The branch main has been updated by jhb:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=2ad93a4f6b034b18e3be98d1aa71d200da659f6c

commit 2ad93a4f6b034b18e3be98d1aa71d200da659f6c
Author:     John Baldwin <[email protected]>
AuthorDate: 2022-04-12 21:58:58 +0000
Commit:     John Baldwin <[email protected]>
CommitDate: 2022-04-12 21:58:58 +0000

    grackle badaddr: Use void casts instead of a dummy variable.
---
 sys/powerpc/powermac/grackle.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sys/powerpc/powermac/grackle.c b/sys/powerpc/powermac/grackle.c
index d3eb9ded1736..06b5992e99a0 100644
--- a/sys/powerpc/powermac/grackle.c
+++ b/sys/powerpc/powermac/grackle.c
@@ -243,7 +243,6 @@ badaddr(void *addr, size_t size)
 {
        struct thread   *td;
        jmp_buf         env, *oldfaultbuf;
-       int             x;
 
        /* Get rid of any stale machine checks that have been waiting.  */
        __asm __volatile ("sync; isync");
@@ -262,13 +261,13 @@ badaddr(void *addr, size_t size)
 
        switch (size) {
        case 1:
-               x = *(volatile int8_t *)addr;
+               (void)*(volatile int8_t *)addr;
                break;
        case 2:
-               x = *(volatile int16_t *)addr;
+               (void)*(volatile int16_t *)addr;
                break;
        case 4:
-               x = *(volatile int32_t *)addr;
+               (void)*(volatile int32_t *)addr;
                break;
        default:
                panic("badaddr: invalid size (%zd)", size);

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