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authorDavid Sterba <dsterba@suse.cz>2015-01-16 17:21:12 +0100
committerDavid Sterba <dsterba@suse.cz>2015-03-03 17:23:57 +0100
commitf8c269d7223f6b63cc5936eb191bc3b170d24342 (patch)
tree2e82cc23da9f436bbb6fde058b3321619f990db2 /fs/btrfs/free-space-cache.c
parent351810c1d2aafa288af61844d877941d516fb031 (diff)
downloadlinux-f8c269d7223f6b63cc5936eb191bc3b170d24342.tar.bz2
btrfs: cleanup 64bit/32bit divs, compile time constants
Switch to div_u64 if the divisor is a numeric constant or sum of sizeof()s. We can remove a few instances of do_div that has the hidden semtantics of changing the 1st argument. Small power-of-two divisors are converted to bitshifts, large values are kept intact for clarity. Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'fs/btrfs/free-space-cache.c')
-rw-r--r--fs/btrfs/free-space-cache.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 96611fed552f..cb84923561e4 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1537,7 +1537,7 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
max_bytes = MAX_CACHE_BYTES_PER_GIG;
else
max_bytes = MAX_CACHE_BYTES_PER_GIG *
- div64_u64(size, 1024 * 1024 * 1024);
+ div_u64(size, 1024 * 1024 * 1024);
/*
* we want to account for 1 more bitmap than what we have so we can make
@@ -1552,14 +1552,14 @@ static void recalculate_thresholds(struct btrfs_free_space_ctl *ctl)
}
/*
- * we want the extent entry threshold to always be at most 1/2 the maxw
+ * we want the extent entry threshold to always be at most 1/2 the max
* bytes we can have, or whatever is less than that.
*/
extent_bytes = max_bytes - bitmap_bytes;
- extent_bytes = min_t(u64, extent_bytes, div64_u64(max_bytes, 2));
+ extent_bytes = min_t(u64, extent_bytes, max_bytes >> 1);
ctl->extents_thresh =
- div64_u64(extent_bytes, (sizeof(struct btrfs_free_space)));
+ div_u64(extent_bytes, sizeof(struct btrfs_free_space));
}
static inline void __bitmap_clear_bits(struct btrfs_free_space_ctl *ctl,