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kernel/linux-rt-4.4.41/include/asm-generic/bitops/ext2-atomic.h 561 Bytes
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  #ifndef _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
  #define _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_
  
  /*
   * Spinlock based version of ext2 atomic bitops
   */
  
  #define ext2_set_bit_atomic(lock, nr, addr)		\
  	({						\
  		int ret;				\
  		spin_lock(lock);			\
  		ret = __test_and_set_bit_le(nr, addr);	\
  		spin_unlock(lock);			\
  		ret;					\
  	})
  
  #define ext2_clear_bit_atomic(lock, nr, addr)		\
  	({						\
  		int ret;				\
  		spin_lock(lock);			\
  		ret = __test_and_clear_bit_le(nr, addr);	\
  		spin_unlock(lock);			\
  		ret;					\
  	})
  
  #endif /* _ASM_GENERIC_BITOPS_EXT2_ATOMIC_H_ */