The branch main has been updated by jhb:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=7c1ff7146b7a4474dff370af0c5a5d238a8ff6c6

commit 7c1ff7146b7a4474dff370af0c5a5d238a8ff6c6
Author:     John Baldwin <[email protected]>
AuthorDate: 2022-04-18 19:08:35 +0000
Commit:     John Baldwin <[email protected]>
CommitDate: 2022-04-18 19:08:35 +0000

    powerpc cpu_idle_60x: Move some variables fully under #ifdef AIM.
    
    Reviewed by:    jhibbits
    Differential Revision:  https://reviews.freebsd.org/D34905
---
 sys/powerpc/powerpc/cpu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sys/powerpc/powerpc/cpu.c b/sys/powerpc/powerpc/cpu.c
index d1fc89b410eb..bc70d39676ef 100644
--- a/sys/powerpc/powerpc/cpu.c
+++ b/sys/powerpc/powerpc/cpu.c
@@ -737,16 +737,18 @@ cpu_idle(int busy)
 static void
 cpu_idle_60x(sbintime_t sbt)
 {
+#ifdef AIM
        register_t msr;
        uint16_t vers;
+#endif
 
        if (!powerpc_pow_enabled)
                return;
 
+#ifdef AIM
        msr = mfmsr();
        vers = mfpvr() >> 16;
 
-#ifdef AIM
        switch (vers) {
        case IBM970:
        case IBM970FX:

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