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#ifndef _ASM_GENERIC_BITOPS_H
#define _ASM_GENERIC_BITOPS_H
/*
* 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 integers.
* 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
*/
#ifdef __USE_GENERIC_set_bit
extern __inline__ int set_bit(int nr, void * addr)
{
int mask, retval;
int *a = addr;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
cli();
retval = (mask & *a) != 0;
*a |= mask;
sti();
return retval;
}
#endif
#ifdef __USE_GENERIC_clear_bit
extern __inline__ int clear_bit(int nr, void * addr)
{
int mask, retval;
int *a = addr;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
cli();
retval = (mask & *a) != 0;
*a &= ~mask;
sti();
return retval;
}
#endif
#ifdef __USE_GENERIC_test_bit
extern __inline__ int test_bit(int nr, void * addr)
{
int mask;
int *a = addr;
a += nr >> 5;
mask = 1 << (nr & 0x1f);
return ((mask & *a) != 0);
}
#endif
#ifdef __USE_GENERIC_find_first_zero_bit
#error "Generic find_first_zero_bit() not written yet."
#endif
#ifdef __USE_GENERIC_find_next_zero_bit
#error "Generic find_next_zero_bit() not written yet."
#endif
#endif /* _ASM_GENERIC_BITOPS_H */
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