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| author | David Sterba <dsterba@suse.cz> | 2014-06-05 01:59:57 +0200 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-09-17 13:37:17 -0700 |
| commit | ed6078f70335f158ca79790a0d0708ce558a6e9a (patch) | |
| tree | 636322e2a1e25f7db9f5982204a8fa4bc1bf9cbf /fs/btrfs/zlib.c | |
| parent | 4e54b17ad67a2d0d59bda6edcf725dc5b281c253 (diff) | |
| download | blackbird-obmc-linux-ed6078f70335f158ca79790a0d0708ce558a6e9a.tar.gz blackbird-obmc-linux-ed6078f70335f158ca79790a0d0708ce558a6e9a.zip | |
btrfs: use DIV_ROUND_UP instead of open-coded variants
The form
(value + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT
is equivalent to
(value + PAGE_CACHE_SIZE - 1) / PAGE_CACHE_SIZE
The rest is a simple subsitution, no difference in the generated
assembly code.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/zlib.c')
| -rw-r--r-- | fs/btrfs/zlib.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c index b67d8fc81277..77a0e5dba818 100644 --- a/fs/btrfs/zlib.c +++ b/fs/btrfs/zlib.c @@ -225,8 +225,7 @@ static int zlib_decompress_biovec(struct list_head *ws, struct page **pages_in, size_t total_out = 0; unsigned long page_in_index = 0; unsigned long page_out_index = 0; - unsigned long total_pages_in = (srclen + PAGE_CACHE_SIZE - 1) / - PAGE_CACHE_SIZE; + unsigned long total_pages_in = DIV_ROUND_UP(srclen, PAGE_CACHE_SIZE); unsigned long buf_start; unsigned long pg_offset; |
