The branch main has been updated by mjg:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=17ad5b249dd79de8c4b4d7939f8165a07c114ac7

commit 17ad5b249dd79de8c4b4d7939f8165a07c114ac7
Author:     Mateusz Guzik <[email protected]>
AuthorDate: 2021-12-14 14:31:10 +0000
Commit:     Mateusz Guzik <[email protected]>
CommitDate: 2021-12-14 14:31:10 +0000

    sis: plug set-but-not-used vars
    
    Sponsored by:   Rubicon Communications, LLC ("Netgate")
---
 sys/dev/sis/if_sis.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sys/dev/sis/if_sis.c b/sys/dev/sis/if_sis.c
index b4cc9e38a653..ecc42e991df4 100644
--- a/sys/dev/sis/if_sis.c
+++ b/sys/dev/sis/if_sis.c
@@ -2372,12 +2372,10 @@ sis_add_sysctls(struct sis_softc *sc)
 {
        struct sysctl_ctx_list *ctx;
        struct sysctl_oid_list *children;
-       int unit;
 
        ctx = device_get_sysctl_ctx(sc->sis_dev);
        children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->sis_dev));
 
-       unit = device_get_unit(sc->sis_dev);
        /*
         * Unlike most other controllers, NS DP83815/DP83816 controllers
         * seem to pad with 0xFF when it encounter short frames.  According

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