From ecd0afa3ced0ebf36901b53fd9ee431f8a34a161 Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Mon, 30 Jul 2012 14:41:05 -0700 Subject: ext2: use memweight() Convert ext2_count_free() to use memweight() instead of table lookup based counting clear bits implementation. This change only affects the code segments enabled by EXT2FS_DEBUG. Note that this memweight() call can't be replaced with a single bitmap_weight() call, although the pointer to the memory area is aligned to long-word boundary. Because the size of the memory area may not be a multiple of BITS_PER_LONG, then it returns wrong value on big-endian architecture. This also includes the following changes. - Remove unnecessary map == NULL check in ext2_count_free() which always takes non-null pointer as the memory area. - Fix printk format warning that only reveals with EXT2FS_DEBUG. Signed-off-by: Akinobu Mita Acked-by: Jan Kara Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/ext2/ialloc.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ext2/ialloc.c') diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c index c13eb7b91a1..8f370e012e6 100644 --- a/fs/ext2/ialloc.c +++ b/fs/ext2/ialloc.c @@ -644,6 +644,7 @@ unsigned long ext2_count_free_inodes (struct super_block * sb) } brelse(bitmap_bh); printk("ext2_count_free_inodes: stored = %lu, computed = %lu, %lu\n", + (unsigned long) percpu_counter_read(&EXT2_SB(sb)->s_freeinodes_counter), desc_count, bitmap_count); return desc_count; -- cgit v1.2.3