On Fri, Jun 24, 2016 at 02:32:01PM -0000, Thomas Gleixner wrote: > We want to move the timer migration from a push to a pull model. This requires > to store the pinned attribute of a timer in the timer itself. This must happen > at initialization time. > > Add the helper macros for this. > > Signed-off-by: Thomas Gleixner <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Frederic Weisbecker <[email protected]> > Cc: Chris Mason <[email protected]> > Cc: Eric Dumazet <[email protected]> > Cc: [email protected] > Cc: "Paul E. McKenney" <[email protected]> > Cc: Arjan van de Ven <[email protected]> > > > --- > include/linux/timer.h | 25 ++++++++++++++++++++++--- > kernel/time/timer.c | 10 +++++----- > 2 files changed, 27 insertions(+), 8 deletions(-) > > --- a/include/linux/timer.h > +++ b/include/linux/timer.h > @@ -62,7 +62,8 @@ struct timer_list { > #define TIMER_MIGRATING 0x00080000 > #define TIMER_BASEMASK (TIMER_CPUMASK | TIMER_MIGRATING) > #define TIMER_DEFERRABLE 0x00100000 > -#define TIMER_IRQSAFE 0x00200000 > +#define TIMER_PINNED 0x00200000 > +#define TIMER_IRQSAFE 0x00400000 > > #define __TIMER_INITIALIZER(_function, _expires, _data, _flags) { \ > .entry = { .next = TIMER_ENTRY_STATIC }, \ > @@ -78,9 +79,15 @@ struct timer_list { > #define TIMER_INITIALIZER(_function, _expires, _data) \ > __TIMER_INITIALIZER((_function), (_expires), (_data), 0) > > +#define TIMER_PINNED_INITIALIZER(_function, _expires, _data) \ > + __TIMER_INITIALIZER((_function), (_expires), (_data), TIMER_PINNED) > + > #define TIMER_DEFERRED_INITIALIZER(_function, _expires, _data) \ > __TIMER_INITIALIZER((_function), (_expires), (_data), TIMER_DEFERRABLE) > > +#define TIMER_PINNED_DEFERRED_INITIALIZER(_function, _expires, _data) > \ > + __TIMER_INITIALIZER((_function), (_expires), (_data), TIMER_DEFERRABLE > | TIMER_PINNED) > +
I guess it means that no timer took the freedom to be sometimes enqueued pinned and sometimes unpinned. Which is a good news :-)
