From af66abfe2ec8bd82211e9e4f036a64c902ff4cdb Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Thu, 23 Oct 2014 15:23:35 +0100 Subject: arm: perf: fold hotplug notifier into arm_pmu Handling multiple PMUs using a single hotplug notifier requires a list of PMUs to be maintained, with synchronisation in the probe, remove, and notify paths. This is error-prone and makes the code much harder to maintain. Instead of using a single notifier, we can dynamically allocate a notifier block per-PMU. The end result is the same, but the list of PMUs is implicit in the hotplug notifier list rather than within a perf-local data structure, which makes the code far easier to handle. Signed-off-by: Mark Rutland Reviewed-by: Stephen Boyd Signed-off-by: Will Deacon --- arch/arm/include/asm/pmu.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm/include/asm/pmu.h') diff --git a/arch/arm/include/asm/pmu.h b/arch/arm/include/asm/pmu.h index cc0149835507..b1596bd59129 100644 --- a/arch/arm/include/asm/pmu.h +++ b/arch/arm/include/asm/pmu.h @@ -116,6 +116,7 @@ struct arm_pmu { u64 max_period; struct platform_device *plat_device; struct pmu_hw_events __percpu *hw_events; + struct notifier_block hotplug_nb; }; #define to_arm_pmu(p) (container_of(p, struct arm_pmu, pmu)) -- cgit v1.2.3-59-g8ed1b