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| author | Chao Yu <chao2.yu@samsung.com> | 2014-07-15 09:38:51 +0800 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2014-07-15 22:40:24 +0200 |
| commit | 3f1be4f9c9dc926c1b96f14f88e91b8b0d1f88fd (patch) | |
| tree | 7d0d45c7d2c57c34baa689d78a4534ce5c14213a /fs | |
| parent | c7ff48212d3ede34aa41842929a5b3ebf8f5ca4d (diff) | |
| download | linux-3f1be4f9c9dc926c1b96f14f88e91b8b0d1f88fd.tar.bz2 | |
udf: avoid redundant memcpy when writing data in ICB
Valid data within i_size in page cache will be copied to ICB cache when we
writeback the page by invoking udf_adinicb_writepage, so the copy in
udf_adinicb_write_end is redundant.
After we remove the copy, it's better to use simple_write_end directly in
udf_adinicb_aops instead of udf_adinicb_write_end.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/udf/file.c | 20 |
1 files changed, 1 insertions, 19 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c index 72b8dae9996f..86c6743ec1fe 100644 --- a/fs/udf/file.c +++ b/fs/udf/file.c @@ -100,24 +100,6 @@ static int udf_adinicb_write_begin(struct file *file, return 0; } -static int udf_adinicb_write_end(struct file *file, - struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *page, void *fsdata) -{ - struct inode *inode = mapping->host; - unsigned offset = pos & (PAGE_CACHE_SIZE - 1); - char *kaddr; - struct udf_inode_info *iinfo = UDF_I(inode); - - kaddr = kmap_atomic(page); - memcpy(iinfo->i_ext.i_data + iinfo->i_lenEAttr + offset, - kaddr + offset, copied); - kunmap_atomic(kaddr); - - return simple_write_end(file, mapping, pos, len, copied, page, fsdata); -} - static ssize_t udf_adinicb_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter, loff_t offset) @@ -130,7 +112,7 @@ const struct address_space_operations udf_adinicb_aops = { .readpage = udf_adinicb_readpage, .writepage = udf_adinicb_writepage, .write_begin = udf_adinicb_write_begin, - .write_end = udf_adinicb_write_end, + .write_end = simple_write_end, .direct_IO = udf_adinicb_direct_IO, }; |