Index: head/sys/conf/kern.mk
===================================================================
--- head/sys/conf/kern.mk	(revision 282206)
+++ head/sys/conf/kern.mk	(revision 282207)
@@ -1,219 +1,219 @@
 # $FreeBSD$
 
 #
 # Warning flags for compiling the kernel and components of the kernel:
 #
 CWARNFLAGS?=	-Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes \
 		-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual \
 		-Wundef -Wno-pointer-sign ${FORMAT_EXTENSIONS} \
 		-Wmissing-include-dirs -fdiagnostics-show-option \
 		-Wno-unknown-pragmas \
 		${CWARNEXTRA}
 #
 # The following flags are next up for working on:
 #	-Wextra
 
 # Disable a few warnings for clang, since there are several places in the
 # kernel where fixing them is more trouble than it is worth, or where there is
 # a false positive.
 .if ${COMPILER_TYPE} == "clang"
 NO_WCONSTANT_CONVERSION=	-Wno-constant-conversion
 NO_WSHIFT_COUNT_NEGATIVE=	-Wno-shift-count-negative
 NO_WSHIFT_COUNT_OVERFLOW=	-Wno-shift-count-overflow
 NO_WSELF_ASSIGN=		-Wno-self-assign
 NO_WUNNEEDED_INTERNAL_DECL=	-Wno-unneeded-internal-declaration
 NO_WSOMETIMES_UNINITIALIZED=	-Wno-error-sometimes-uninitialized
 NO_WCAST_QUAL=			-Wno-cast-qual
 # Several other warnings which might be useful in some cases, but not severe
 # enough to error out the whole kernel build.  Display them anyway, so there is
 # some incentive to fix them eventually.
 CWARNEXTRA?=	-Wno-error-tautological-compare -Wno-error-empty-body \
 		-Wno-error-parentheses-equality -Wno-error-unused-function \
 		-Wno-error-pointer-sign
 
 CLANG_NO_IAS= -no-integrated-as
 .if ${COMPILER_VERSION} < 30500
 # XXX: clang < 3.5 integrated-as doesn't grok .codeNN directives
 CLANG_NO_IAS34= -no-integrated-as
 .endif
 .endif
 
 .if ${COMPILER_TYPE} == "gcc"
 .if ${COMPILER_VERSION} >= 40300
 # Catch-all for all the things that are in our tree, but for which we're
 # not yet ready for this compiler. Note: we likely only really "support"
 # building with gcc 4.8 and newer. Nothing older has been tested.
 CWARNEXTRA?=	-Wno-error=inline -Wno-error=enum-compare -Wno-error=unused-but-set-variable \
 		-Wno-error=aggressive-loop-optimizations -Wno-error=maybe-uninitialized \
 		-Wno-error=array-bounds -Wno-error=address \
 		-Wno-error=cast-qual -Wno-error=sequence-point -Wno-error=attributes \
 		-Wno-error=strict-overflow -Wno-error=overflow
 .else
 # For gcc 4.2, eliminate the too-often-wrong warnings about uninitialized vars.
 CWARNEXTRA?=	-Wno-uninitialized
 .endif
 .endif
 
 # External compilers may not support our format extensions.  Allow them
 # to be disabled.  WARNING: format checking is disabled in this case.
 .if ${MK_FORMAT_EXTENSIONS} == "no"
 FORMAT_EXTENSIONS=	-Wno-format
 .elif ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
 .else
 FORMAT_EXTENSIONS=	-fformat-extensions
 .endif
 
 #
 # On i386, do not align the stack to 16-byte boundaries.  Otherwise GCC 2.95
 # and above adds code to the entry and exit point of every function to align the
 # stack to 16-byte boundaries -- thus wasting approximately 12 bytes of stack
 # per function call.  While the 16-byte alignment may benefit micro benchmarks,
 # it is probably an overall loss as it makes the code bigger (less efficient
 # use of code cache tag lines) and uses more stack (less efficient use of data
 # cache tag lines).  Explicitly prohibit the use of FPU, SSE and other SIMD
 # operations inside the kernel itself.  These operations are exclusively
 # reserved for user applications.
 #
 # gcc:
 # Setting -mno-mmx implies -mno-3dnow
 # Setting -mno-sse implies -mno-sse2, -mno-sse3 and -mno-ssse3
 #
 # clang:
 # Setting -mno-mmx implies -mno-3dnow and -mno-3dnowa
 # Setting -mno-sse implies -mno-sse2, -mno-sse3, -mno-ssse3, -mno-sse41 and -mno-sse42
 #
 .if ${MACHINE_CPUARCH} == "i386"
 CFLAGS.gcc+=	-mno-align-long-strings -mpreferred-stack-boundary=2
 CFLAGS.clang+=	-mno-aes -mno-avx
 CFLAGS+=	-mno-mmx -mno-sse -msoft-float
 INLINE_LIMIT?=	8000
 .endif
 
 .if ${MACHINE_CPUARCH} == "arm"
 INLINE_LIMIT?=	8000
 .endif
 
 #
 # For sparc64 we want the medany code model so modules may be located
 # anywhere in the 64-bit address space.  We also tell GCC to use floating
 # point emulation.  This avoids using floating point registers for integer
 # operations which it has a tendency to do.
 #
 .if ${MACHINE_CPUARCH} == "sparc64"
 CFLAGS.clang+=	-mcmodel=large -fno-dwarf2-cfi-asm
 CFLAGS.gcc+=	-mcmodel=medany -msoft-float
 INLINE_LIMIT?=	15000
 .endif
 
 #
 # For AMD64, we explicitly prohibit the use of FPU, SSE and other SIMD
 # operations inside the kernel itself.  These operations are exclusively
 # reserved for user applications.
 #
 # gcc:
 # Setting -mno-mmx implies -mno-3dnow
 # Setting -mno-sse implies -mno-sse2, -mno-sse3, -mno-ssse3 and -mfpmath=387
 #
 # clang:
 # Setting -mno-mmx implies -mno-3dnow and -mno-3dnowa
 # Setting -mno-sse implies -mno-sse2, -mno-sse3, -mno-ssse3, -mno-sse41 and -mno-sse42
 # (-mfpmath= is not supported)
 #
 .if ${MACHINE_CPUARCH} == "amd64"
 CFLAGS.clang+=	-mno-aes -mno-avx
 CFLAGS+=	-mcmodel=kernel -mno-red-zone -mno-mmx -mno-sse -msoft-float \
 		-fno-asynchronous-unwind-tables
 INLINE_LIMIT?=	8000
 .endif
 
 #
 # For PowerPC we tell gcc to use floating point emulation.  This avoids using
 # floating point registers for integer operations which it has a tendency to do.
 # Also explicitly disable Altivec instructions inside the kernel.
 #
 .if ${MACHINE_CPUARCH} == "powerpc"
 CFLAGS+=	-mno-altivec
 CFLAGS.clang+=	-mllvm -disable-ppc-float-in-variadic=true
 CFLAGS.gcc+=	-msoft-float
 INLINE_LIMIT?=	15000
 .endif
 
 #
 # Use dot symbols on powerpc64 to make ddb happy
 #
 .if ${MACHINE_ARCH} == "powerpc64"
 CFLAGS.gcc+=	-mcall-aixdesc
 .endif
 
 #
 # For MIPS we also tell gcc to use floating point emulation
 #
 .if ${MACHINE_CPUARCH} == "mips"
 CFLAGS+=	-msoft-float
 INLINE_LIMIT?=	8000
 .endif
 
 #
 # GCC 3.0 and above like to do certain optimizations based on the
 # assumption that the program is linked against libc.  Stop this.
 #
 CFLAGS+=	-ffreestanding
 
 #
 # The C standard leaves signed integer overflow behavior undefined.
 # gcc and clang opimizers take advantage of this.  The kernel makes
 # use of signed integer wraparound mechanics so we need the compiler
 # to treat it as a wraparound and not take shortcuts.
 # 
 CFLAGS+=	-fwrapv
 
 #
 # GCC SSP support
 #
 .if ${MK_SSP} != "no" && \
     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 CFLAGS+=	-fstack-protector
 .endif
 
 #
 # Add -gdwarf-2 when compiling -g. The default starting in clang v3.4
 # and gcc 4.8 is to generate DWARF version 4. However, our tools don't
 # cope well with DWARF 4, so force it to genereate DWARF2, which they
 # understand. Do this unconditionally as it is harmless when not needed,
 # but critical for these newer versions.
 #
 .if ${CFLAGS:M-g} != "" && ${CFLAGS:M-gdwarf*} == ""
 CFLAGS+=	-gdwarf-2
 .endif
 
-CFLAGS+= ${CWARNEXTRA} ${CWARNFLAGS} ${CWARNFLAGS.${.IMPSRC:T}}
+CFLAGS+= ${CWARNFLAGS} ${CWARNFLAGS.${.IMPSRC:T}}
 CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} ${CFLAGS.${.IMPSRC:T}}
 
 # Tell bmake not to mistake standard targets for things to be searched for
 # or expect to ever be up-to-date.
 PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \
 		beforelinking build build-tools buildfiles buildincludes \
 		checkdpadd clean cleandepend cleandir cleanobj configure \
 		depend dependall distclean distribute exe \
 		html includes install installfiles installincludes lint \
 		obj objlink objs objwarn realall realdepend \
 		realinstall regress subdir-all subdir-depend subdir-install \
 		tags whereobj
 
 .PHONY: ${PHONY_NOTMAIN}
 .NOTMAIN: ${PHONY_NOTMAIN}
 
 CSTD=		c99
 
 .if ${CSTD} == "k&r"
 CFLAGS+=        -traditional
 .elif ${CSTD} == "c89" || ${CSTD} == "c90"
 CFLAGS+=        -std=iso9899:1990
 .elif ${CSTD} == "c94" || ${CSTD} == "c95"
 CFLAGS+=        -std=iso9899:199409
 .elif ${CSTD} == "c99"
 CFLAGS+=        -std=iso9899:1999
 .else # CSTD
 CFLAGS+=        -std=${CSTD}
 .endif # CSTD
Index: head/sys/conf/kern.pre.mk
===================================================================
--- head/sys/conf/kern.pre.mk	(revision 282206)
+++ head/sys/conf/kern.pre.mk	(revision 282207)
@@ -1,200 +1,200 @@
 # $FreeBSD$
 
 # Part of a unified Makefile for building kernels.  This part contains all
 # of the definitions that need to be before %BEFORE_DEPEND.
 
 # Allow user to configure things that only effect src tree builds.
 # Note: This is duplicated from src.sys.mk to ensure that we include
 # /etc/src.conf when building the kernel. Kernels can be built without
 # the rest of /usr/src, but they still always process SRCCONF even though
 # the normal mechanisms to prevent that (compiling out of tree) won't
 # work. To ensure they do work, we have to duplicate thee few lines here.
 SRCCONF?=	/etc/src.conf
 .if (exists(${SRCCONF}) || ${SRCCONF} != "/etc/src.conf") && !target(_srcconf_included_)
 .include "${SRCCONF}"
 _srcconf_included_:
 .endif
 
 .include <bsd.own.mk>
 .include <bsd.compiler.mk>
 .include "kern.opts.mk"
 
 # Can be overridden by makeoptions or /etc/make.conf
 KERNEL_KO?=	kernel
 KERNEL?=	kernel
 KODIR?=		/boot/${KERNEL}
 LDSCRIPT_NAME?=	ldscript.$M
 LDSCRIPT?=	$S/conf/${LDSCRIPT_NAME}
 
 M=		${MACHINE}
 
 AWK?=		awk
 CP?=		cp
 LINT?=		lint
 NM?=		nm
 OBJCOPY?=	objcopy
 SIZE?=		size
 
 .if defined(DEBUG)
 _MINUS_O=	-O
 CTFFLAGS+=	-g
 .else
 .if ${MACHINE_CPUARCH} == "powerpc"
 _MINUS_O=	-O	# gcc miscompiles some code at -O2
 .else
 _MINUS_O=	-O2
 .endif
 .endif
 .if ${MACHINE_CPUARCH} == "amd64"
 .if ${COMPILER_TYPE} == "clang"
 COPTFLAGS?=-O2 -pipe
 .else
 COPTFLAGS?=-O2 -frename-registers -pipe
 .endif
 .else
 COPTFLAGS?=${_MINUS_O} -pipe
 .endif
 .if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
 COPTFLAGS+= -fno-strict-aliasing
 .endif
 .if !defined(NO_CPU_COPTFLAGS)
 COPTFLAGS+= ${_CPUCFLAGS}
 .endif
 NOSTDINC= -nostdinc
 
 INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S
 
 .if make(depend) || make(kernel-depend)
 
 # This hack lets us use the ipfilter code without spamming a new
 # include path into contrib'ed source files.
 INCLUDES+= -I$S/contrib/ipfilter
 
 # ... and the same for ath
 INCLUDES+= -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal
 
 # ... and the same for the NgATM stuff
 INCLUDES+= -I$S/contrib/ngatm
 
 # ... and the same for vchiq
 INCLUDES+= -I$S/contrib/vchiq
 
 # ... and the same for twa
 INCLUDES+= -I$S/dev/twa
 
 # ... and the same for cxgb and cxgbe
 INCLUDES+= -I$S/dev/cxgb -I$S/dev/cxgbe
 
 .endif
 
-CFLAGS=	${COPTFLAGS} ${DEBUG} ${CWARNFLAGS}
+CFLAGS=	${COPTFLAGS} ${DEBUG}
 CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
 CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
 CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
 .if ${MACHINE_CPUARCH} == "mips"
 CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000
 .endif
 CFLAGS.gcc+= -fno-common -fms-extensions -finline-limit=${INLINE_LIMIT}
 CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
 CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
 .if defined(CFLAGS_ARCH_PARAMS)
 CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
 .endif
 WERROR?= -Werror
 
 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
 ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}} 
 
 .if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
 CFLAGS+=	-DGPROF
 CFLAGS.gcc+=	-falign-functions=16
 .if ${PROFLEVEL} >= 2
 CFLAGS+=	-DGPROF4 -DGUPROF
 PROF=		-pg
 .if ${COMPILER_TYPE} == "gcc"
 PROF+=		-mprofiler-epilogue
 .endif
 .else
 PROF=		-pg
 .endif
 .endif
 DEFINED_PROF=	${PROF}
 
 # Put configuration-specific C flags last (except for ${PROF}) so that they
 # can override the others.
 CFLAGS+=	${CONF_CFLAGS}
 
 # Optional linting. This can be overridden in /etc/make.conf.
 LINTFLAGS=	${LINTOBJKERNFLAGS}
 
 NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
 NORMAL_S= ${CC} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
 PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
 NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
 
 NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
 	  ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
 
 NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
 NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
 	-o ${.TARGET} ${.ALLSRC:M*.fw}
 
 # Special flags for managing the compat compiles for ZFS
 ZFS_CFLAGS=	-DFREEBSD_NAMECACHE -DBUILDING_ZFS -nostdinc -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs -I$S/cddl/contrib/opensolaris/uts/common/zmod -I$S/cddl/contrib/opensolaris/uts/common -I$S -I$S/cddl/contrib/opensolaris/common/zfs -I$S/cddl/contrib/opensolaris/common ${CFLAGS} -Wno-unknown-pragmas -Wno-missing-prototypes -Wno-undef -Wno-strict-prototypes -Wno-cast-qual -Wno-parentheses -Wno-redundant-decls -Wno-missing-braces -Wno-uninitialized -Wno-unused -Wno-inline -Wno-switch -Wno-pointer-arith -Wno-unknown-pragmas
 ZFS_CFLAGS+=	-include $S/cddl/compat/opensolaris/sys/debug_compat.h
 ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
 ZFS_C=		${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
 ZFS_S=		${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
 
 .if ${MK_CTF} != "no"
 NORMAL_CTFCONVERT=	${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
 .elif ${MAKE_VERSION} >= 5201111300
 NORMAL_CTFCONVERT=
 .else
 NORMAL_CTFCONVERT=	@:
 .endif
 
 NORMAL_LINT=	${LINT} ${LINTFLAGS} ${CFLAGS:M-[DIU]*} ${.IMPSRC}
 
 # Infiniband C flags.  Correct include paths and omit errors that linux
 # does not honor.
 OFEDINCLUDES=	-I$S/ofed/include/
 OFEDNOERR=	-Wno-cast-qual -Wno-pointer-arith
 OFEDCFLAGS=	${CFLAGS:N-I*} ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
 OFED_C_NOIMP=	${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
 OFED_C=		${OFED_C_NOIMP} ${.IMPSRC}
 
 GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
 SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
 SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
 SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
 SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
 SYSTEM_OBJS+= hack.So
 SYSTEM_LD= @${LD} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} --no-warn-mismatch \
 	--warn-common --export-dynamic --dynamic-linker /red/herring \
 	-o ${.TARGET} -X ${SYSTEM_OBJS} vers.o
 SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
 	${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
 SYSTEM_DEP+= ${LDSCRIPT}
 
 # MKMODULESENV is set here so that port makefiles can augment
 # them.
 
 MKMODULESENV+=	MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
 MKMODULESENV+=	MACHINE_CPUARCH=${MACHINE_CPUARCH}
 MKMODULESENV+=	MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
 MKMODULESENV+=	MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
 .if (${KERN_IDENT} == LINT)
 MKMODULESENV+=	ALL_MODULES=LINT
 .endif
 .if defined(MODULES_OVERRIDE)
 MKMODULESENV+=	MODULES_OVERRIDE="${MODULES_OVERRIDE}"
 .endif
 .if defined(DEBUG)
 MKMODULESENV+=	DEBUG_FLAGS="${DEBUG}"
 .endif
 
 # Detect kernel config options that force stack frames to be turned on.
 DDB_ENABLED!=	grep DDB opt_ddb.h || true ; echo
 DTR_ENABLED!=	grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
 HWPMC_ENABLED!=	grep HWPMC opt_hwpmc_hooks.h || true ; echo