diff options
| author | Ingo Molnar <mingo@elte.hu> | 2011-02-14 11:55:18 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-02-14 11:55:18 +0100 |
| commit | d2137d5af4259f50c19addb8246a186c9ffac325 (patch) | |
| tree | 2f7e309f9cf8ef2f2698532c226edda38021fe69 /include/linux/bitops.h | |
| parent | f005fe12b90c5b9fe180a09209a893e09affa8aa (diff) | |
| parent | 795abaf1e4e188c4171e3cd3dbb11a9fcacaf505 (diff) | |
Merge branch 'linus' into x86/bootmem
Conflicts:
arch/x86/mm/numa_64.c
Merge reason: fix the conflict, update to latest -rc and pick up this
dependent fix from Yinghai:
e6d2e2b2b1e1: memblock: don't adjust size in memblock_find_base()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/bitops.h')
| -rw-r--r-- | include/linux/bitops.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 827cc95711ef..2184c6b97aeb 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -109,6 +109,17 @@ static inline __u8 ror8(__u8 word, unsigned int shift) return (word >> shift) | (word << (8 - shift)); } +/** + * sign_extend32 - sign extend a 32-bit value using specified bit as sign-bit + * @value: value to sign extend + * @index: 0 based bit index (0<=index<32) to sign bit + */ +static inline __s32 sign_extend32(__u32 value, int index) +{ + __u8 shift = 31 - index; + return (__s32)(value << shift) >> shift; +} + static inline unsigned fls_long(unsigned long l) { if (sizeof(l) == 4) |