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Commit f57d7ff1 authored by Akinobu Mita's avatar Akinobu Mita Committed by Linus Torvalds
Browse files

powerpc: introduce little-endian bitops 



Introduce little-endian bit operations by renaming existing powerpc native
little-endian bit operations and changing them to take any pointer types.

Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a56560b3

arch/powerpc/include/asm/bitops.h

+38 −23
Original line number Diff line number Diff line
@@ -281,27 +281,42 @@ unsigned long __arch_hweight64(__u64 w); 


/* Little-endian versions */



static __inline__ int test_le_bit(unsigned long nr,

				  __const__ unsigned long *addr)

static __inline__ int test_bit_le(unsigned long nr,

				  __const__ void *addr)

{

	__const__ unsigned char	*tmp = (__const__ unsigned char *) addr;

	return (tmp[nr >> 3] >> (nr & 7)) & 1;

}



#define __set_le_bit(nr, addr) \

	__set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))

#define __clear_le_bit(nr, addr) \

	__clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))

static inline void __set_bit_le(int nr, void *addr)

{

	__set_bit(nr ^ BITOP_LE_SWIZZLE, addr);

}



static inline void __clear_bit_le(int nr, void *addr)

{

	__clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);

}



#define test_and_set_le_bit(nr, addr) \

	test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))

#define test_and_clear_le_bit(nr, addr) \

	test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))

static inline int test_and_set_bit_le(int nr, void *addr)

{

	return test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);

}



#define __test_and_set_le_bit(nr, addr) \

	__test_and_set_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))

#define __test_and_clear_le_bit(nr, addr) \

	__test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr))

static inline int test_and_clear_bit_le(int nr, void *addr)

{

	return test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);

}



static inline int __test_and_set_bit_le(int nr, void *addr)

{

	return __test_and_set_bit(nr ^ BITOP_LE_SWIZZLE, addr);

}



static inline int __test_and_clear_bit_le(int nr, void *addr)

{

	return __test_and_clear_bit(nr ^ BITOP_LE_SWIZZLE, addr);

}



#define find_first_zero_bit_le(addr, size) \

	find_next_zero_bit_le((addr), (size), 0)
@@ -313,16 +328,16 @@ unsigned long find_next_bit_le(const void *addr, 
/* Bitmap functions for the ext2 filesystem */



#define ext2_set_bit(nr,addr) \

	__test_and_set_le_bit((nr), (unsigned long*)addr)

	__test_and_set_bit_le((nr), (unsigned long*)addr)

#define ext2_clear_bit(nr, addr) \

	__test_and_clear_le_bit((nr), (unsigned long*)addr)

	__test_and_clear_bit_le((nr), (unsigned long*)addr)



#define ext2_set_bit_atomic(lock, nr, addr) \

	test_and_set_le_bit((nr), (unsigned long*)addr)

	test_and_set_bit_le((nr), (unsigned long*)addr)

#define ext2_clear_bit_atomic(lock, nr, addr) \

	test_and_clear_le_bit((nr), (unsigned long*)addr)

	test_and_clear_bit_le((nr), (unsigned long*)addr)



#define ext2_test_bit(nr, addr)      test_le_bit((nr),(unsigned long*)addr)

#define ext2_test_bit(nr, addr)      test_bit_le((nr),(unsigned long*)addr)



#define ext2_find_first_zero_bit(addr, size) \

	find_first_zero_bit_le((unsigned long*)addr, size)
@@ -334,13 +349,13 @@ unsigned long find_next_bit_le(const void *addr, 
/* Bitmap functions for the minix filesystem.  */



#define minix_test_and_set_bit(nr,addr) \

	__test_and_set_le_bit(nr, (unsigned long *)addr)

	__test_and_set_bit_le(nr, (unsigned long *)addr)

#define minix_set_bit(nr,addr) \

	__set_le_bit(nr, (unsigned long *)addr)

	__set_bit_le(nr, (unsigned long *)addr)

#define minix_test_and_clear_bit(nr,addr) \

	__test_and_clear_le_bit(nr, (unsigned long *)addr)

	__test_and_clear_bit_le(nr, (unsigned long *)addr)

#define minix_test_bit(nr,addr) \

	test_le_bit(nr, (unsigned long *)addr)

	test_bit_le(nr, (unsigned long *)addr)



#define minix_find_first_zero_bit(addr,size) \

	find_first_zero_bit_le((unsigned long *)addr, size)