xfs: kill some warnings on i386 builds

[safe/jmp/linux-2.6] / fs / xfs / xfs_bit.h

diff --git a/fs/xfs/xfs_bit.h b/fs/xfs/xfs_bit.h
index 0bbe568..f1e3c90 100644 (file)
--- a/fs/xfs/xfs_bit.h
+++ b/fs/xfs/xfs_bit.h
@@ -23,40 +23,57 @@
  */
 
 /*
- * masks with n high/low bits set, 32-bit values & 64-bit values
+ * masks with n high/low bits set, 64-bit values
  */
-#define        XFS_MASK32HI(n)         xfs_mask32hi(n)
-static inline __uint32_t xfs_mask32hi(int n)
-{
-       return (__uint32_t)-1 << (32 - (n));
-}
-#define        XFS_MASK64HI(n)         xfs_mask64hi(n)
 static inline __uint64_t xfs_mask64hi(int n)
 {
        return (__uint64_t)-1 << (64 - (n));
 }
-#define        XFS_MASK32LO(n)         xfs_mask32lo(n)
 static inline __uint32_t xfs_mask32lo(int n)
 {
        return ((__uint32_t)1 << (n)) - 1;
 }
-#define        XFS_MASK64LO(n)         xfs_mask64lo(n)
 static inline __uint64_t xfs_mask64lo(int n)
 {
        return ((__uint64_t)1 << (n)) - 1;
 }
 
 /* Get high bit set out of 32-bit argument, -1 if none set */
-extern int xfs_highbit32(__uint32_t v);
+static inline int xfs_highbit32(__uint32_t v)
+{
+       return fls(v) - 1;
+}
+
+/* Get high bit set out of 64-bit argument, -1 if none set */
+static inline int xfs_highbit64(__uint64_t v)
+{
+       return fls64(v) - 1;
+}
+
+/* Get low bit set out of 32-bit argument, -1 if none set */
+static inline int xfs_lowbit32(__uint32_t v)
+{
+       return ffs(v) - 1;
+}
 
 /* Get low bit set out of 64-bit argument, -1 if none set */
-extern int xfs_lowbit64(__uint64_t v);
+static inline int xfs_lowbit64(__uint64_t v)
+{
+       __uint32_t      w = (__uint32_t)v;
+       int             n = 0;
 
-/* Get high bit set out of 64-bit argument, -1 if none set */
-extern int xfs_highbit64(__uint64_t);
+       if (w) {        /* lower bits */
+               n = ffs(w);
+       } else {        /* upper bits */
+               w = (__uint32_t)(v >> 32);
+               if (w && (n = ffs(w)))
+               n += 32;
+       }
+       return n - 1;
+}
 
-/* Count set bits in map starting with start_bit */
-extern int xfs_count_bits(uint *map, uint size, uint start_bit);
+/* Return whether bitmap is empty (1 == empty) */
+extern int xfs_bitmap_empty(uint *map, uint size);
 
 /* Count continuous one bits in map starting with start_bit */
 extern int xfs_contig_bits(uint *map, uint size, uint start_bit);