[PATCH] bitops: parisc: use generic bitops

- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove ffz()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove generic_hweight64()
- remove sched_find_first_bit()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()

Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 17 insertions, 277 deletions

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index eca33cfa8a4c..6b3c50964ca9 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -25,6 +25,14 @@ config RWSEM_GENERIC_SPINLOCK
 config RWSEM_XCHGADD_ALGORITHM
         bool
 
+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-parisc/bitops.h b/include/asm-parisc/bitops.h
index ca6119af20af..900561922c4c 100644
--- a/include/asm-parisc/bitops.h
+++ b/include/asm-parisc/bitops.h
@@ -35,13 +35,6 @@ static __inline__ void set_bit(int nr, volatile unsigned long * addr)
         _atomic_spin_unlock_irqrestore(addr, flags);
 }
 
-static __inline__ void __set_bit(unsigned long nr, volatile unsigned long * addr)
-{
-        unsigned long *m = (unsigned long *) addr + (nr >> SHIFT_PER_LONG);
-
-        *m |= 1UL << CHOP_SHIFTCOUNT(nr);
-}
-
 static __inline__ void clear_bit(int nr, volatile unsigned long * addr)
 {
         unsigned long mask = ~(1UL << CHOP_SHIFTCOUNT(nr));
@@ -53,13 +46,6 @@ static __inline__ void clear_bit(int nr, volatile unsigned long * addr)
         _atomic_spin_unlock_irqrestore(addr, flags);
 }
 
-static __inline__ void __clear_bit(unsigned long nr, volatile unsigned long * addr)
-{
-        unsigned long *m = (unsigned long *) addr + (nr >> SHIFT_PER_LONG);
-
-        *m &= ~(1UL << CHOP_SHIFTCOUNT(nr));
-}
-
 static __inline__ void change_bit(int nr, volatile unsigned long * addr)
 {
         unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
@@ -71,13 +57,6 @@ static __inline__ void change_bit(int nr, volatile unsigned long * addr)
         _atomic_spin_unlock_irqrestore(addr, flags);
 }
 
-static __inline__ void __change_bit(unsigned long nr, volatile unsigned long * addr)
-{
-        unsigned long *m = (unsigned long *) addr + (nr >> SHIFT_PER_LONG);
-
-        *m ^= 1UL << CHOP_SHIFTCOUNT(nr);
-}
-
 static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr)
 {
         unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
@@ -93,18 +72,6 @@ static __inline__ int test_and_set_bit(int nr, volatile unsigned long * addr)
         return (oldbit & mask) ? 1 : 0;
 }
 
-static __inline__ int __test_and_set_bit(int nr, volatile unsigned long * address)
-{
-        unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
-        unsigned long oldbit;
-        unsigned long *addr = (unsigned long *)address + (nr >> SHIFT_PER_LONG);
-
-        oldbit = *addr;
-        *addr = oldbit | mask;
-
-        return (oldbit & mask) ? 1 : 0;
-}
-
 static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr)
 {
         unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
@@ -120,18 +87,6 @@ static __inline__ int test_and_clear_bit(int nr, volatile unsigned long * addr)
         return (oldbit & mask) ? 1 : 0;
 }
 
-static __inline__ int __test_and_clear_bit(int nr, volatile unsigned long * address)
-{
-        unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
-        unsigned long *addr = (unsigned long *)address + (nr >> SHIFT_PER_LONG);
-        unsigned long oldbit;
-
-        oldbit = *addr;
-        *addr = oldbit & ~mask;
-
-        return (oldbit & mask) ? 1 : 0;
-}
-
 static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
 {
         unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
@@ -147,25 +102,7 @@ static __inline__ int test_and_change_bit(int nr, volatile unsigned long * addr)
         return (oldbit & mask) ? 1 : 0;
 }
 
-static __inline__ int __test_and_change_bit(int nr, volatile unsigned long * address)
-{
-        unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
-        unsigned long *addr = (unsigned long *)address + (nr >> SHIFT_PER_LONG);
-        unsigned long oldbit;
-
-        oldbit = *addr;
-        *addr = oldbit ^ mask;
-
-        return (oldbit & mask) ? 1 : 0;
-}
-
-static __inline__ int test_bit(int nr, const volatile unsigned long *address)
-{
-        unsigned long mask = 1UL << CHOP_SHIFTCOUNT(nr);
-        const unsigned long *addr = (const unsigned long *)address + (nr >> SHIFT_PER_LONG);
-        
-        return !!(*addr & mask);
-}
+#include <asm-generic/bitops/non-atomic.h>
 
 #ifdef __KERNEL__
 
@@ -219,8 +156,7 @@ static __inline__ unsigned long __ffs(unsigned long x)
         return ret;
 }
 
-/* Undefined if no bit is zero. */
-#define ffz(x)  __ffs(~(x))
+#include <asm-generic/bitops/ffz.h>
 
 /*
  * ffs: find first bit set. returns 1 to BITS_PER_LONG or 0 (if none set)
@@ -263,155 +199,22 @@ static __inline__ int fls(int x)
 
         return ret;
 }
-#define fls64(x)   generic_fls64(x)
 
-/*
- * hweightN: returns the hamming weight (i.e. the number
- * of bits set) of a N-bit word
- */
-#define hweight64(x) generic_hweight64(x)
-#define hweight32(x) generic_hweight32(x)
-#define hweight16(x) generic_hweight16(x)
-#define hweight8(x) generic_hweight8(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)
-{
-#ifdef __LP64__
-        if (unlikely(b[0]))
-                return __ffs(b[0]);
-        if (unlikely(b[1]))
-                return __ffs(b[1]) + 64;
-        return __ffs(b[2]) + 128;
-#else
-        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;
-#endif
-}
+#include <asm-generic/bitops/fls64.h>
+#include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/sched.h>
 
 #endif /* __KERNEL__ */
 
-/*
- * This implementation of find_{first,next}_zero_bit was stolen from
- * Linus' asm-alpha/bitops.h.
- */
-#define find_first_zero_bit(addr, size) \
-        find_next_zero_bit((addr), (size), 0)
-
-static __inline__ unsigned long find_next_zero_bit(const void * addr, unsigned long size, unsigned long offset)
-{
-        const unsigned long * p = ((unsigned long *) addr) + (offset >> SHIFT_PER_LONG);
-        unsigned long result = offset & ~(BITS_PER_LONG-1);
-        unsigned long tmp;
-
-        if (offset >= size)
-                return size;
-        size -= result;
-        offset &= (BITS_PER_LONG-1);
-        if (offset) {
-                tmp = *(p++);
-                tmp |= ~0UL >> (BITS_PER_LONG-offset);
-                if (size < BITS_PER_LONG)
-                        goto found_first;
-                if (~tmp)
-                        goto found_middle;
-                size -= BITS_PER_LONG;
-                result += BITS_PER_LONG;
-        }
-        while (size & ~(BITS_PER_LONG -1)) {
-                if (~(tmp = *(p++)))
-                        goto found_middle;
-                result += BITS_PER_LONG;
-                size -= BITS_PER_LONG;
-        }
-        if (!size)
-                return result;
-        tmp = *p;
-found_first:
-        tmp |= ~0UL << size;
-found_middle:
-        return result + ffz(tmp);
-}
-
-static __inline__ unsigned long find_next_bit(const unsigned long *addr, unsigned long size, unsigned long offset)
-{
-        const unsigned long *p = addr + (offset >> SHIFT_PER_LONG);
-        unsigned long result = offset & ~(BITS_PER_LONG-1);
-        unsigned long tmp;
-
-        if (offset >= size)
-                return size;
-        size -= result;
-        offset &= (BITS_PER_LONG-1);
-        if (offset) {
-                tmp = *(p++);
-                tmp &= (~0UL << offset);
-                if (size < BITS_PER_LONG)
-                        goto found_first;
-                if (tmp)
-                        goto found_middle;
-                size -= BITS_PER_LONG;
-                result += BITS_PER_LONG;
-        }
-        while (size & ~(BITS_PER_LONG-1)) {
-                if ((tmp = *(p++)))
-                        goto found_middle;
-                result += BITS_PER_LONG;
-                size -= BITS_PER_LONG;
-        }
-        if (!size)
-                return result;
-        tmp = *p;
-
-found_first:
-        tmp &= (~0UL >> (BITS_PER_LONG - size));
-        if (tmp == 0UL)        /* Are any bits set? */
-                return result + size; /* Nope. */
-found_middle:
-        return result + __ffs(tmp);
-}
-
-/**
- * find_first_bit - find the first set bit in a memory region
- * @addr: The address to start the search at
- * @size: The maximum size to search
- *
- * Returns the bit-number of the first set bit, not the number of the byte
- * containing a bit.
- */
-#define find_first_bit(addr, size) \
-        find_next_bit((addr), (size), 0)
-
-#define _EXT2_HAVE_ASM_BITOPS_
+#include <asm-generic/bitops/find.h>
 
 #ifdef __KERNEL__
-/*
- * test_and_{set,clear}_bit guarantee atomicity without
- * disabling interrupts.
- */
+
+#include <asm-generic/bitops/ext2-non-atomic.h>
 
 /* '3' is bits per byte */
 #define LE_BYTE_ADDR ((sizeof(unsigned long) - 1) << 3)
 
-#define ext2_test_bit(nr, addr) \
-                        test_bit((nr)   ^ LE_BYTE_ADDR, (unsigned long *)addr)
-#define ext2_set_bit(nr, addr)  \
-                __test_and_set_bit((nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
-#define ext2_clear_bit(nr, addr) \
-                __test_and_clear_bit((nr) ^ LE_BYTE_ADDR, (unsigned long *)addr)
-
 #define ext2_set_bit_atomic(l,nr,addr) \
                 test_and_set_bit((nr)   ^ LE_BYTE_ADDR, (unsigned long *)addr)
 #define ext2_clear_bit_atomic(l,nr,addr) \
@@ -419,77 +222,6 @@ found_middle:
 
 #endif  /* __KERNEL__ */
 
-
-#define ext2_find_first_zero_bit(addr, size) \
-        ext2_find_next_zero_bit((addr), (size), 0)
-
-/* include/linux/byteorder does not support "unsigned long" type */
-static inline unsigned long ext2_swabp(unsigned long * x)
-{
-#ifdef __LP64__
-        return (unsigned long) __swab64p((u64 *) x);
-#else
-        return (unsigned long) __swab32p((u32 *) x);
-#endif
-}
-
-/* include/linux/byteorder doesn't support "unsigned long" type */
-static inline unsigned long ext2_swab(unsigned long y)
-{
-#ifdef __LP64__
-        return (unsigned long) __swab64((u64) y);
-#else
-        return (unsigned long) __swab32((u32) y);
-#endif
-}
-
-static __inline__ unsigned long ext2_find_next_zero_bit(void *addr, unsigned long size, unsigned long offset)
-{
-        unsigned long *p = (unsigned long *) addr + (offset >> SHIFT_PER_LONG);
-        unsigned long result = offset & ~(BITS_PER_LONG - 1);
-        unsigned long tmp;
-
-        if (offset >= size)
-                return size;
-        size -= result;
-        offset &= (BITS_PER_LONG - 1UL);
-        if (offset) {
-                tmp = ext2_swabp(p++);
-                tmp |= (~0UL >> (BITS_PER_LONG - offset));
-                if (size < BITS_PER_LONG)
-                        goto found_first;
-                if (~tmp)
-                        goto found_middle;
-                size -= BITS_PER_LONG;
-                result += BITS_PER_LONG;
-        }
-
-        while (size & ~(BITS_PER_LONG - 1)) {
-                if (~(tmp = *(p++)))
-                        goto found_middle_swap;
-                result += BITS_PER_LONG;
-                size -= BITS_PER_LONG;
-        }
-        if (!size)
-                return result;
-        tmp = ext2_swabp(p);
-found_first:
-        tmp |= ~0UL << size;
-        if (tmp == ~0UL)        /* Are any bits zero? */
-                return result + size; /* Nope. Skip ffz */
-found_middle:
-        return result + ffz(tmp);
-
-found_middle_swap:
-        return result + ffz(ext2_swab(tmp));
-}
-
-
-/* Bitmap functions for the minix filesystem.  */
-#define minix_test_and_set_bit(nr,addr) ext2_set_bit(nr,addr)
-#define minix_set_bit(nr,addr) ((void)ext2_set_bit(nr,addr))
-#define minix_test_and_clear_bit(nr,addr) ext2_clear_bit(nr,addr)
-#define minix_test_bit(nr,addr) ext2_test_bit(nr,addr)
-#define minix_find_first_zero_bit(addr,size) ext2_find_first_zero_bit(addr,size)
+#include <asm-generic/bitops/minix-le.h>
 
 #endif /* _PARISC_BITOPS_H */