hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

ocfs2: use memweight() 

Use memweight to count the total number of bits set in memory area.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Akinobu Mita 2012-07-30 14:41:03 -07:00 committed by Linus Torvalds
parent 9a601396e8
commit a75613ec73
1 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
fs/ocfs2/localalloc.c
View File

@ -784,14 +784,10 @@ bail:
static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc) static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
{ {
int i; u32 count;
u8 *buffer;
u32 count = 0;
struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
buffer = la->la_bitmap; count = memweight(la->la_bitmap, le16_to_cpu(la->la_size));
for (i = 0; i < le16_to_cpu(la->la_size); i++)
count += hweight8(buffer[i]);
trace_ocfs2_local_alloc_count_bits(count); trace_ocfs2_local_alloc_count_bits(count);
return count; return count;