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btrfs: use DIV_ROUND_UP instead of open-coded variants
authorDavid Sterba <dsterba@suse.cz>
Wed, 4 Jun 2014 23:59:57 +0000 (01:59 +0200)
committerChris Mason <clm@fb.com>
Wed, 17 Sep 2014 20:37:17 +0000 (13:37 -0700)
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>

No differences found
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