The branch main has been updated by imp:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=1545c66789d3d235dedfb85694cd9b6d0650833d

commit 1545c66789d3d235dedfb85694cd9b6d0650833d
Author:     Warner Losh <[email protected]>
AuthorDate: 2022-04-06 01:59:18 +0000
Commit:     Warner Losh <[email protected]>
CommitDate: 2022-04-06 03:42:05 +0000

    hwpmc_arm64: remove write only variables and the computations they do
    
    Sponsored by:           Netflix
---
 sys/dev/hwpmc/hwpmc_arm64.c    | 11 -----------
 sys/dev/hwpmc/hwpmc_arm64_md.c |  2 --
 2 files changed, 13 deletions(-)

diff --git a/sys/dev/hwpmc/hwpmc_arm64.c b/sys/dev/hwpmc/hwpmc_arm64.c
index 9cdb2bfc06cb..e2609dfcb474 100644
--- a/sys/dev/hwpmc/hwpmc_arm64.c
+++ b/sys/dev/hwpmc/hwpmc_arm64.c
@@ -165,7 +165,6 @@ arm64_allocate_pmc(int cpu, int ri, struct pmc *pm,
   const struct pmc_op_pmcallocate *a)
 {
        uint32_t config;
-       struct arm64_cpu *pac;
        enum pmc_event pe;
 
        KASSERT(cpu >= 0 && cpu < pmc_cpu_max(),
@@ -173,8 +172,6 @@ arm64_allocate_pmc(int cpu, int ri, struct pmc *pm,
        KASSERT(ri >= 0 && ri < arm64_npmcs,
            ("[arm64,%d] illegal row index %d", __LINE__, ri));
 
-       pac = arm64_pcpu[cpu];
-
        if (a->pm_class != PMC_CLASS_ARMV8) {
                return (EINVAL);
        }
@@ -337,12 +334,6 @@ arm64_start_pmc(int cpu, int ri)
 static int
 arm64_stop_pmc(int cpu, int ri)
 {
-       struct pmc_hw *phw;
-       struct pmc *pm;
-
-       phw    = &arm64_pcpu[cpu]->pc_arm64pmcs[ri];
-       pm     = phw->phw_pmc;
-
        /*
         * Disable the PMCs.
         */
@@ -372,7 +363,6 @@ arm64_release_pmc(int cpu, int ri, struct pmc *pmc)
 static int
 arm64_intr(struct trapframe *tf)
 {
-       struct arm64_cpu *pc;
        int retval, ri;
        struct pmc *pm;
        int error;
@@ -386,7 +376,6 @@ arm64_intr(struct trapframe *tf)
            TRAPF_USERMODE(tf));
 
        retval = 0;
-       pc = arm64_pcpu[cpu];
 
        for (ri = 0; ri < arm64_npmcs; ri++) {
                pm = arm64_pcpu[cpu]->pc_arm64pmcs[ri].phw_pmc;
diff --git a/sys/dev/hwpmc/hwpmc_arm64_md.c b/sys/dev/hwpmc/hwpmc_arm64_md.c
index e343d81d5172..4007b5840843 100644
--- a/sys/dev/hwpmc/hwpmc_arm64_md.c
+++ b/sys/dev/hwpmc/hwpmc_arm64_md.c
@@ -112,13 +112,11 @@ pmc_save_user_callchain(uintptr_t *cc, int maxsamples,
     struct trapframe *tf)
 {
        uintptr_t pc, r, oldfp, fp;
-       struct thread *td;
        int count;
 
        KASSERT(TRAPF_USERMODE(tf), ("[arm64,%d] Not a user trap frame tf=%p",
            __LINE__, (void *) tf));
 
-       td = curthread;
        pc = PMC_TRAPFRAME_TO_PC(tf);
        *cc++ = pc;
 

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