kcmp_lock

Name:kcmp_lock

Proto:static int kcmp_lock(struct mutex *m1, struct mutex *m2)

Type:int

Parameter:

Type	Parameter	Name
struct mutex *	m1
struct mutex *	m2

89

If m2 > m1 Then swap - swap values of @a and @b*@a: first value*@b: second value(m1, m2)

92

err = mutex_lock_killable(m1)

93

If Not err && Value is more likely to compile time(m1 != m2) Then

94

err = mutex_lock_killable_nested(m2, For trivial one-depth nesting of a lock-class, the following* global define can be used. (Subsystems with multiple levels* of nesting should define their own lock-nesting subclasses.))

95

If err Then mutex_unlock - release the mutex*@lock: the mutex to be released* Unlock a mutex that has been locked by this task previously.* This function must not be used in interrupt context. Unlocking* of a not locked mutex is not allowed.

99

Return err

**Caller**
Name	Describe
SYSCALL_DEFINE5

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