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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>
This commit is contained in:
Andi Kleen 2017-10-13 14:56:41 -07:00 committed by Ingo Molnar
parent 127a1bea40
commit cbe9637502
1 changed files with 26 additions and 0 deletions
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26
include/linux/bitops.h
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@ -227,6 +227,32 @@ static inline unsigned long __ffs64(u64 word)
return __ffs((unsigned long)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__ #ifdef __KERNEL__
#ifndef set_mask_bits #ifndef set_mask_bits