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930ae745f5
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_
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#define _ASM_GENERIC_BITOPS_LE_H_
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#include <asm/types.h>
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#include <asm/byteorder.h>
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#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG)
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#define BITOP_LE_SWIZZLE ((BITS_PER_LONG-1) & ~0x7)
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#if defined(__LITTLE_ENDIAN)
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#define generic_test_le_bit(nr, addr) test_bit(nr, addr)
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#define generic___set_le_bit(nr, addr) __set_bit(nr, addr)
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#define generic___clear_le_bit(nr, addr) __clear_bit(nr, addr)
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#define generic_test_and_set_le_bit(nr, addr) test_and_set_bit(nr, addr)
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#define generic_test_and_clear_le_bit(nr, addr) test_and_clear_bit(nr, addr)
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#define generic___test_and_set_le_bit(nr, addr) __test_and_set_bit(nr, addr)
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#define generic___test_and_clear_le_bit(nr, addr) __test_and_clear_bit(nr, addr)
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#define generic_find_next_zero_le_bit(addr, size, offset) find_next_zero_bit(addr, size, offset)
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#elif defined(__BIG_ENDIAN)
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#define generic_test_le_bit(nr, addr) \
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test_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
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#define generic___set_le_bit(nr, addr) \
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__set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
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#define generic___clear_le_bit(nr, addr) \
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__clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
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#define generic_test_and_set_le_bit(nr, addr) \
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test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
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#define generic_test_and_clear_le_bit(nr, addr) \
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test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
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#define generic___test_and_set_le_bit(nr, addr) \
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__test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
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#define generic___test_and_clear_le_bit(nr, addr) \
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__test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))
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extern unsigned long generic_find_next_zero_le_bit(const unsigned long *addr,
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unsigned long size, unsigned long offset);
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#else
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#error "Please fix <asm/byteorder.h>"
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#endif
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#define generic_find_first_zero_le_bit(addr, size) \
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generic_find_next_zero_le_bit((addr), (size), 0)
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#endif /* _ASM_GENERIC_BITOPS_LE_H_ */
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