1ATOMIC64_XCHG(9)                 Driver Basics                ATOMIC64_XCHG(9)
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NAME

6       atomic64_xchg - xchg atomic64 variable
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SYNOPSIS

9       u64 atomic64_xchg(atomic64_t * ptr, u64 new_val);
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ARGUMENTS

12       ptr
13           pointer to type atomic64_t
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15       new_val
16           value to assign
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DESCRIPTION

19       Atomically xchgs the value of ptr to new_val and returns the old value.
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22Kernel Hackers Manual 2.6.         June 2019                  ATOMIC64_XCHG(9)
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