In timer.c , in the run_timer_list function, there are two variables declared : run_timer_list_running and queued. I am confused as to how these variables are used ?
APMU run_timer_list_running is a global list_head which is used by internal_add_timer() to see if run_timer_list() is invoking the callback routines from the timer list. While this is being done no new timers can be added.
though in later kernels (2.5.56) things seem to be different.
Abhishek
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