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| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-10-29 02:29:17 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2016-10-29 02:29:17 +0300 |
| commit | 8b2ada27dc1045e8191673bf769a1136ce8a0127 (patch) | |
| tree | df2fe577fb2f01c477e7e217cec9fd47c6ce812b /include/linux/bitmap.h | |
| parent | 2f1d407adab026b34a105ed27b1d4d7e910c4448 (diff) | |
| parent | 1adb469b9b76276d7e5ea36a20a24c47d6618a0b (diff) | |
| download | linux-8b2ada27dc1045e8191673bf769a1136ce8a0127.tar.xz | |
Merge branches 'pm-cpufreq-fixes' and 'pm-sleep-fixes'
* pm-cpufreq-fixes:
cpufreq: intel_pstate: Always set max P-state in performance mode
cpufreq: intel_pstate: Set P-state upfront in performance mode
* pm-sleep-fixes:
PM / suspend: Fix missing KERN_CONT for suspend message
Diffstat (limited to 'include/linux/bitmap.h')
| -rw-r--r-- | include/linux/bitmap.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 598bc999f4c2..3b77588a9360 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -339,6 +339,24 @@ static inline int bitmap_parse(const char *buf, unsigned int buflen, return __bitmap_parse(buf, buflen, 0, maskp, nmaskbits); } +/* + * bitmap_from_u64 - Check and swap words within u64. + * @mask: source bitmap + * @dst: destination bitmap + * + * In 32-bit Big Endian kernel, when using (u32 *)(&val)[*] + * to read u64 mask, we will get the wrong word. + * That is "(u32 *)(&val)[0]" gets the upper 32 bits, + * but we expect the lower 32-bits of u64. + */ +static inline void bitmap_from_u64(unsigned long *dst, u64 mask) +{ + dst[0] = mask & ULONG_MAX; + + if (sizeof(mask) > sizeof(unsigned long)) + dst[1] = mask >> 32; +} + #endif /* __ASSEMBLY__ */ #endif /* __LINUX_BITMAP_H */ |
