1DEL_TIMER_SYNC(9)                Driver Basics               DEL_TIMER_SYNC(9)
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NAME

6       del_timer_sync - deactivate a timer and wait for the handler to finish.
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SYNOPSIS

9       int del_timer_sync(struct timer_list * timer);
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ARGUMENTS

12       timer
13           the timer to be deactivated
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DESCRIPTION

16       This function only differs from del_timer on SMP: besides deactivating
17       the timer it also makes sure the handler has finished executing on
18       other CPUs.
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SYNCHRONIZATION RULES

21       Callers must prevent restarting of the timer, otherwise this function
22       is meaningless. It must not be called from interrupt contexts. The
23       caller must not hold locks which would prevent completion of the
24       timer´s handler. The timer´s handler must not call add_timer_on. Upon
25       exit the timer is not queued and the handler is not running on any CPU.
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27       The function returns whether it has deactivated a pending timer or not.
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30Kernel Hackers Manual 2.6.         June 2019                 DEL_TIMER_SYNC(9)
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