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authorFabian Frederick <fabf@skynet.be>2014-05-20 18:50:16 +0200
committerJan Kara <jack@suse.cz>2014-05-21 10:26:13 +0200
commit770901cc1352b46f0e2de08260ec40c0364d7723 (patch)
tree6f6826ca0773a7dfb765a29efacdef204316fe46 /fs/jbd
parentreiserfs: remove obsolete __constant_cpu_to_le32 (diff)
downloadlinux-dev-770901cc1352b46f0e2de08260ec40c0364d7723.tar.xz
linux-dev-770901cc1352b46f0e2de08260ec40c0364d7723.zip
fs/jbd/revoke.c: replace shift loop by ilog2
journal_init_revoke_table is only called with positive hash_size (JOURNAL_REVOKE_DEFAULT_HASH) so we can replace loop shift by ilog2 Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jan Kara <jack@suse.cz> Cc: Joe Perches <joe@perches.com> Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/jbd')
-rw-r--r--fs/jbd/revoke.c12
1 files changed, 4 insertions, 8 deletions
diff --git a/fs/jbd/revoke.c b/fs/jbd/revoke.c
index 25c713e7071c..8898bbd2b61e 100644
--- a/fs/jbd/revoke.c
+++ b/fs/jbd/revoke.c
@@ -231,19 +231,15 @@ record_cache_failure:
static struct jbd_revoke_table_s *journal_init_revoke_table(int hash_size)
{
- int shift = 0;
- int tmp = hash_size;
+ int i;
struct jbd_revoke_table_s *table;
table = kmem_cache_alloc(revoke_table_cache, GFP_KERNEL);
if (!table)
goto out;
- while((tmp >>= 1UL) != 0UL)
- shift++;
-
table->hash_size = hash_size;
- table->hash_shift = shift;
+ table->hash_shift = ilog2(hash_size);
table->hash_table =
kmalloc(hash_size * sizeof(struct list_head), GFP_KERNEL);
if (!table->hash_table) {
@@ -252,8 +248,8 @@ static struct jbd_revoke_table_s *journal_init_revoke_table(int hash_size)
goto out;
}
- for (tmp = 0; tmp < hash_size; tmp++)
- INIT_LIST_HEAD(&table->hash_table[tmp]);
+ for (i = 0; i < hash_size; i++)
+ INIT_LIST_HEAD(&table->hash_table[i]);
out:
return table;