diff options
Diffstat (limited to 'include/asm-m68k')
-rw-r--r-- | include/asm-m68k/bitops.h | 86 |
1 files changed, 5 insertions, 81 deletions
diff --git a/include/asm-m68k/bitops.h b/include/asm-m68k/bitops.h index b7955b39d963..e845daac48ad 100644 --- a/include/asm-m68k/bitops.h +++ b/include/asm-m68k/bitops.h | |||
@@ -310,36 +310,10 @@ static inline int fls(int x) | |||
310 | 310 | ||
311 | return 32 - cnt; | 311 | return 32 - cnt; |
312 | } | 312 | } |
313 | #define fls64(x) generic_fls64(x) | ||
314 | |||
315 | /* | ||
316 | * Every architecture must define this function. It's the fastest | ||
317 | * way of searching a 140-bit bitmap where the first 100 bits are | ||
318 | * unlikely to be set. It's guaranteed that at least one of the 140 | ||
319 | * bits is cleared. | ||
320 | */ | ||
321 | static inline int sched_find_first_bit(const unsigned long *b) | ||
322 | { | ||
323 | if (unlikely(b[0])) | ||
324 | return __ffs(b[0]); | ||
325 | if (unlikely(b[1])) | ||
326 | return __ffs(b[1]) + 32; | ||
327 | if (unlikely(b[2])) | ||
328 | return __ffs(b[2]) + 64; | ||
329 | if (b[3]) | ||
330 | return __ffs(b[3]) + 96; | ||
331 | return __ffs(b[4]) + 128; | ||
332 | } | ||
333 | 313 | ||
334 | 314 | #include <asm-generic/bitops/fls64.h> | |
335 | /* | 315 | #include <asm-generic/bitops/sched.h> |
336 | * hweightN: returns the hamming weight (i.e. the number | 316 | #include <asm-generic/bitops/hweight.h> |
337 | * of bits set) of a N-bit word | ||
338 | */ | ||
339 | |||
340 | #define hweight32(x) generic_hweight32(x) | ||
341 | #define hweight16(x) generic_hweight16(x) | ||
342 | #define hweight8(x) generic_hweight8(x) | ||
343 | 317 | ||
344 | /* Bitmap functions for the minix filesystem */ | 318 | /* Bitmap functions for the minix filesystem */ |
345 | 319 | ||
@@ -377,61 +351,11 @@ static inline int minix_test_bit(int nr, const void *vaddr) | |||
377 | 351 | ||
378 | /* Bitmap functions for the ext2 filesystem. */ | 352 | /* Bitmap functions for the ext2 filesystem. */ |
379 | 353 | ||
380 | #define ext2_set_bit(nr, addr) __test_and_set_bit((nr) ^ 24, (unsigned long *)(addr)) | 354 | #include <asm-generic/bitops/ext2-non-atomic.h> |
355 | |||
381 | #define ext2_set_bit_atomic(lock, nr, addr) test_and_set_bit((nr) ^ 24, (unsigned long *)(addr)) | 356 | #define ext2_set_bit_atomic(lock, nr, addr) test_and_set_bit((nr) ^ 24, (unsigned long *)(addr)) |
382 | #define ext2_clear_bit(nr, addr) __test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr)) | ||
383 | #define ext2_clear_bit_atomic(lock, nr, addr) test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr)) | 357 | #define ext2_clear_bit_atomic(lock, nr, addr) test_and_clear_bit((nr) ^ 24, (unsigned long *)(addr)) |
384 | 358 | ||
385 | static inline int ext2_test_bit(int nr, const void *vaddr) | ||
386 | { | ||
387 | const unsigned char *p = vaddr; | ||
388 | return (p[nr >> 3] & (1U << (nr & 7))) != 0; | ||
389 | } | ||
390 | |||
391 | static inline int ext2_find_first_zero_bit(const void *vaddr, unsigned size) | ||
392 | { | ||
393 | const unsigned long *p = vaddr, *addr = vaddr; | ||
394 | int res; | ||
395 | |||
396 | if (!size) | ||
397 | return 0; | ||
398 | |||
399 | size = (size >> 5) + ((size & 31) > 0); | ||
400 | while (*p++ == ~0UL) | ||
401 | { | ||
402 | if (--size == 0) | ||
403 | return (p - addr) << 5; | ||
404 | } | ||
405 | |||
406 | --p; | ||
407 | for (res = 0; res < 32; res++) | ||
408 | if (!ext2_test_bit (res, p)) | ||
409 | break; | ||
410 | return (p - addr) * 32 + res; | ||
411 | } | ||
412 | |||
413 | static inline int ext2_find_next_zero_bit(const void *vaddr, unsigned size, | ||
414 | unsigned offset) | ||
415 | { | ||
416 | const unsigned long *addr = vaddr; | ||
417 | const unsigned long *p = addr + (offset >> 5); | ||
418 | int bit = offset & 31UL, res; | ||
419 | |||
420 | if (offset >= size) | ||
421 | return size; | ||
422 | |||
423 | if (bit) { | ||
424 | /* Look for zero in first longword */ | ||
425 | for (res = bit; res < 32; res++) | ||
426 | if (!ext2_test_bit (res, p)) | ||
427 | return (p - addr) * 32 + res; | ||
428 | p++; | ||
429 | } | ||
430 | /* No zero yet, search remaining full bytes for a zero */ | ||
431 | res = ext2_find_first_zero_bit (p, size - 32 * (p - addr)); | ||
432 | return (p - addr) * 32 + res; | ||
433 | } | ||
434 | |||
435 | #endif /* __KERNEL__ */ | 359 | #endif /* __KERNEL__ */ |
436 | 360 | ||
437 | #endif /* _M68K_BITOPS_H */ | 361 | #endif /* _M68K_BITOPS_H */ |