diff options
| -rw-r--r-- | arch/powerpc/Kconfig | 4 | ||||
| -rw-r--r-- | arch/powerpc/lib/Makefile | 1 | ||||
| -rw-r--r-- | arch/powerpc/lib/bitops.c | 150 | ||||
| -rw-r--r-- | arch/ppc/Kconfig | 4 | ||||
| -rw-r--r-- | include/asm-powerpc/bitops.h | 6 |
5 files changed, 11 insertions, 154 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 6729c98b66f..75ba0ec49e5 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -45,6 +45,10 @@ config GENERIC_CALIBRATE_DELAY bool default y +config GENERIC_FIND_NEXT_BIT + bool + default y + config PPC bool default y diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index 34f5c2e074c..ae354d65b82 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -7,7 +7,6 @@ obj-y := string.o strcase.o obj-$(CONFIG_PPC32) += div64.o copy_32.o checksum_32.o endif -obj-y += bitops.o obj-$(CONFIG_PPC64) += checksum_64.o copypage_64.o copyuser_64.o \ memcpy_64.o usercopy_64.o mem_64.o string.o \ strcase.o diff --git a/arch/powerpc/lib/bitops.c b/arch/powerpc/lib/bitops.c deleted file mode 100644 index f68ad71a018..00000000000 --- a/arch/powerpc/lib/bitops.c +++ /dev/null @@ -1,150 +0,0 @@ -#include <linux/types.h> -#include <linux/module.h> -#include <asm/byteorder.h> -#include <asm/bitops.h> - -/** - * find_next_bit - find the next set bit in a memory region - * @addr: The address to base the search on - * @offset: The bitnumber to start searching at - * @size: The maximum size to search - */ -unsigned long find_next_bit(const unsigned long *addr, unsigned long size, - unsigned long offset) -{ - const unsigned long *p = addr + BITOP_WORD(offset); - unsigned long result = offset & ~(BITS_PER_LONG-1); - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset %= BITS_PER_LONG; - 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); -} -EXPORT_SYMBOL(find_next_bit); - -/* - * This implementation of find_{first,next}_zero_bit was stolen from - * Linus' asm-alpha/bitops.h. - */ -unsigned long find_next_zero_bit(const unsigned long *addr, unsigned long size, - unsigned long offset) -{ - const unsigned long *p = addr + BITOP_WORD(offset); - unsigned long result = offset & ~(BITS_PER_LONG-1); - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset %= BITS_PER_LONG; - 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; - if (tmp == ~0UL) /* Are any bits zero? */ - return result + size; /* Nope. */ -found_middle: - return result + ffz(tmp); -} -EXPORT_SYMBOL(find_next_zero_bit); - -static inline unsigned int ext2_ilog2(unsigned int x) -{ - int lz; - - asm("cntlzw %0,%1": "=r"(lz):"r"(x)); - return 31 - lz; -} - -static inline unsigned int ext2_ffz(unsigned int x) -{ - u32 rc; - if ((x = ~x) == 0) - return 32; - rc = ext2_ilog2(x & -x); - return rc; -} - -unsigned long find_next_zero_le_bit(const unsigned long *addr, - unsigned long size, unsigned long offset) -{ - const unsigned int *p = ((const unsigned int *)addr) + (offset >> 5); - unsigned int result = offset & ~31; - unsigned int tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31; - if (offset) { - tmp = cpu_to_le32p(p++); - tmp |= ~0U >> (32 - offset); /* bug or feature ? */ - if (size < 32) - goto found_first; - if (tmp != ~0) - goto found_middle; - size -= 32; - result += 32; - } - while (size >= 32) { - if ((tmp = cpu_to_le32p(p++)) != ~0) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = cpu_to_le32p(p); -found_first: - tmp |= ~0 << size; - if (tmp == ~0) /* Are any bits zero? */ - return result + size; /* Nope. */ -found_middle: - return result + ext2_ffz(tmp); -} -EXPORT_SYMBOL(find_next_zero_le_bit); diff --git a/arch/ppc/Kconfig b/arch/ppc/Kconfig index e9a8f5d1dfc..b55de4f42ae 100644 --- a/arch/ppc/Kconfig +++ b/arch/ppc/Kconfig @@ -40,6 +40,10 @@ config GENERIC_NVRAM bool default y +config GENERIC_FIND_NEXT_BIT + bool + default y + config SCHED_NO_NO_OMIT_FRAME_POINTER bool default y diff --git a/include/asm-powerpc/bitops.h b/include/asm-powerpc/bitops.h index d1c2a440566..76e2f08c3c8 100644 --- a/include/asm-powerpc/bitops.h +++ b/include/asm-powerpc/bitops.h @@ -288,8 +288,8 @@ static __inline__ int test_le_bit(unsigned long nr, #define __test_and_clear_le_bit(nr, addr) \ __test_and_clear_bit((nr) ^ BITOP_LE_SWIZZLE, (addr)) -#define find_first_zero_le_bit(addr, size) find_next_zero_le_bit((addr), (size), 0) -unsigned long find_next_zero_le_bit(const unsigned long *addr, +#define find_first_zero_le_bit(addr, size) generic_find_next_zero_le_bit((addr), (size), 0) +unsigned long generic_find_next_zero_le_bit(const unsigned long *addr, unsigned long size, unsigned long offset); /* Bitmap functions for the ext2 filesystem */ @@ -309,7 +309,7 @@ unsigned long find_next_zero_le_bit(const unsigned long *addr, #define ext2_find_first_zero_bit(addr, size) \ find_first_zero_le_bit((unsigned long*)addr, size) #define ext2_find_next_zero_bit(addr, size, off) \ - find_next_zero_le_bit((unsigned long*)addr, size, off) + generic_find_next_zero_le_bit((unsigned long*)addr, size, off) /* Bitmap functions for the minix filesystem. */ |