diff options
| author | Andi Kleen <ak@linux.intel.com> | 2017-10-13 14:56:41 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-17 17:14:56 +0200 |
| commit | cbe96375025e14fc76f9ed42ee5225120d7210f8 (patch) | |
| tree | 3cf4b026d73aa903984aabb03aecca3b1dc0b33e | |
| parent | 127a1bea40f7f2a36bc7207ea4d51bb6b4e936fa (diff) | |
bitops: Add clear/set_bit32() to linux/bitops.h
Add two simple wrappers around set_bit/clear_bit() that accept
the common case of an u32 array. This avoids writing
casts in all callers.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171013215645.23166-2-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | include/linux/bitops.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 8fbe259b197c9..36794f058ba67 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -227,6 +227,32 @@ static inline unsigned long __ffs64(u64 word) return __ffs((unsigned long)word); } +/* + * clear_bit32 - Clear a bit in memory for u32 array + * @nr: Bit to clear + * @addr: u32 * address of bitmap + * + * Same as clear_bit, but avoids needing casts for u32 arrays. + */ + +static __always_inline void clear_bit32(long nr, volatile u32 *addr) +{ + clear_bit(nr, (volatile unsigned long *)addr); +} + +/* + * set_bit32 - Set a bit in memory for u32 array + * @nr: Bit to clear + * @addr: u32 * address of bitmap + * + * Same as set_bit, but avoids needing casts for u32 arrays. + */ + +static __always_inline void set_bit32(long nr, volatile u32 *addr) +{ + set_bit(nr, (volatile unsigned long *)addr); +} + #ifdef __KERNEL__ #ifndef set_mask_bits |