X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Fasm-generic%2Fbitops.h;h=1f9d99193df8ef368c70d8abb18ddcf3a885f91a;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=ce31b739fd80ff211e5583cf4b2c6cc762f6a037;hpb=cee37fe97739d85991964371c1f3a745c00dd236;p=linux-2.6.git diff --git a/include/asm-generic/bitops.h b/include/asm-generic/bitops.h index ce31b739f..1f9d99193 100644 --- a/include/asm-generic/bitops.h +++ b/include/asm-generic/bitops.h @@ -5,76 +5,27 @@ * For the benefit of those who are trying to port Linux to another * architecture, here are some C-language equivalents. You should * recode these in the native assembly language, if at all possible. - * To guarantee atomicity, these routines call cli() and sti() to - * disable interrupts while they operate. (You have to provide inline - * routines to cli() and sti().) - * - * Also note, these routines assume that you have 32 bit longs. - * You will have to change this if you are trying to port Linux to the - * Alpha architecture or to a Cray. :-) * * C language equivalents written by Theodore Ts'o, 9/26/92 */ -extern __inline__ int set_bit(int nr,long * addr) -{ - int mask, retval; - - addr += nr >> 5; - mask = 1 << (nr & 0x1f); - cli(); - retval = (mask & *addr) != 0; - *addr |= mask; - sti(); - return retval; -} - -extern __inline__ int clear_bit(int nr, long * addr) -{ - int mask, retval; - - addr += nr >> 5; - mask = 1 << (nr & 0x1f); - cli(); - retval = (mask & *addr) != 0; - *addr &= ~mask; - sti(); - return retval; -} - -extern __inline__ int test_bit(int nr, const unsigned long * addr) -{ - int mask; - - addr += nr >> 5; - mask = 1 << (nr & 0x1f); - return ((mask & *addr) != 0); -} - -/* - * fls: find last bit set. - */ - -#define fls(x) generic_fls(x) +#include +#include +#include +#include +#include +#include +#include #ifdef __KERNEL__ -/* - * ffs: find first bit set. This is defined the same way as - * the libc and compiler builtin ffs routines, therefore - * differs in spirit from the above ffz (man ffs). - */ - -#define ffs(x) generic_ffs(x) - -/* - * hweightN: returns the hamming weight (i.e. the number - * of bits set) of a N-bit word - */ +#include +#include +#include -#define hweight32(x) generic_hweight32(x) -#define hweight16(x) generic_hweight16(x) -#define hweight8(x) generic_hweight8(x) +#include +#include +#include #endif /* __KERNEL__ */