diff --git a/sys/dev/hwpmc/hwpmc_mpc7xxx.c b/sys/dev/hwpmc/hwpmc_mpc7xxx.c
index c62c0791af0..799e997829c 100644
--- a/sys/dev/hwpmc/hwpmc_mpc7xxx.c
+++ b/sys/dev/hwpmc/hwpmc_mpc7xxx.c
@@ -348,17 +348,11 @@ mpc7xxx_pmcn_write(unsigned int pmc, uint32_t val)
 static void
 mpc7xxx_set_pmc(int cpu, int ri, int config)
 {
-	struct pmc *pm;
-	struct pmc_hw *phw;
 	register_t pmc_mmcr;
-	uint32_t config_mask;
 
-	phw    = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri];
-	pm     = phw->phw_pmc;
 	/* The mask is inverted (enable is 1) compared to the flags in
 	 * MMCR0, which are Freeze flags.
 	 */
-	config_mask = ~config & POWERPC_PMC_ENABLE;
 	config &= ~POWERPC_PMC_ENABLE;
 
 	/* Enable/disable the PMC. */
diff --git a/sys/dev/hwpmc/hwpmc_ppc970.c b/sys/dev/hwpmc/hwpmc_ppc970.c
index 3e92c4dc6aa..b3786f3b667 100644
--- a/sys/dev/hwpmc/hwpmc_ppc970.c
+++ b/sys/dev/hwpmc/hwpmc_ppc970.c
@@ -256,14 +256,9 @@ static size_t ppc970_event_codes_size = nitems(ppc970_event_codes);
 static void
 ppc970_set_pmc(int cpu, int ri, int config)
 {
-	struct pmc *pm;
-	struct pmc_hw *phw;
 	register_t pmc_mmcr;
 	int config_mask;
 
-	phw = &powerpc_pcpu[cpu]->pc_ppcpmcs[ri];
-	pm = phw->phw_pmc;
-
 	if (config == PMCN_NONE)
 		config = PMC970N_NONE;