git: dd70f2b48c9c - stable/13 - hwpmc_arm64: plug memory leak

The branch stable/13 has been updated by mhorne:

URL: https://cgit.FreeBSD.org/src/commit/?id=dd70f2b48c9c0235e52721c2a6930285c3b6939e

commit dd70f2b48c9c0235e52721c2a6930285c3b6939e
Author:     Mitchell Horne <mhorne@FreeBSD.org>
AuthorDate: 2023-08-03 14:09:48 +0000
Commit:     Mitchell Horne <mhorne@FreeBSD.org>
CommitDate: 2023-09-11 22:43:59 +0000

    hwpmc_arm64: plug memory leak
    
    Free allocated per-CPU structures in the pcpu_fini and finalize methods.
    
    While here, add debug trace entries to these methods.
    
    Reviewed by:    jkoshy, andrew
    MFC after:      1 week
    Sponsored by:   The FreeBSD Foundation
    Differential Revision:  https://reviews.freebsd.org/D41268
    
    (cherry picked from commit 8bdceaecabd91ce5ed23646d91cef878681e19d6)
---
 sys/dev/hwpmc/hwpmc_arm64.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/sys/dev/hwpmc/hwpmc_arm64.c b/sys/dev/hwpmc/hwpmc_arm64.c
index f0a487cf7d21..65f55108cecb 100644
--- a/sys/dev/hwpmc/hwpmc_arm64.c
+++ b/sys/dev/hwpmc/hwpmc_arm64.c
@@ -452,7 +452,7 @@ arm64_pcpu_init(struct pmc_mdep *md, int cpu)
 
 	KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
 	    ("[arm64,%d] wrong cpu number %d", __LINE__, cpu));
-	PMCDBG1(MDP, INI, 1, "arm64-init cpu=%d", cpu);
+	PMCDBG0(MDP, INI, 1, "arm64-pcpu-init");
 
 	arm64_pcpu[cpu] = pac = malloc(sizeof(struct arm64_cpu), M_PMC,
 	    M_WAITOK | M_ZERO);
@@ -493,10 +493,16 @@ arm64_pcpu_fini(struct pmc_mdep *md, int cpu)
 {
 	uint32_t pmcr;
 
+	PMCDBG0(MDP, INI, 1, "arm64-pcpu-fini");
+
 	pmcr = arm64_pmcr_read();
 	pmcr &= ~PMCR_E;
 	arm64_pmcr_write(pmcr);
 
+	free(arm64_pcpu[cpu]->pc_arm64pmcs, M_PMC);
+	free(arm64_pcpu[cpu], M_PMC);
+	arm64_pcpu[cpu] = NULL;
+
 	return (0);
 }
 
@@ -588,5 +594,7 @@ pmc_arm64_initialize(void)
 void
 pmc_arm64_finalize(struct pmc_mdep *md)
 {
+	PMCDBG0(MDP, INI, 1, "arm64-finalize");
 
+	free(arm64_pcpu, M_PMC);
 }