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authorAkinobu Mita <mita@miraclelinux.com>2006-03-26 01:39:41 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-26 08:57:14 -0800
commita58259cddf9f824af27abf8960ed604bee53f7c1 (patch)
tree9282162d83466a9760cc32c3d561ea4109f5f914
parent2d78d4beb64eb07d50665432867971c481192ebf (diff)
[PATCH] bitops: v850: use generic bitops
- remove ffz() - remove find_{next,first}{,_zero}_bit() - remove generic_ffs() - remove generic_fls() - remove generic_fls64() - remove __ffs() - remove sched_find_first_bit() - remove generic_hweight{32,16,8}() - remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit() - remove minix_{test,set,test_and_clear,test,find_first_zero}_bit() Signed-off-by: Akinobu Mita <mita@miraclelinux.com> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/v850/Kconfig6
-rw-r--r--include/asm-v850/bitops.h220
2 files changed, 17 insertions, 209 deletions
diff --git a/arch/v850/Kconfig b/arch/v850/Kconfig
index e7fc3e500342..37ec644603ab 100644
--- a/arch/v850/Kconfig
+++ b/arch/v850/Kconfig
@@ -16,6 +16,12 @@ config RWSEM_GENERIC_SPINLOCK
config RWSEM_XCHGADD_ALGORITHM
bool
default n
+config GENERIC_FIND_NEXT_BIT
+ bool
+ default y
+config GENERIC_HWEIGHT
+ bool
+ default y
config GENERIC_CALIBRATE_DELAY
bool
default y
diff --git a/include/asm-v850/bitops.h b/include/asm-v850/bitops.h
index 44d596e792e7..1f6fd5ab4177 100644
--- a/include/asm-v850/bitops.h
+++ b/include/asm-v850/bitops.h
@@ -22,25 +22,11 @@
#ifdef __KERNEL__
-/*
- * The __ functions are not atomic
- */
+#include <asm-generic/bitops/ffz.h>
/*
- * ffz = Find First Zero in word. Undefined if no zero exists,
- * so code should check against ~0UL first..
+ * The __ functions are not atomic
*/
-static inline unsigned long ffz (unsigned long word)
-{
- unsigned long result = 0;
-
- while (word & 1) {
- result++;
- word >>= 1;
- }
- return result;
-}
-
/* In the following constant-bit-op macros, a "g" constraint is used when
we really need an integer ("i" constraint). This is to avoid
@@ -153,203 +139,19 @@ static inline int __test_bit (int nr, const void *addr)
#define smp_mb__before_clear_bit() barrier ()
#define smp_mb__after_clear_bit() barrier ()
+#include <asm-generic/bitops/ffs.h>
+#include <asm-generic/bitops/fls.h>
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/__ffs.h>
+#include <asm-generic/bitops/find.h>
+#include <asm-generic/bitops/sched.h>
+#include <asm-generic/bitops/hweight.h>
-#define find_first_zero_bit(addr, size) \
- find_next_zero_bit ((addr), (size), 0)
-
-static inline int find_next_zero_bit(const void *addr, int size, int offset)
-{
- unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
- unsigned long result = offset & ~31UL;
- unsigned long tmp;
-
- if (offset >= size)
- return size;
- size -= result;
- offset &= 31UL;
- if (offset) {
- tmp = * (p++);
- tmp |= ~0UL >> (32-offset);
- if (size < 32)
- goto found_first;
- if (~tmp)
- goto found_middle;
- size -= 32;
- result += 32;
- }
- while (size & ~31UL) {
- if (~ (tmp = * (p++)))
- goto found_middle;
- result += 32;
- size -= 32;
- }
- if (!size)
- return result;
- tmp = *p;
-
- found_first:
- tmp |= ~0UL << size;
- found_middle:
- return result + ffz (tmp);
-}
-
-
-/* This is the same as generic_ffs, but we can't use that because it's
- inline and the #include order mucks things up. */
-static inline int generic_ffs_for_find_next_bit(int x)
-{
- int r = 1;
-
- if (!x)
- return 0;
- if (!(x & 0xffff)) {
- x >>= 16;
- r += 16;
- }
- if (!(x & 0xff)) {
- x >>= 8;
- r += 8;
- }
- if (!(x & 0xf)) {
- x >>= 4;
- r += 4;
- }
- if (!(x & 3)) {
- x >>= 2;
- r += 2;
- }
- if (!(x & 1)) {
- x >>= 1;
- r += 1;
- }
- return r;
-}
-
-/*
- * Find next one bit in a bitmap reasonably efficiently.
- */
-static __inline__ unsigned long find_next_bit(const unsigned long *addr,
- unsigned long size, unsigned long offset)
-{
- unsigned int *p = ((unsigned int *) addr) + (offset >> 5);
- unsigned int result = offset & ~31UL;
- unsigned int tmp;
-
- if (offset >= size)
- return size;
- size -= result;
- offset &= 31UL;
- if (offset) {
- tmp = *p++;
- tmp &= ~0UL << offset;
- if (size < 32)
- goto found_first;
- if (tmp)
- goto found_middle;
- size -= 32;
- result += 32;
- }
- while (size >= 32) {
- if ((tmp = *p++) != 0)
- goto found_middle;
- result += 32;
- size -= 32;
- }
- if (!size)
- return result;
- tmp = *p;
-
-found_first:
- tmp &= ~0UL >> (32 - size);
- if (tmp == 0UL) /* Are any bits set? */
- return result + size; /* Nope. */
-found_middle:
- return result + generic_ffs_for_find_next_bit(tmp);
-}
-
-/*
- * find_first_bit - find the first set bit in a memory region
- */
-#define find_first_bit(addr, size) \
- find_next_bit((addr), (size), 0)
-
-
-#define ffs(x) generic_ffs (x)
-#define fls(x) generic_fls (x)
-#define fls64(x) generic_fls64(x)
-#define __ffs(x) ffs(x)
-
-
-/*
- * This is just `generic_ffs' from <linux/bitops.h>, except that it assumes
- * that at least one bit is set, and returns the real index of the bit
- * (rather than the bit index + 1, like ffs does).
- */
-static inline int sched_ffs(int x)
-{
- int r = 0;
-
- if (!(x & 0xffff)) {
- x >>= 16;
- r += 16;
- }
- if (!(x & 0xff)) {
- x >>= 8;
- r += 8;
- }
- if (!(x & 0xf)) {
- x >>= 4;
- r += 4;
- }
- if (!(x & 3)) {
- x >>= 2;
- r += 2;
- }
- if (!(x & 1)) {
- x >>= 1;
- r += 1;
- }
- return r;
-}
-
-/*
- * 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 set.
- */
-static inline int sched_find_first_bit(unsigned long *b)
-{
- unsigned offs = 0;
- while (! *b) {
- b++;
- offs += 32;
- }
- return sched_ffs (*b) + offs;
-}
-
-/*
- * 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)
-
-#define ext2_set_bit __test_and_set_bit
+#include <asm-generic/bitops/ext2-non-atomic.h>
#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
-#define ext2_clear_bit __test_and_clear_bit
#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
-#define ext2_test_bit test_bit
-#define ext2_find_first_zero_bit find_first_zero_bit
-#define ext2_find_next_zero_bit find_next_zero_bit
-/* Bitmap functions for the minix filesystem. */
-#define minix_test_and_set_bit __test_and_set_bit
-#define minix_set_bit __set_bit
-#define minix_test_and_clear_bit __test_and_clear_bit
-#define minix_test_bit test_bit
-#define minix_find_first_zero_bit find_first_zero_bit
+#include <asm-generic/bitops/minix.h>
#endif /* __KERNEL__ */