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authorChristoph Lameter <clameter@sgi.com>2008-02-27 14:07:10 -0500
committerChristoph Lameter <clameter@sgi.com>2008-02-27 14:07:10 -0500
commit9ef64cb4320df821638b508f79aa8b858cca99f0 (patch)
tree4efbf0854234f89c6f4413077ec795fc669b5b0a /fs/xfs/xfs_bit.h
parent6f157c1d268d5888ca44c589dccd01729c4172f6 (diff)
parent7704a8b6fc4a8f51599eb2af4dcf1e2ac9c7e576 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'fs/xfs/xfs_bit.h')
-rw-r--r--fs/xfs/xfs_bit.h27
1 files changed, 5 insertions, 22 deletions
diff --git a/fs/xfs/xfs_bit.h b/fs/xfs/xfs_bit.h
index 325a007dec91..082641a9782c 100644
--- a/fs/xfs/xfs_bit.h
+++ b/fs/xfs/xfs_bit.h
@@ -47,30 +47,13 @@ static inline __uint64_t xfs_mask64lo(int n)
47} 47}
48 48
49/* Get high bit set out of 32-bit argument, -1 if none set */ 49/* Get high bit set out of 32-bit argument, -1 if none set */
50static inline int xfs_highbit32(__uint32_t v) 50extern int xfs_highbit32(__uint32_t v);
51{
52 return fls(v) - 1;
53}
54
55/* Get high bit set out of 64-bit argument, -1 if none set */
56static inline int xfs_highbit64(__uint64_t v)
57{
58 return fls64(v) - 1;
59}
60
61/* Get low bit set out of 32-bit argument, -1 if none set */
62static inline int xfs_lowbit32(__uint32_t v)
63{
64 __uint32_t t = v;
65 return (t) ? find_first_bit((unsigned long *)&t, 32) : -1;
66}
67 51
68/* Get low bit set out of 64-bit argument, -1 if none set */ 52/* Get low bit set out of 64-bit argument, -1 if none set */
69static inline int xfs_lowbit64(__uint64_t v) 53extern int xfs_lowbit64(__uint64_t v);
70{ 54
71 __uint64_t t = v; 55/* Get high bit set out of 64-bit argument, -1 if none set */
72 return (t) ? find_first_bit((unsigned long *)&t, 64) : -1; 56extern int xfs_highbit64(__uint64_t);
73}
74 57
75/* Return whether bitmap is empty (1 == empty) */ 58/* Return whether bitmap is empty (1 == empty) */
76extern int xfs_bitmap_empty(uint *map, uint size); 59extern int xfs_bitmap_empty(uint *map, uint size);