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authorTomi Valkeinen <tomi.valkeinen@ti.com>2012-09-03 09:26:33 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>2012-09-03 09:26:33 +0300
commitc50e86ce7c2961a41f2f7aa6e4fd6c99229ba205 (patch)
tree4ea36009719bd8fc523239fe1bdccb90f0dce3ae /fs/qnx4/bitmap.c
parent14d33d384693eb6083396199de516fdef320f7af (diff)
parent4cbe5a555fa58a79b6ecbb6c531b8bab0650778d (diff)
Merge tag 'v3.6-rc4'
Merge 3.6-rc4 to get latest OMAP and device tree fixes.
Diffstat (limited to 'fs/qnx4/bitmap.c')
-rw-r--r--fs/qnx4/bitmap.c24
1 files changed, 5 insertions, 19 deletions
diff --git a/fs/qnx4/bitmap.c b/fs/qnx4/bitmap.c
index 22e0d60e53e..76a7a697b77 100644
--- a/fs/qnx4/bitmap.c
+++ b/fs/qnx4/bitmap.c
@@ -17,23 +17,6 @@
#include <linux/bitops.h>
#include "qnx4.h"
-static void count_bits(register const char *bmPart, register int size,
- int *const tf)
-{
- char b;
- int tot = *tf;
-
- if (size > QNX4_BLOCK_SIZE) {
- size = QNX4_BLOCK_SIZE;
- }
- do {
- b = *bmPart++;
- tot += 8 - hweight8(b);
- size--;
- } while (size != 0);
- *tf = tot;
-}
-
unsigned long qnx4_count_free_blocks(struct super_block *sb)
{
int start = le32_to_cpu(qnx4_sb(sb)->BitMap->di_first_xtnt.xtnt_blk) - 1;
@@ -44,13 +27,16 @@ unsigned long qnx4_count_free_blocks(struct super_block *sb)
struct buffer_head *bh;
while (total < size) {
+ int bytes = min(size - total, QNX4_BLOCK_SIZE);
+
if ((bh = sb_bread(sb, start + offset)) == NULL) {
printk(KERN_ERR "qnx4: I/O error in counting free blocks\n");
break;
}
- count_bits(bh->b_data, size - total, &total_free);
+ total_free += bytes * BITS_PER_BYTE -
+ memweight(bh->b_data, bytes);
brelse(bh);
- total += QNX4_BLOCK_SIZE;
+ total += bytes;
offset++;
}