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arm_pmu: simplify arm_pmu::handle_irq

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The arm_pmu::handle_irq() callback has the same prototype as a generic
IRQ handler, taking the IRQ number and a void pointer argument which it
must convert to an arm_pmu pointer.

This means that all arm_pmu::handle_irq() take an IRQ number they never
use, and all must explicitly cast the void pointer to an arm_pmu
pointer.

Instead, let's change arm_pmu::handle_irq to take an arm_pmu pointer,
allowing these casts to be removed. The redundant IRQ number parameter
is also removed.

Suggested-by: Hoeun Ryu <hoeun.ryu@lge.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Mark Rutland 2018-05-10 11:35:15 +01:00 committed by Will Deacon
parent 5c591304e7
commit 0788f1e973
6 changed files with 7 additions and 13 deletions
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4
arch/arm/kernel/perf_event_v6.c
View File

@ -303,12 +303,10 @@ static void armv6pmu_enable_event(struct perf_event *event)
}
static irqreturn_t
armv6pmu_handle_irq(int irq_num,
void *dev)
armv6pmu_handle_irq(struct arm_pmu *cpu_pmu)
{
unsigned long pmcr = armv6_pmcr_read();
struct perf_sample_data data;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
struct pt_regs *regs;
int idx;

3
arch/arm/kernel/perf_event_v7.c
View File

@ -946,11 +946,10 @@ static void armv7pmu_disable_event(struct perf_event *event)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev)
static irqreturn_t armv7pmu_handle_irq(struct arm_pmu *cpu_pmu)
{
u32 pmnc;
struct perf_sample_data data;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
struct pt_regs *regs;
int idx;

6
arch/arm/kernel/perf_event_xscale.c
View File

@ -142,11 +142,10 @@ xscale1_pmnc_counter_has_overflowed(unsigned long pmnc,
}
static irqreturn_t
xscale1pmu_handle_irq(int irq_num, void *dev)
xscale1pmu_handle_irq(struct arm_pmu *cpu_pmu)
{
unsigned long pmnc;
struct perf_sample_data data;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
struct pt_regs *regs;
int idx;
@ -489,11 +488,10 @@ xscale2_pmnc_counter_has_overflowed(unsigned long of_flags,
}
static irqreturn_t
xscale2pmu_handle_irq(int irq_num, void *dev)
xscale2pmu_handle_irq(struct arm_pmu *cpu_pmu)
{
unsigned long pmnc, of_flags;
struct perf_sample_data data;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
struct pt_regs *regs;
int idx;

3
arch/arm64/kernel/perf_event.c
View File

@ -670,11 +670,10 @@ static void armv8pmu_disable_event(struct perf_event *event)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
static irqreturn_t armv8pmu_handle_irq(int irq_num, void *dev)
static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu)
{
u32 pmovsr;
struct perf_sample_data data;
struct arm_pmu *cpu_pmu = (struct arm_pmu *)dev;
struct pmu_hw_events *cpuc = this_cpu_ptr(cpu_pmu->hw_events);
struct pt_regs *regs;
int idx;

2
drivers/perf/arm_pmu.c
View File

@ -339,7 +339,7 @@ static irqreturn_t armpmu_dispatch_irq(int irq, void *dev)
return IRQ_NONE;
start_clock = sched_clock();
ret = armpmu->handle_irq(irq, armpmu);
ret = armpmu->handle_irq(armpmu);
finish_clock = sched_clock();
perf_sample_event_took(finish_clock - start_clock);

2
include/linux/perf/arm_pmu.h
View File

@ -78,7 +78,7 @@ struct arm_pmu {
struct pmu pmu;
cpumask_t supported_cpus;
char *name;
irqreturn_t (*handle_irq)(int irq_num, void *dev);
irqreturn_t (*handle_irq)(struct arm_pmu *pmu);
void (*enable)(struct perf_event *event);
void (*disable)(struct perf_event *event);
int (*get_event_idx)(struct pmu_hw_events *hw_events,