![Akinobu Mita](/assets/img/avatar_default.png)
This patch introduces the C-language equivalents of the functions below: int ext2_set_bit(int nr, volatile unsigned long *addr); int ext2_clear_bit(int nr, volatile unsigned long *addr); int ext2_test_bit(int nr, const volatile unsigned long *addr); unsigned long ext2_find_first_zero_bit(const unsigned long *addr, unsigned long size); unsinged long ext2_find_next_zero_bit(const unsigned long *addr, unsigned long size); In include/asm-generic/bitops/ext2-non-atomic.h This code largely copied from: include/asm-powerpc/bitops.h include/asm-parisc/bitops.h Signed-off-by: Akinobu Mita <mita@miraclelinux.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
#ifndef _ASM_GENERIC_BITOPS_LE_H_
|
|
#define _ASM_GENERIC_BITOPS_LE_H_
|
|
|
|
#include <asm/types.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
|
|
#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
|
|
|
|
#if defined(__LITTLE_ENDIAN)
|
|
|
|
#define generic_test_le_bit(nr, addr) test_bit(nr, addr)
|
|
#define generic___set_le_bit(nr, addr) __set_bit(nr, addr)
|
|
#define generic___clear_le_bit(nr, addr) __clear_bit(nr, addr)
|
|
|
|
#define generic_test_and_set_le_bit(nr, addr) test_and_set_bit(nr, addr)
|
|
#define generic_test_and_clear_le_bit(nr, addr) test_and_clear_bit(nr, addr)
|
|
|
|
#define generic___test_and_set_le_bit(nr, addr) __test_and_set_bit(nr, addr)
|
|
#define generic___test_and_clear_le_bit(nr, addr) __test_and_clear_bit(nr, addr)
|
|
|
|
#define generic_find_next_zero_le_bit(addr, size, offset) find_next_zero_bit(addr, size, offset)
|
|
|
|
#elif defined(__BIG_ENDIAN)
|
|
|
|
#define generic_test_le_bit(nr, addr) \
|
|
test_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
|
|
#define generic___set_le_bit(nr, addr) \
|
|
__set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
|
|
#define generic___clear_le_bit(nr, addr) \
|
|
__clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
|
|
|
|
#define generic_test_and_set_le_bit(nr, addr) \
|
|
test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
|
|
#define generic_test_and_clear_le_bit(nr, addr) \
|
|
test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
|
|
|
|
#define generic___test_and_set_le_bit(nr, addr) \
|
|
__test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
|
|
#define generic___test_and_clear_le_bit(nr, addr) \
|
|
__test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
|
|
|
|
extern unsigned long generic_find_next_zero_le_bit(const unsigned long *addr,
|
|
unsigned long size, unsigned long offset);
|
|
|
|
#else
|
|
#error "Please fix <asm/byteorder.h>"
|
|
#endif
|
|
|
|
#define generic_find_first_zero_le_bit(addr, size) \
|
|
generic_find_next_zero_le_bit((addr), (size), 0)
|
|
|
|
#endif /* _ASM_GENERIC_BITOPS_LE_H_ */
|