__test_and_set_bit man page on Scientific

__test_and_set_bit man page on Scientific

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__TEST_AND_SET_BIT(9)	   Basic C Library Functions	 __TEST_AND_SET_BIT(9)

NAME
       __test_and_set_bit - Set a bit and return its old value

SYNOPSIS
       int __test_and_set_bit(int nr, volatile unsigned long * addr);

ARGUMENTS
       nr
	   Bit to set

       addr
	   Address to count from

DESCRIPTION
       This operation is non-atomic and can be reordered. If two examples of
       this operation race, one can appear to succeed but actually fail. You
       must protect multiple accesses with a lock.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013		 __TEST_AND_SET_BIT(9)

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