perform_write(struct file *file, /* * Copies from kernel address space cannot fail (NFSD is a big user). */ - if (segment_eq(get_fs(), KERNEL_DS)) + if (!iter_is_iovec(i)) flags |= AOP_FLAG_UNINTERRUPTIBLE; do { diff --git a/mm/shmem.c b/mm/shmem.c index 185836ba53ef..73ba1df7c8ba 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1536,7 +1536,7 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to) * holes of a sparse file, we actually need to allocate those pages, * and even mark them dirty, so it cannot exceed the max_blocks limit. */ - if (segment_eq(get_fs(), KERNEL_DS)) + if (!iter_is_iovec(to)) sgp = SGP_DIRTY; index = *ppos >> PAGE_CACHE_SHIFT; |