[Bug 193076] New: [build] if_vmx fails to build on stable/10

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193076

            Bug ID: 193076
           Summary: [build] if_vmx fails to build on stable/10
           Product: Base System
           Version: 10.0-STABLE
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: ngie at FreeBSD.org

if_vmx compiles cleanly on CURRENT, but not on stable/10 as noted below.

Repro:

/bin/sh
cat > src.conf <<'EOF'
MALLOC_PRODUCTION=

WITHOUT_ATM=
WITHOUT_AUDIT=
WITHOUT_BHYVE=
WITHOUT_BIND_DNSSEC=
WITHOUT_BIND_ETC=
WITHOUT_BIND_LIBS_LWRES=
WITHOUT_BIND_NAMED=
WITHOUT_BLUETOOTH=
WITHOUT_BSNMP=
WITHOUT_CALENDAR=
WITHOUT_CLANG=
WITHOUT_CLANG_BOOTSTRAP=
WITHOUT_CLANG_IS_CC=
WITHOUT_CTM=
WITHOUT_FORTRAN=
WITHOUT_FREEBSD_UPDATE=
WITHOUT_GAMES=
WITH_GCC=
WITHOUT_GCOV=
WITH_GNUCXX=
WITHOUT_GPIB=
WITHOUT_HAST=
WITHOUT_HESOID=
WITHOUT_HTML=
WITHOUT_I4B=
WITH_ICONV=
WITHOUT_IPFILTER=
WITHOUT_IPFW=
WITHOUT_IPX=
WITHOUT_LIBKSE=
WITHOUT_LPR=
WITHOUT_MAIL=
WITHOUT_NCP=
WITHOUT_NDIS=
WITHOUT_NIS=
WITH_NLS=
WITHOUT_NS_CACHING=
WITHOUT_OBJC=
WITHOUT_PF=
WITHOUT_PORTSNAP=
WITHOUT_PPP=
WITHOUT_PROFILE=
WITHOUT_RADIUS=
WITHOUT_RCMDS=
WITH_SSP=
WITHOUT_SVN=
WITHOUT_SVNLITE=
WITHOUT_SYSINSTALL=
WITH_TESTS=
WITHOUT_WIRELESS=
WITHOUT_WPA_SUPPLICANT_EAPOL=
WITH_ZFS=
EOF

(
echo "include GENERIC";
echo "device vmx";
) > MY_GENERIC

export KERNCONFDIR=$PWD KERNCONF=MY_GENERIC SRCCONF=$PWD/src.conf
make buildworld
make buildkernel

Expected result:

The compile should complete cleanly.

Actual result:

gcc fails to compile the module with -Wuninitialized.

cc1: warnings being treated as errors
/usr/src.svn/sys/dev/vmware/vmxnet3/if_vmx.c: In function
'vmxnet3_txq_mq_start_locked':
/usr/src.svn/sys/dev/vmware/vmxnet3/if_vmx.c:2625: warning: 'ip6' may be used
uninitialized in this function
/usr/src.svn/sys/dev/vmware/vmxnet3/if_vmx.c:2625: note: 'ip6' was declared
here
/usr/src.svn/sys/dev/vmware/vmxnet3/if_vmx.c:2622: warning: 'ip' may be used
uninitialized in this function
/usr/src.svn/sys/dev/vmware/vmxnet3/if_vmx.c:2622: note: 'ip' was declared here

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