---

yaml --- r: 319932 b: refs/heads/master c: 6017b48 h: refs/heads/master v: v3
git-mirror · Jul 31, 2012 · f63767a · f63767a
1 parent f148c75
commit f63767a
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Showing 2 changed files with 2 additions and 9 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 10d470849a7c6dd360e8ad4770160ad7af9adb4b
+refs/heads/master: 6017b485caeae5915956190b4f3d8307021e785d
diff --git a/trunk/fs/ext4/bitmap.c b/trunk/fs/ext4/bitmap.c
@@ -11,16 +11,9 @@
 #include <linux/jbd2.h>
 #include "ext4.h"
 
-static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
-
 unsigned int ext4_count_free(char *bitmap, unsigned int numchars)
 {
-	unsigned int i, sum = 0;
-
-	for (i = 0; i < numchars; i++)
-		sum += nibblemap[bitmap[i] & 0xf] +
-			nibblemap[(bitmap[i] >> 4) & 0xf];
-	return sum;
+	return numchars * BITS_PER_BYTE - memweight(bitmap, numchars);
 }
 
 int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,