netbsd-7 kernel build failure

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

A netbsd-7 kernel build from today's sources with -Os errors out with

#   compile  P3B-F/drmfb_pci.o
/u/netbsd-builds/7/i386/tools/bin/i486--netbsdelf-gcc -msoft-float 
-mno-mmx -mno-sse -mno-avx -ffreestanding -fno-zero-initialized-in-bss 
-pipe -Os -march=pentium3 -fstack-protector -Wstack-protector --param 
ssp-buffer-size=1 -fno-strict-aliasing -fno-common -std=gnu99 -Werror 
-Wall -Wno-main -Wno-format-zero-length -Wpointer-arith 
-Wmissing-prototypes -Wstrict-prototypes -Wold-style-definition -Wswitch 
-Wshadow -Wcast-qual -Wwrite-strings -Wno-unreachable-code 
-Wno-pointer-sign -Wno-attributes -Wextra -Wno-unused-parameter 
-Wold-style-definition -Wno-sign-compare 
--sysroot=/u/netbsd-builds/7/i386/destdir -Di386 -I. 
-I/public/netbsd-7/sys/../common/include -I/public/netbsd-7/sys/arch 
-I/public/netbsd-7/sys -nostdinc -DP1003_1B_SEMAPHORE -DMAXUSERS=64 
-D_KERNEL -D_KERNEL_OPT -std=gnu99 
-I/public/netbsd-7/sys/lib/libkern/../../../common/lib/libc/quad 
-I/public/netbsd-7/sys/lib/libkern/../../../common/lib/libc/string 
-I/public/netbsd-7/sys/lib/libkern/../../../common/lib/libc/arch/i386/string 
-D_FORTIFY_SOURCE=2 -I/public/netbsd-7/sys/external/bsd/drm2/include 
-I/public/netbsd-7/sys/external/bsd/common/include 
-I/public/netbsd-7/sys/external/bsd/drm2/include 
-I/public/netbsd-7/sys/external/bsd/drm2/include/drm 
-I/public/netbsd-7/sys/external/bsd/drm2/dist 
-I/public/netbsd-7/sys/external/bsd/drm2/dist/include 
-I/public/netbsd-7/sys/external/bsd/drm2/dist/include/drm 
-I/public/netbsd-7/sys/external/bsd/drm2/dist/uapi 
-I/public/netbsd-7/sys/external/bsd/common/include -D__KERNEL__ 
-I/public/netbsd-7/sys/../common/include -DCONFIG_AGP 
-I/public/netbsd-7/sys/external/bsd/drm2/dist/drm/i915 
-I/public/netbsd-7/sys/external/bsd/drm2/i915drm -DCONFIG_DRM_I915_FBDEV 
-I/public/netbsd-7/sys/external/bsd/drm2/dist/drm/radeon 
-I/public/netbsd-7/sys/external/bsd/drm2/include/radeon 
-I/public/netbsd-7/sys/external/bsd/drm2/radeon 
-I/public/netbsd-7/sys/external/bsd/acpica/dist/include -c 
/public/netbsd-7/sys/external/bsd/drm2/pci/drmfb_pci.c
--- drm_scatter.o ---
/public/netbsd-7/sys/external/bsd/drm2/drm/drm_scatter.c: In function 
'drm_sg_alloc':
/public/netbsd-7/sys/external/bsd/drm2/drm/drm_scatter.c:83:10: error: 
'sg' may be used uninitialized in this function 
[-Werror=maybe-uninitialized]
  dev->sg = sg;
          ^
cc1: all warnings being treated as errors
*** [drm_scatter.o] Error code 1

nbmake: stopped in /var/obj/netbsd-builds/7/i386/sys/arch/i386/compile/P3B-F
1 error

drm_sg_alloc_mem() sets up sg, but the compiler cannot know, I guess.

hauke

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