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| author | Johannes Thumshirn <jthumshirn@suse.de> | 2019-11-26 09:28:47 -0800 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2019-11-26 09:28:47 -0800 |
| commit | 88cfd30e188fcf6fd8304586c936a6f22fb665e5 (patch) | |
| tree | ce91761c343bad36b9b1c26b689167d972f927be /fs/iomap | |
| parent | f550ee9b85fd47f85e31965b908a7c1044c531aa (diff) | |
| download | linux-88cfd30e188fcf6fd8304586c936a6f22fb665e5.tar.gz | |
iomap: remove unneeded variable in iomap_dio_rw()
The 'start' variable indicates the start of a filemap and is set to the iocb's position, which we have already cached as 'pos', upon function entry. 'pos' is used as a cursor indicating the current position and updated later in iomap_dio_rw(), but not before the last use of 'start'. Remove 'start' as it's synonym for 'pos' before we're entering the loop calling iomapp_apply(). Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/iomap')
| -rw-r--r-- | fs/iomap/direct-io.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index b75cd0b0609b..23837926c0c5 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -405,7 +405,7 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, struct address_space *mapping = iocb->ki_filp->f_mapping; struct inode *inode = file_inode(iocb->ki_filp); size_t count = iov_iter_count(iter); - loff_t pos = iocb->ki_pos, start = pos; + loff_t pos = iocb->ki_pos; loff_t end = iocb->ki_pos + count - 1, ret = 0; unsigned int flags = IOMAP_DIRECT; struct blk_plug plug; @@ -461,14 +461,14 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, } if (iocb->ki_flags & IOCB_NOWAIT) { - if (filemap_range_has_page(mapping, start, end)) { + if (filemap_range_has_page(mapping, pos, end)) { ret = -EAGAIN; goto out_free_dio; } flags |= IOMAP_NOWAIT; } - ret = filemap_write_and_wait_range(mapping, start, end); + ret = filemap_write_and_wait_range(mapping, pos, end); if (ret) goto out_free_dio; @@ -479,7 +479,7 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter, * pretty crazy thing to do, so we don't support it 100%. */ ret = invalidate_inode_pages2_range(mapping, - start >> PAGE_SHIFT, end >> PAGE_SHIFT); + pos >> PAGE_SHIFT, end >> PAGE_SHIFT); if (ret) dio_warn_stale_pagecache(iocb->ki_filp); ret = 0; |