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authorQu Wenruo <quwenruo@cn.fujitsu.com>2013-02-26 08:10:22 +0000
committerJosef Bacik <jbacik@fusionio.com>2013-02-26 11:04:13 -0500
commitfda2832febb1928da0625b2c5d15559b29d7e740 (patch)
treedac83eff57b657dfc04ba72fa7bcce4b4674b810 /fs/btrfs/volumes.c
parent8c4ce81e911ab6c84e4f75e18d4ceb3fa555c35b (diff)
btrfs: cleanup for open-coded alignment
Though most of the btrfs codes are using ALIGN macro for page alignment, there are still some codes using open-coded alignment like the following: ------ u64 mask = ((u64)root->stripesize - 1); u64 ret = (val + mask) & ~mask; ------ Or even hidden one: ------ num_bytes = (end - start + blocksize) & ~(blocksize - 1); ------ Sometimes these open-coded alignment is not so easy to understand for newbie like me. This commit changes the open-coded alignment to the ALIGN macro for a better readability. Also there is a previous patch from David Sterba with similar changes, but the patch is for 3.2 kernel and seems not merged. http://www.spinics.net/lists/linux-btrfs/msg12747.html Cc: David Sterba <dave@jikos.cz> Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 538c5cfa005f..db72e0cc6f87 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4556,8 +4556,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
num_stripes = 1;
stripe_index = 0;
stripe_nr_orig = stripe_nr;
- stripe_nr_end = (offset + *length + map->stripe_len - 1) &
- (~(map->stripe_len - 1));
+ stripe_nr_end = ALIGN(offset + *length, map->stripe_len);
do_div(stripe_nr_end, map->stripe_len);
stripe_end_offset = stripe_nr_end * map->stripe_len -
(offset + *length);