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Daniel Thompson
13dbeb384d
Currently cd.read_data.suspended is read by the hotpath function sched_clock(). This variable need not be accessed on the hotpath. In fact, once it is removed, we can remove the conditional branches from sched_clock() and install a dummy read_sched_clock function to suspend the clock. The new master copy of the function pointer (actual_read_sched_clock) is introduced and is used for all reads of the clock hardware except those within sched_clock itself. Suggested-by: Thomas Gleixner <[email protected]> Signed-off-by: Daniel Thompson <[email protected]> Signed-off-by: John Stultz <[email protected]> Reviewed-by: Stephen Boyd <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Cc: Catalin Marinas <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Russell King <[email protected]> Cc: Will Deacon <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>