Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030384AbWBNFTG (ORCPT ); Tue, 14 Feb 2006 00:19:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030428AbWBNFNZ (ORCPT ); Tue, 14 Feb 2006 00:13:25 -0500 Received: from ns.miraclelinux.com ([219.118.163.66]:35023 "EHLO mail01.miraclelinux.com") by vger.kernel.org with ESMTP id S1030388AbWBNFFH (ORCPT ); Tue, 14 Feb 2006 00:05:07 -0500 Message-Id: <20060214050448.975047000@localhost.localdomain> References: <20060214050351.252615000@localhost.localdomain> Date: Tue, 14 Feb 2006 14:04:29 +0900 From: Akinobu Mita To: linux-kernel@vger.kernel.org Cc: akpm@osdl.org, Miles Bader , Akinobu Mita Subject: [patch 38/47] v850: use generic bitops Content-Disposition: inline; filename=v850.patch Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6803 Lines: 286 - remove ffz() - remove find_{next,first}{,_zero}_bit() - remove generic_ffs() - remove generic_fls() - remove generic_fls64() - remove __ffs() - remove sched_find_first_bit() - remove generic_hweight{32,16,8}() - remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit() - remove minix_{test,set,test_and_clear,test,find_first_zero}_bit() Signed-off-by: Akinobu Mita arch/v850/Kconfig | 6 + include/asm-v850/bitops.h | 222 ++-------------------------------------------- 2 files changed, 18 insertions(+), 210 deletions(-) Index: 2.6-rc/include/asm-v850/bitops.h =================================================================== --- 2.6-rc.orig/include/asm-v850/bitops.h +++ 2.6-rc/include/asm-v850/bitops.h @@ -22,25 +22,11 @@ #ifdef __KERNEL__ -/* - * The __ functions are not atomic - */ +#include /* - * ffz = Find First Zero in word. Undefined if no zero exists, - * so code should check against ~0UL first.. + * The __ functions are not atomic */ -static inline unsigned long ffz (unsigned long word) -{ - unsigned long result = 0; - - while (word & 1) { - result++; - word >>= 1; - } - return result; -} - /* In the following constant-bit-op macros, a "g" constraint is used when we really need an integer ("i" constraint). This is to avoid @@ -153,203 +139,19 @@ static inline int __test_bit (int nr, co #define smp_mb__before_clear_bit() barrier () #define smp_mb__after_clear_bit() barrier () +#include +#include +#include +#include +#include +#include +#include -#define find_first_zero_bit(addr, size) \ - find_next_zero_bit ((addr), (size), 0) - -static inline int find_next_zero_bit(const void *addr, int size, int offset) -{ - unsigned long *p = ((unsigned long *) addr) + (offset >> 5); - unsigned long result = offset & ~31UL; - unsigned long tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31UL; - if (offset) { - tmp = * (p++); - tmp |= ~0UL >> (32-offset); - if (size < 32) - goto found_first; - if (~tmp) - goto found_middle; - size -= 32; - result += 32; - } - while (size & ~31UL) { - if (~ (tmp = * (p++))) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = *p; - - found_first: - tmp |= ~0UL << size; - found_middle: - return result + ffz (tmp); -} - - -/* This is the same as generic_ffs, but we can't use that because it's - inline and the #include order mucks things up. */ -static inline int generic_ffs_for_find_next_bit(int x) -{ - int r = 1; - - if (!x) - return 0; - if (!(x & 0xffff)) { - x >>= 16; - r += 16; - } - if (!(x & 0xff)) { - x >>= 8; - r += 8; - } - if (!(x & 0xf)) { - x >>= 4; - r += 4; - } - if (!(x & 3)) { - x >>= 2; - r += 2; - } - if (!(x & 1)) { - x >>= 1; - r += 1; - } - return r; -} - -/* - * Find next one bit in a bitmap reasonably efficiently. - */ -static __inline__ unsigned long find_next_bit(const unsigned long *addr, - unsigned long size, unsigned long offset) -{ - unsigned int *p = ((unsigned int *) addr) + (offset >> 5); - unsigned int result = offset & ~31UL; - unsigned int tmp; - - if (offset >= size) - return size; - size -= result; - offset &= 31UL; - if (offset) { - tmp = *p++; - tmp &= ~0UL << offset; - if (size < 32) - goto found_first; - if (tmp) - goto found_middle; - size -= 32; - result += 32; - } - while (size >= 32) { - if ((tmp = *p++) != 0) - goto found_middle; - result += 32; - size -= 32; - } - if (!size) - return result; - tmp = *p; - -found_first: - tmp &= ~0UL >> (32 - size); - if (tmp == 0UL) /* Are any bits set? */ - return result + size; /* Nope. */ -found_middle: - return result + generic_ffs_for_find_next_bit(tmp); -} - -/* - * find_first_bit - find the first set bit in a memory region - */ -#define find_first_bit(addr, size) \ - find_next_bit((addr), (size), 0) - - -#define ffs(x) generic_ffs (x) -#define fls(x) generic_fls (x) -#define fls64(x) generic_fls64(x) -#define __ffs(x) ffs(x) - - -/* - * This is just `generic_ffs' from , except that it assumes - * that at least one bit is set, and returns the real index of the bit - * (rather than the bit index + 1, like ffs does). - */ -static inline int sched_ffs(int x) -{ - int r = 0; - - if (!(x & 0xffff)) { - x >>= 16; - r += 16; - } - if (!(x & 0xff)) { - x >>= 8; - r += 8; - } - if (!(x & 0xf)) { - x >>= 4; - r += 4; - } - if (!(x & 3)) { - x >>= 2; - r += 2; - } - if (!(x & 1)) { - x >>= 1; - r += 1; - } - return r; -} - -/* - * Every architecture must define this function. It's the fastest - * way of searching a 140-bit bitmap where the first 100 bits are - * unlikely to be set. It's guaranteed that at least one of the 140 - * bits is set. - */ -static inline int sched_find_first_bit(unsigned long *b) -{ - unsigned offs = 0; - while (! *b) { - b++; - offs += 32; - } - return sched_ffs (*b) + offs; -} - -/* - * hweightN: returns the hamming weight (i.e. the number - * of bits set) of a N-bit word - */ -#define hweight32(x) generic_hweight32 (x) -#define hweight16(x) generic_hweight16 (x) -#define hweight8(x) generic_hweight8 (x) - -#define ext2_set_bit __test_and_set_bit +#include #define ext2_set_bit_atomic(l,n,a) test_and_set_bit(n,a) -#define ext2_clear_bit __test_and_clear_bit #define ext2_clear_bit_atomic(l,n,a) test_and_clear_bit(n,a) -#define ext2_test_bit test_bit -#define ext2_find_first_zero_bit find_first_zero_bit -#define ext2_find_next_zero_bit find_next_zero_bit - -/* Bitmap functions for the minix filesystem. */ -#define minix_test_and_set_bit __test_and_set_bit -#define minix_set_bit __set_bit -#define minix_test_and_clear_bit __test_and_clear_bit -#define minix_test_bit test_bit -#define minix_find_first_zero_bit find_first_zero_bit + +#include #endif /* __KERNEL__ */ Index: 2.6-rc/arch/v850/Kconfig =================================================================== --- 2.6-rc.orig/arch/v850/Kconfig +++ 2.6-rc/arch/v850/Kconfig @@ -16,6 +16,12 @@ config RWSEM_GENERIC_SPINLOCK config RWSEM_XCHGADD_ALGORITHM bool default n +config GENERIC_FIND_NEXT_BIT + bool + default y +config GENERIC_HWEIGHT + bool + default y config GENERIC_CALIBRATE_DELAY bool default y -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/