[patch 37/44] v850: use generic bitops

Akinobu Mita
2006-02-01T09:04:10Z

[-- Attachment #1: v850.patch --]
[-- Type: text/plain, Size: 6120 bytes --]

- 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>
include/asm-v850/bitops.h | 222 ++--------------------------------------------
1 files changed, 12 insertions(+), 210 deletions(-)

Index: 2.6-git/include/asm-v850/bitops.h
===================================================================
--- 2.6-git.orig/include/asm-v850/bitops.h
+++ 2.6-git/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, co
#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__ */

--