From 3f7395c382040f0cf274fd6fac35519b800afc19 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 16 Nov 2022 22:40:17 +0100
Subject: [PATCH] perf: Fix function pointer case
commit 1af6239d1d3e61d33fd2f0ba53d3d1a67cc50574 upstream.
With the advent of CFI it is no longer acceptible to cast function
pointers.
The robot complains thusly:
kernel-events-core.c:warning:cast-from-int-(-)(struct-perf_cpu_pmu_context-)-to-remote_function_f-(aka-int-(-)(void-)-)-converts-to-incompatible-function-type
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Cixi Geng <cixi.geng1@unisoc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
kernel/events/core.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 53f36bbaf0c6..8c5400fd227b 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -1222,6 +1222,11 @@ static int perf_mux_hrtimer_restart(struct perf_cpu_context *cpuctx)
return 0;
}
+static int perf_mux_hrtimer_restart_ipi(void *arg)
+{
+ return perf_mux_hrtimer_restart(arg);
+}
+
void perf_pmu_disable(struct pmu *pmu)
{
int *count = this_cpu_ptr(pmu->pmu_disable_count);
@@ -10772,8 +10777,7 @@ perf_event_mux_interval_ms_store(struct device *dev,
cpuctx = per_cpu_ptr(pmu->pmu_cpu_context, cpu);
cpuctx->hrtimer_interval = ns_to_ktime(NSEC_PER_MSEC * timer);
- cpu_function_call(cpu,
- (remote_function_f)perf_mux_hrtimer_restart, cpuctx);
+ cpu_function_call(cpu, perf_mux_hrtimer_restart_ipi, cpuctx);
}
cpus_read_unlock();
mutex_unlock(&mux_interval_mutex);