sys/arm/broadcom/bcm2835/bcm2838_xhci.c:184:21: error: variable 'sc' set but not used [-Werror,-Wunused-but-set-variable]

In attempting to update from main-n253904-4d1ba6febfa7 based to
main-n255108-9fb40baf6043 based, targeting aarch64, the following
code from sys/arm/broadcom/bcm2835/bcm2838_xhci.c was rejected:

static int
bcm_xhci_attach(device_t dev)
{
        struct xhci_softc *sc;
        int error;

        sc = device_get_softc(dev);

        bcm_xhci_install_xhci_firmware(dev);

        error = xhci_pci_attach(dev);
        return (error);
}

as follows:

--- bcm2838_xhci.o ---
/usr/main-src/sys/arm/broadcom/bcm2835/bcm2838_xhci.c:184:21: error: variable 'sc' set but not used [-Werror,-Wunused-but-set-variable]
        struct xhci_softc *sc;
                           ^
Building /usr/obj/BUILDs/main-CA72-nodbg-clang/usr/main-src/arm64.aarch64/sys/GENERIC-NODBG-CA72/imx_i2c.o
1 error generated.
*** [bcm2838_xhci.o] Error code 1

make[2]: stopped in /usr/obj/BUILDs/main-CA72-nodbg-clang/usr/main-src/arm64.aarch64/sys/GENERIC-NODBG-CA72
.ERROR_TARGET='bcm2838_xhci.o'
.ERROR_META_FILE='/usr/obj/BUILDs/main-CA72-nodbg-clang/usr/main-src/arm64.aarch64/sys/GENERIC-NODBG-CA72/bcm2838_xhci.o.meta'
.MAKE.LEVEL='2'
MAKEFILE=''
.MAKE.MODE='meta missing-filemon=yes missing-meta=yes silent=yes verbose curdirOk=yes'
_ERROR_CMD='cc -target aarch64-unknown-freebsd14.0 --sysroot=/usr/obj/BUILDs/main-CA72-nodbg-clang/usr/main-src/arm64.aarch64/tmp -B/usr/obj/BUILDs/main-CA72-nodbg-clang/usr/main-src/arm64.aarch64/tmp/usr/bin -c -O2 -pipe  -fno-strict-aliasing  -g -nostdinc  -I. -I/usr/main-src/sys -I/usr/main-src/sys/contrib/ck/include -I/usr/main-src/sys/contrib/libfdt -I/usr/main-src/sys/contrib/device-tree/include -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common   -mcpu=cortex-a72 -DLINUX_DTS_VERSION=\""5.13"\" -mstack-protector-guard=sysreg -mstack-protector-guard-reg=sp_el0 -mstack-protector-guard-offset=0 -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer -fdebug-prefix-map=./machine=/usr/main-src/sys/arm64/include -mgeneral-regs-only -ffixed-x18 -ffreestanding -fwrapv -fstack-protector -Wall -Wnested-externs -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wcast-qual -Wundef -Wno-pointer-sign -D__printf__=__freebsd_kprintf__ -Wmissing-include-dirs -fdiagnostics-show-option -Wno-unknown-pragmas -Wno-error=tautological-compare -Wno-error=empty-body -Wno-error=parentheses-equality -Wno-error=unused-function -Wno-error=pointer-sign -Wno-error=shift-negative-value -Wno-address-of-packed-member -Wno-format-zero-length   -mcpu=cortex-a72  -std=iso9899:1999 -Werror /usr/main-src/sys/arm/broadcom/bcm2835/bcm2838_xhci.c; ctfconvert -L VERSION -g bcm2838_xhci.o;'
.CURDIR='/usr/obj/BUILDs/main-CA72-nodbg-clang/usr/main-src/arm64.aarch64/sys/GENERIC-NODBG-CA72'
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SRCTOP='/usr/main-src'
OBJTOP='/usr/main-src'
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.PATH='. /usr/obj/BUILDs/main-CA72-nodbg-clang/usr/main-src/arm64.aarch64/sys/GENERIC-NODBG-CA72'
1 error


===
Mark Millard
marklmi at yahoo.com