Messages in this thread Patch in this message | | | From | Akinobu Mita <> | Subject | [PATCH -mm] hpfs: Use bitmap_weight() | Date | Mon, 16 Nov 2009 12:06:59 +0900 |
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Use bitmap_weight instead of doing hweight32 for each 32bit in bitmap.
This patch applies on top of hpfs-use-hweight32.patch in -mm
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz> Cc: Al Viro <viro@zeniv.linux.org.uk> --- fs/hpfs/super.c | 14 ++++++++------ 1 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c index cf6fe4a..cadc4ce 100644 --- a/fs/hpfs/super.c +++ b/fs/hpfs/super.c @@ -14,6 +14,7 @@ #include <linux/magic.h> #include <linux/sched.h> #include <linux/smp_lock.h> +#include <linux/bitmap.h> /* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */ @@ -115,12 +116,13 @@ static void hpfs_put_super(struct super_block *s) unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno) { struct quad_buffer_head qbh; - unsigned *bits; - unsigned i, count; - if (!(bits = hpfs_map_4sectors(s, secno, &qbh, 4))) return 0; - count = 0; - for (i = 0; i < 2048 / sizeof(unsigned); i++) - count += hweight32(bits[i]); + unsigned long *bits; + unsigned count; + + bits = hpfs_map_4sectors(s, secno, &qbh, 4); + if (!bits) + return 0; + count = bitmap_weight(bits, 2048 * BITS_PER_BYTE); hpfs_brelse4(&qbh); return count; } -- 1.6.5.1
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