Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6

[safe/jmp/linux-2.6] / include / asm-m68k / bitops.h

diff --git a/include/asm-m68k/bitops.h b/include/asm-m68k/bitops.h
index 13f4c00..3e81064 100644 (file)
--- a/include/asm-m68k/bitops.h
+++ b/include/asm-m68k/bitops.h
@@ -8,6 +8,10 @@
  * for more details.
  */
 
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
 #include <linux/compiler.h>
 
 /*
@@ -310,36 +314,11 @@ static inline int fls(int x)
 
        return 32 - cnt;
 }
-#define fls64(x)   generic_fls64(x)
-
-/*
- * Every architecture must define this function. It's the fastest
- * way of searching a 140-bit bitmap where the first 100 bits are
- * unlikely to be set. It's guaranteed that at least one of the 140
- * bits is cleared.
- */
-static inline int sched_find_first_bit(const unsigned long *b)
-{
-       if (unlikely(b[0]))
-               return __ffs(b[0]);
-       if (unlikely(b[1]))
-               return __ffs(b[1]) + 32;
-       if (unlikely(b[2]))
-               return __ffs(b[2]) + 64;
-       if (b[3])
-               return __ffs(b[3]) + 96;
-       return __ffs(b[4]) + 128;
-}
 
-
-/*
- * hweightN: returns the hamming weight (i.e. the number
- * of bits set) of a N-bit word
- */
-
-#define hweight32(x) generic_hweight32(x)
-#define hweight16(x) generic_hweight16(x)
-#define hweight8(x) generic_hweight8(x)
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 
 /* Bitmap functions for the minix filesystem */
 
@@ -365,9 +344,9 @@ static inline int minix_find_first_zero_bit(const void *vaddr, unsigned size)
        return ((p - addr) << 4) + (res ^ 31);
 }
 
-#define minix_test_and_set_bit(nr, addr)       test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))
-#define minix_set_bit(nr,addr)                 set_bit((nr) ^ 16, (unsigned long *)(addr))
-#define minix_test_and_clear_bit(nr, addr)     test_and_clear_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_test_and_set_bit(nr, addr)       __test_and_set_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_set_bit(nr,addr)                 __set_bit((nr) ^ 16, (unsigned long *)(addr))
+#define minix_test_and_clear_bit(nr, addr)     __test_and_clear_bit((nr) ^ 16, (unsigned long *)(addr))
 
 static inline int minix_test_bit(int nr, const void *vaddr)
 {
@@ -377,9 +356,9 @@ static inline int minix_test_bit(int nr, const void *vaddr)
 
 /* Bitmap functions for the ext2 filesystem. */
 
-#define ext2_set_bit(nr, addr)                 test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
+#define ext2_set_bit(nr, addr)                 __test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
 #define ext2_set_bit_atomic(lock, nr, addr)    test_and_set_bit((nr) ^ 24, (unsigned long *)(addr))
-#define ext2_clear_bit(nr, addr)               test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))
+#define ext2_clear_bit(nr, addr)               __test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))
 #define ext2_clear_bit_atomic(lock, nr, addr)  test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr))
 
 static inline int ext2_test_bit(int nr, const void *vaddr)
@@ -432,6 +411,49 @@ static inline int ext2_find_next_zero_bit(const void *vaddr, unsigned size,
        return (p - addr) * 32 + res;
 }
 
+static inline int ext2_find_first_bit(const void *vaddr, unsigned size)
+{
+       const unsigned long *p = vaddr, *addr = vaddr;
+       int res;
+
+       if (!size)
+               return 0;
+
+       size = (size >> 5) + ((size & 31) > 0);
+       while (*p++ == 0UL) {
+               if (--size == 0)
+                       return (p - addr) << 5;
+       }
+
+       --p;
+       for (res = 0; res < 32; res++)
+               if (ext2_test_bit(res, p))
+                       break;
+       return (p - addr) * 32 + res;
+}
+
+static inline int ext2_find_next_bit(const void *vaddr, unsigned size,
+                                    unsigned offset)
+{
+       const unsigned long *addr = vaddr;
+       const unsigned long *p = addr + (offset >> 5);
+       int bit = offset & 31UL, res;
+
+       if (offset >= size)
+               return size;
+
+       if (bit) {
+               /* Look for one in first longword */
+               for (res = bit; res < 32; res++)
+                       if (ext2_test_bit(res, p))
+                               return (p - addr) * 32 + res;
+               p++;
+       }
+       /* No set bit yet, search remaining full bytes for a set bit */
+       res = ext2_find_first_bit(p, size - 32 * (p - addr));
+       return (p - addr) * 32 + res;
+}
+
 #endif /* __KERNEL__ */
 
 #endif /* _M68K_BITOPS_H */