diff options
| author | Akinobu Mita <mita@miraclelinux.com> | 2006-03-26 04:39:50 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-26 11:57:15 -0500 |
| commit | f51a05c16d3d051f5e000c50bccc4be91fe5f9f3 (patch) | |
| tree | 5753aad24e45b7218f63f789c754de1117c56df4 | |
| parent | d4337aa5281a7357666f713339211fcd278f4e7a (diff) | |
[PATCH] bitops: update include/asm-generic/bitops.h
Currently include/asm-generic/bitops.h is not referenced from anywhere. But
it will be the benefit of those who are trying to port Linux to another
architecture.
So update it by same manner
Signed-off-by: Akinobu Mita <mita@miraclelinux.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/asm-generic/bitops.h | 76 |
1 files changed, 13 insertions, 63 deletions
diff --git a/include/asm-generic/bitops.h b/include/asm-generic/bitops.h index 0e6d9852008c..1f9d99193df8 100644 --- a/include/asm-generic/bitops.h +++ b/include/asm-generic/bitops.h | |||
| @@ -5,77 +5,27 @@ | |||
| 5 | * For the benefit of those who are trying to port Linux to another | 5 | * For the benefit of those who are trying to port Linux to another |
| 6 | * architecture, here are some C-language equivalents. You should | 6 | * architecture, here are some C-language equivalents. You should |
| 7 | * recode these in the native assembly language, if at all possible. | 7 | * recode these in the native assembly language, if at all possible. |
| 8 | * To guarantee atomicity, these routines call cli() and sti() to | ||
| 9 | * disable interrupts while they operate. (You have to provide inline | ||
| 10 | * routines to cli() and sti().) | ||
| 11 | * | ||
| 12 | * Also note, these routines assume that you have 32 bit longs. | ||
| 13 | * You will have to change this if you are trying to port Linux to the | ||
| 14 | * Alpha architecture or to a Cray. :-) | ||
| 15 | * | 8 | * |
| 16 | * C language equivalents written by Theodore Ts'o, 9/26/92 | 9 | * C language equivalents written by Theodore Ts'o, 9/26/92 |
| 17 | */ | 10 | */ |
| 18 | 11 | ||
| 19 | extern __inline__ int set_bit(int nr,long * addr) | 12 | #include <asm-generic/bitops/atomic.h> |
| 20 | { | 13 | #include <asm-generic/bitops/non-atomic.h> |
| 21 | int mask, retval; | 14 | #include <asm-generic/bitops/__ffs.h> |
| 22 | 15 | #include <asm-generic/bitops/ffz.h> | |
| 23 | addr += nr >> 5; | 16 | #include <asm-generic/bitops/fls.h> |
| 24 | mask = 1 << (nr & 0x1f); | 17 | #include <asm-generic/bitops/fls64.h> |
| 25 | cli(); | 18 | #include <asm-generic/bitops/find.h> |
| 26 | retval = (mask & *addr) != 0; | ||
| 27 | *addr |= mask; | ||
| 28 | sti(); | ||
| 29 | return retval; | ||
| 30 | } | ||
| 31 | |||
| 32 | extern __inline__ int clear_bit(int nr, long * addr) | ||
| 33 | { | ||
| 34 | int mask, retval; | ||
| 35 | |||
| 36 | addr += nr >> 5; | ||
| 37 | mask = 1 << (nr & 0x1f); | ||
| 38 | cli(); | ||
| 39 | retval = (mask & *addr) != 0; | ||
| 40 | *addr &= ~mask; | ||
| 41 | sti(); | ||
| 42 | return retval; | ||
| 43 | } | ||
| 44 | |||
| 45 | extern __inline__ int test_bit(int nr, const unsigned long * addr) | ||
| 46 | { | ||
| 47 | int mask; | ||
| 48 | |||
| 49 | addr += nr >> 5; | ||
| 50 | mask = 1 << (nr & 0x1f); | ||
| 51 | return ((mask & *addr) != 0); | ||
| 52 | } | ||
| 53 | |||
| 54 | /* | ||
| 55 | * fls: find last bit set. | ||
| 56 | */ | ||
| 57 | |||
| 58 | #define fls(x) generic_fls(x) | ||
| 59 | #define fls64(x) generic_fls64(x) | ||
| 60 | 19 | ||
| 61 | #ifdef __KERNEL__ | 20 | #ifdef __KERNEL__ |
| 62 | 21 | ||
| 63 | /* | 22 | #include <asm-generic/bitops/sched.h> |
| 64 | * ffs: find first bit set. This is defined the same way as | 23 | #include <asm-generic/bitops/ffs.h> |
| 65 | * the libc and compiler builtin ffs routines, therefore | 24 | #include <asm-generic/bitops/hweight.h> |
| 66 | * differs in spirit from the above ffz (man ffs). | ||
| 67 | */ | ||
| 68 | |||
| 69 | #define ffs(x) generic_ffs(x) | ||
| 70 | |||
| 71 | /* | ||
| 72 | * hweightN: returns the hamming weight (i.e. the number | ||
| 73 | * of bits set) of a N-bit word | ||
| 74 | */ | ||
| 75 | 25 | ||
| 76 | #define hweight32(x) generic_hweight32(x) | 26 | #include <asm-generic/bitops/ext2-non-atomic.h> |
| 77 | #define hweight16(x) generic_hweight16(x) | 27 | #include <asm-generic/bitops/ext2-atomic.h> |
| 78 | #define hweight8(x) generic_hweight8(x) | 28 | #include <asm-generic/bitops/minix.h> |
| 79 | 29 | ||
| 80 | #endif /* __KERNEL__ */ | 30 | #endif /* __KERNEL__ */ |
| 81 | 31 | ||
