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Defines | |
| #define | ADDR (*(volatile long *) addr) |
Functions | |
| __inline__ int | TLSF_ffs (int x) |
| __inline__ int | TLSF_fls (int x) |
| __inline__ void | __clear_bit (int nr, volatile void *addr) |
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Definition at line 11 of file arch/bits.h. Referenced by __clear_bit(). |
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__clear_bit - Clears a bit in memory : Bit to clear : Address to start counting from clear_bit() is non-atomic and may be reordered. However, it does not contain a memory barrier, so if it is used for locking purposes, you should call smp_mb__before_clear_bit() and/or smp_mb__after_clear_bit() in order to ensure changes are visible on other processors. Definition at line 82 of file arch/bits.h. References ADDR.
00083 {
00084 __asm__ __volatile__(
00085 "btrl %1,%0"
00086 :"=m" (ADDR)
00087 :"Ir" (nr));
00088 }
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ffs - find first bit set : the word to search This is defined the same way as the libc and compiler builtin ffs routines, therefore differs in spirit from the above ffz (man ffs). Definition at line 23 of file arch/bits.h.
00024 {
00025 int r;
00026
00027 __asm__("bsfl %1,%0\n\t"
00028 "jnz 1f\n\t"
00029 "movl $-1,%0\n"
00030 "1:" : "=r" (r) : "g" (x));
00031 return r;
00032 }
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fls - find last bit set : the word to search This is defined the same way as the libc and compiler builtin ffs routines, therefore differs in spirit from the above ffz (man ffs). Definition at line 43 of file arch/bits.h.
00044 {
00045 int r;
00046
00047 __asm__("bsrl %1,%0\n\t"
00048 "jnz 1f\n\t"
00049 "movl $-1,%0\n"
00050 "1:" : "=r" (r) : "g" (x));
00051 return r;
00052 }
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1.3.4