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value swap macro change with xor #32

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value swap macro change with xor #32

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6 changes: 3 additions & 3 deletions include/linux/kernel.h
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Original file line number Diff line number Diff line change
Expand Up @@ -767,11 +767,11 @@ static inline void ftrace_dump(enum ftrace_dump_mode oops_dump_mode) { }


/*
* swap - swap value of @a and @b
* swap - swap value of @a and @b using xor
*/
#define swap(a, b) \
do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)

(((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))
/**
* container_of - cast a member of a structure out to the containing structure
* @ptr: the pointer to the member.
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