Buildresult: linus-rand/i386-randconfig/i386-gcc4.6 built on Aug 2 2018, 07:56

kisskb

Revisions | Branches | Compilers | Configs | Build Results | Build Failures |

Status:	Failed
Date/Time:	Aug 2 2018, 07:56
Duration:	0:05:38.337850
Builder:	ka2
Revision:	mm: do not initialize TLB stack vma's with vma_init() (`8b11ec1b5ffb54f71cb5a5e5c8c4d36e5d113085)`
Target:	linus-rand/i386-randconfig/i386-gcc4.6
Branch:	linus-rand
Compiler:	i386-gcc4.6 (i386-linux-gcc (GCC) 4.6.3)
Config:	randconfig (download)
Log:	Download original Possible errors FATAL: modpost: Section mismatches detected. make[2]: * [vmlinux.o] Error 1 make[1]: * [vmlinux] Error 2 make: * [sub-make] Error 2 Possible warnings (18) kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/apic/io_apic.c:1033:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized] sound/hda/hdac_regmap.c:282:16: warning: 'err' may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/e820.c:653:2: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/hw_breakpoint.c:361:20: warning: 'align' may be used uninitialized in this function [-Wuninitialized] drivers/dma-buf/reservation.c:207:2: warning: 'k' may be used uninitialized in this function [-Wuninitialized] drivers/dma-buf/reservation.c:210:7: warning: 'i' may be used uninitialized in this function [-Wuninitialized] sound/soc/codecs/da7219-aad.c:318:17: warning: 'pll_ctrl' may be used uninitialized in this function [-Wuninitialized] drivers/acpi/button.c:255:12: warning: 'acpi_button_state_seq_show' defined but not used [-Wunused-function] drivers/firmware/google/coreboot_table.c:102:9: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c:532:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] drivers/gpu/drm/bridge/cdns-dsi.c:1340:12: warning: 'cdns_dsi_resume' defined but not used [-Wunused-function] drivers/gpu/drm/bridge/cdns-dsi.c:1353:12: warning: 'cdns_dsi_suspend' defined but not used [-Wunused-function] drivers/gpu/drm/amd/amdgpu/soc15.c:532:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp] drivers/gpu/drm/amd/amdgpu/soc15.c:551:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp] WARNING: vmlinux.o(.text.unlikely+0x3bd4): Section mismatch in reference from the function percpu_setup_debug_store() to the function .init.text:cea_map_percpu_pages() Full Log # git rev-parse -q --verify 8b11ec1b5ffb54f71cb5a5e5c8c4d36e5d113085^{commit} # git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master # git rev-parse -q --verify 8b11ec1b5ffb54f71cb5a5e5c8c4d36e5d113085^{commit} 8b11ec1b5ffb54f71cb5a5e5c8c4d36e5d113085 # git checkout -q -f -B kisskb 8b11ec1b5ffb54f71cb5a5e5c8c4d36e5d113085 # git clean -qxdf # < git log -1 # commit 8b11ec1b5ffb54f71cb5a5e5c8c4d36e5d113085 # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Wed Aug 1 13:43:38 2018 -0700 # # mm: do not initialize TLB stack vma's with vma_init() # # Commit 2c4541e24c55 ("mm: use vma_init() to initialize VMAs on stack and # data segments") tried to initialize various left-over ad-hoc vma's # "properly", but actually made things worse for the temporary vma's used # for TLB flushing. # # vma_init() doesn't actually initialize all of the vma, just a few # fields, so doing something like # # - struct vm_area_struct vma = { .vm_mm = tlb->mm, }; # + struct vm_area_struct vma; # + # + vma_init(&vma, tlb->mm); # # was actually very bad: instead of having a nicely initialized vma with # every field but "vm_mm" zeroed, you'd have an entirely uninitialized vma # with only a couple of fields initialized. And they weren't even fields # that the code in question mostly cared about. # # The flush_tlb_range() function takes a "struct vma" rather than a # "struct mm_struct", because a few architectures actually care about what # kind of range it is - being able to only do an ITLB flush if it's a # range that doesn't have data accesses enabled, for example. And all the # normal users already have the vma for doing the range invalidation. # # But a few people want to call flush_tlb_range() with a range they just # made up, so they also end up using a made-up vma. x86 just has a # special "flush_tlb_mm_range()" function for this, but other # architectures (arm and ia64) do the "use fake vma" thing instead, and # thus got caught up in the vma_init() changes. # # At the same time, the TLB flushing code really doesn't care about most # other fields in the vma, so vma_init() is just unnecessary and # pointless. # # This fixes things by having an explicit "this is just an initializer for # the TLB flush" initializer macro, which is used by the arm/arm64/ia64 # people who mis-use this interface with just a dummy vma. # # Fixes: 2c4541e24c55 ("mm: use vma_init() to initialize VMAs on stack and data segments") # Cc: Dmitry Vyukov <dvyukov@google.com> # Cc: Oleg Nesterov <oleg@redhat.com> # Cc: Andrea Arcangeli <aarcange@redhat.com> # Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com> # Cc: Andrew Morton <akpm@linux-foundation.org> # Cc: John Stultz <john.stultz@linaro.org> # Cc: Hugh Dickins <hughd@google.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux-gcc --version # < git log --format=%s --max-count=1 8b11ec1b5ffb54f71cb5a5e5c8c4d36e5d113085 # < make -s -j 48 ARCH=i386 O=/kisskb/build/linus-rand_i386-randconfig_i386 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux- randconfig KCONFIG_SEED=0xE95BD007 # Added to kconfig CONFIG_STANDALONE=y # Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y # yes \n \| make -s -j 48 ARCH=i386 O=/kisskb/build/linus-rand_i386-randconfig_i386 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux- oldconfig yes: standard output: Broken pipe yes: write error # make -s -j 48 ARCH=i386 O=/kisskb/build/linus-rand_i386-randconfig_i386 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux- /kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl': /kisskb/src/kernel/printk/printk.c:183:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/x86/kernel/apic/io_apic.c: In function 'mp_map_pin_to_irq': /kisskb/src/arch/x86/kernel/apic/io_apic.c:1033:6: warning: 'irq' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/hda/hdac_regmap.c: In function 'hda_reg_write': /kisskb/src/sound/hda/hdac_regmap.c:282:16: warning: 'err' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/x86/kernel/e820.c: In function 'e820__setup_pci_gap': /kisskb/src/arch/x86/kernel/e820.c:653:2: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function '_regmap_raw_write': /kisskb/src/drivers/base/regmap/regmap.c:1819:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read': /kisskb/src/drivers/base/regmap/regmap.c:2497:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/arch/x86/kernel/hw_breakpoint.c: In function 'arch_validate_hwbkpt_settings': /kisskb/src/arch/x86/kernel/hw_breakpoint.c:361:20: warning: 'align' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/dma-buf/reservation.c: In function 'reservation_object_add_shared_replace': /kisskb/src/drivers/dma-buf/reservation.c:207:2: warning: 'k' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/dma-buf/reservation.c:210:7: warning: 'i' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/sound/soc/codecs/da7219-aad.c: In function 'da7219_aad_hptest_work': /kisskb/src/sound/soc/codecs/da7219-aad.c:318:17: warning: 'pll_ctrl' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/acpi/button.c:255:12: warning: 'acpi_button_state_seq_show' defined but not used [-Wunused-function] /kisskb/src/drivers/firmware/google/coreboot_table.c: In function 'coreboot_table_init': /kisskb/src/drivers/firmware/google/coreboot_table.c:102:9: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c: In function 'amdgpu_set_pp_od_clk_voltage': /kisskb/src/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c:532:5: warning: 'ret' may be used uninitialized in this function [-Wuninitialized] /kisskb/src/drivers/gpu/drm/bridge/cdns-dsi.c:1340:12: warning: 'cdns_dsi_resume' defined but not used [-Wunused-function] /kisskb/src/drivers/gpu/drm/bridge/cdns-dsi.c:1353:12: warning: 'cdns_dsi_suspend' defined but not used [-Wunused-function] /kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c: In function 'soc15_set_ip_blocks': /kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:532:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp] /kisskb/src/drivers/gpu/drm/amd/amdgpu/soc15.c:551:3: warning: #warning "Enable CONFIG_DRM_AMD_DC for display support on SOC15." [-Wcpp] WARNING: vmlinux.o(.text.unlikely+0x3bd4): Section mismatch in reference from the function percpu_setup_debug_store() to the function .init.text:cea_map_percpu_pages() The function percpu_setup_debug_store() references the function __init cea_map_percpu_pages(). This is often because percpu_setup_debug_store lacks a __init annotation or the annotation of cea_map_percpu_pages is wrong. FATAL: modpost: Section mismatches detected. Set CONFIG_SECTION_MISMATCH_WARN_ONLY=y to allow them. /kisskb/src/scripts/Makefile.modpost:98: recipe for target 'vmlinux.o' failed make[2]: * [vmlinux.o] Error 1 /kisskb/src/Makefile:1010: recipe for target 'vmlinux' failed make[1]: * [vmlinux] Error 2 Makefile:146: recipe for target 'sub-make' failed make: * [sub-make] Error 2 Command 'make -s -j 48 ARCH=i386 O=/kisskb/build/linus-rand_i386-randconfig_i386 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/i386-linux/bin/i386-linux- ' returned non-zero exit status 2 # rm -rf /kisskb/build/linus-rand_i386-randconfig_i386 # Build took: 0:05:38.337850

© Michael Ellerman 2006-2018.