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[PATCH] bitops: cris: use generic bitops
- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove generic_fls()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
- remove minix_{test,set,test_and_clear,test,find_first_zero}_bit()
- remove sched_find_first_bit()
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Acked-by: Mikael Starvik <starvik@axis.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Akinobu Mita
Linus Torvalds
parent
d142d86019
commit
e9f26df172
@ -16,6 +16,14 @@ config RWSEM_GENERIC_SPINLOCK
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config RWSEM_XCHGADD_ALGORITHM
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bool
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config GENERIC_FIND_NEXT_BIT
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bool
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default y
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config GENERIC_HWEIGHT
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bool
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default y
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config GENERIC_CALIBRATE_DELAY
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bool
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default y
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@ -39,8 +39,6 @@ struct __dummy { unsigned long a[100]; };
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#define set_bit(nr, addr) (void)test_and_set_bit(nr, addr)
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#define __set_bit(nr, addr) (void)__test_and_set_bit(nr, addr)
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/*
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* clear_bit - Clears a bit in memory
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* @nr: Bit to clear
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@ -54,8 +52,6 @@ struct __dummy { unsigned long a[100]; };
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#define clear_bit(nr, addr) (void)test_and_clear_bit(nr, addr)
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#define __clear_bit(nr, addr) (void)__test_and_clear_bit(nr, addr)
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/*
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* change_bit - Toggle a bit in memory
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* @nr: Bit to change
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@ -68,18 +64,6 @@ struct __dummy { unsigned long a[100]; };
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#define change_bit(nr, addr) (void)test_and_change_bit(nr, addr)
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/*
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* __change_bit - Toggle a bit in memory
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* @nr: the bit to change
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* @addr: the address to start counting from
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*
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* Unlike change_bit(), this function is non-atomic and may be reordered.
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* If it's called on the same region of memory simultaneously, the effect
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* may be that only one operation succeeds.
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*/
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#define __change_bit(nr, addr) (void)__test_and_change_bit(nr, addr)
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/**
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* test_and_set_bit - Set a bit and return its old value
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* @nr: Bit to set
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@ -104,18 +88,6 @@ static inline int test_and_set_bit(int nr, volatile unsigned long *addr)
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return retval;
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}
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static inline int __test_and_set_bit(int nr, volatile unsigned long *addr)
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{
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unsigned int mask, retval;
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unsigned int *adr = (unsigned int *)addr;
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adr += nr >> 5;
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mask = 1 << (nr & 0x1f);
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retval = (mask & *adr) != 0;
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*adr |= mask;
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return retval;
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}
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/*
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* clear_bit() doesn't provide any barrier for the compiler.
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*/
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@ -146,27 +118,6 @@ static inline int test_and_clear_bit(int nr, volatile unsigned long *addr)
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return retval;
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}
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/**
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* __test_and_clear_bit - Clear a bit and return its old value
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* @nr: Bit to clear
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* @addr: Address to count from
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*
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* This operation is non-atomic and can be reordered.
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* If two examples of this operation race, one can appear to succeed
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* but actually fail. You must protect multiple accesses with a lock.
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*/
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static inline int __test_and_clear_bit(int nr, volatile unsigned long *addr)
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{
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unsigned int mask, retval;
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unsigned int *adr = (unsigned int *)addr;
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adr += nr >> 5;
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mask = 1 << (nr & 0x1f);
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retval = (mask & *adr) != 0;
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*adr &= ~mask;
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return retval;
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}
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/**
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* test_and_change_bit - Change a bit and return its old value
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* @nr: Bit to change
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@ -190,42 +141,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr)
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return retval;
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}
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/* WARNING: non atomic and it can be reordered! */
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static inline int __test_and_change_bit(int nr, volatile unsigned long *addr)
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{
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unsigned int mask, retval;
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unsigned int *adr = (unsigned int *)addr;
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adr += nr >> 5;
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mask = 1 << (nr & 0x1f);
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retval = (mask & *adr) != 0;
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*adr ^= mask;
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return retval;
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}
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/**
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* test_bit - Determine whether a bit is set
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* @nr: bit number to test
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* @addr: Address to start counting from
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*
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* This routine doesn't need to be atomic.
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*/
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static inline int test_bit(int nr, const volatile unsigned long *addr)
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{
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unsigned int mask;
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unsigned int *adr = (unsigned int *)addr;
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adr += nr >> 5;
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mask = 1 << (nr & 0x1f);
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return ((mask & *adr) != 0);
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}
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/*
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* Find-bit routines..
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*/
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#include <asm-generic/bitops/non-atomic.h>
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/*
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* Since we define it "external", it collides with the built-in
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@ -234,152 +150,18 @@ static inline int test_bit(int nr, const volatile unsigned long *addr)
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*/
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#define ffs kernel_ffs
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/*
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* fls: find last bit set.
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*/
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#include <asm-generic/bitops/fls.h>
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#include <asm-generic/bitops/fls64.h>
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#include <asm-generic/bitops/hweight.h>
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#include <asm-generic/bitops/find.h>
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#define fls(x) generic_fls(x)
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#define fls64(x) generic_fls64(x)
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#include <asm-generic/bitops/ext2-non-atomic.h>
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/*
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* hweightN - returns the hamming weight of a N-bit word
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* @x: the word to weigh
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*
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* The Hamming Weight of a number is the total number of bits set in it.
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*/
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#define hweight32(x) generic_hweight32(x)
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#define hweight16(x) generic_hweight16(x)
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#define hweight8(x) generic_hweight8(x)
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/**
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* find_next_zero_bit - find the first zero bit in a memory region
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* @addr: The address to base the search on
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* @offset: The bitnumber to start searching at
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* @size: The maximum size to search
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*/
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static inline int find_next_zero_bit (const unsigned long * addr, int size, int offset)
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{
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unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
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unsigned long result = offset & ~31UL;
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unsigned long tmp;
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if (offset >= size)
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return size;
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size -= result;
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offset &= 31UL;
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if (offset) {
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tmp = *(p++);
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tmp |= ~0UL >> (32-offset);
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if (size < 32)
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goto found_first;
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if (~tmp)
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goto found_middle;
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size -= 32;
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result += 32;
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}
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while (size & ~31UL) {
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if (~(tmp = *(p++)))
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goto found_middle;
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result += 32;
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size -= 32;
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}
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if (!size)
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return result;
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tmp = *p;
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found_first:
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tmp |= ~0UL << size;
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found_middle:
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return result + ffz(tmp);
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}
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/**
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* find_next_bit - find the first set bit in a memory region
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* @addr: The address to base the search on
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* @offset: The bitnumber to start searching at
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* @size: The maximum size to search
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*/
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static __inline__ int find_next_bit(const unsigned long *addr, int size, int offset)
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{
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unsigned long *p = ((unsigned long *) addr) + (offset >> 5);
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unsigned long result = offset & ~31UL;
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unsigned long tmp;
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if (offset >= size)
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return size;
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size -= result;
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offset &= 31UL;
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if (offset) {
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tmp = *(p++);
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tmp &= (~0UL << offset);
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if (size < 32)
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goto found_first;
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if (tmp)
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goto found_middle;
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size -= 32;
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result += 32;
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}
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while (size & ~31UL) {
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if ((tmp = *(p++)))
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goto found_middle;
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result += 32;
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size -= 32;
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}
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if (!size)
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return result;
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tmp = *p;
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found_first:
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tmp &= (~0UL >> (32 - size));
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if (tmp == 0UL) /* Are any bits set? */
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return result + size; /* Nope. */
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found_middle:
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return result + __ffs(tmp);
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}
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/**
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* find_first_zero_bit - find the first zero bit in a memory region
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* @addr: The address to start the search at
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* @size: The maximum size to search
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*
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* Returns the bit-number of the first zero bit, not the number of the byte
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* containing a bit.
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*/
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#define find_first_zero_bit(addr, size) \
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find_next_zero_bit((addr), (size), 0)
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#define find_first_bit(addr, size) \
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find_next_bit((addr), (size), 0)
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#define ext2_set_bit __test_and_set_bit
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#define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a)
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#define ext2_clear_bit __test_and_clear_bit
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#define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a)
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#define ext2_test_bit test_bit
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#define ext2_find_first_zero_bit find_first_zero_bit
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#define ext2_find_next_zero_bit find_next_zero_bit
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/* Bitmap functions for the minix filesystem. */
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#define minix_set_bit(nr,addr) __test_and_set_bit(nr,addr)
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#define minix_clear_bit(nr,addr) __test_and_clear_bit(nr,addr)
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#define minix_test_bit(nr,addr) test_bit(nr,addr)
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#define minix_find_first_zero_bit(addr,size) find_first_zero_bit(addr,size)
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static inline int sched_find_first_bit(const unsigned long *b)
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{
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if (unlikely(b[0]))
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return __ffs(b[0]);
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if (unlikely(b[1]))
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return __ffs(b[1]) + 32;
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if (unlikely(b[2]))
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return __ffs(b[2]) + 64;
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if (unlikely(b[3]))
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return __ffs(b[3]) + 96;
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if (b[4])
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return __ffs(b[4]) + 128;
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return __ffs(b[5]) + 32 + 128;
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}
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#include <asm-generic/bitops/minix.h>
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#include <asm-generic/bitops/sched.h>
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#endif /* __KERNEL__ */
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