Buildresult: powerpc-fixes/x86_64-allnoconfig/x86_64-gcc4.6 built on Apr 25 2018, 21:10

kisskb

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Status:	OK
Date/Time:	Apr 25 2018, 21:10
Duration:	0:00:14.484316
Builder:	ka4
Revision:	powerpc: Fix smp_send_stop NMI IPI handling (`ac61c1156623455c46701654abd8c99720bceea1)`
Target:	powerpc-fixes/x86_64-allnoconfig/x86_64-gcc4.6
Branch:	powerpc-fixes
Compiler:	x86_64-gcc4.6 (x86_64-linux-gcc (GCC) 4.6.3)
Config:	allnoconfig (download)
Log:	Download original Possible warnings (3) 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] arch/x86/kernel/e820.c:650:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized] Full Log # git rev-parse -q --verify ac61c1156623455c46701654abd8c99720bceea1^{commit} # git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test # git rev-parse -q --verify ac61c1156623455c46701654abd8c99720bceea1^{commit} ac61c1156623455c46701654abd8c99720bceea1 # git checkout -q -f -B kisskb ac61c1156623455c46701654abd8c99720bceea1 # git clean -qxdf # < git log -1 # commit ac61c1156623455c46701654abd8c99720bceea1 # Author: Nicholas Piggin <npiggin@gmail.com> # Date: Wed Apr 25 12:17:53 2018 +1000 # # powerpc: Fix smp_send_stop NMI IPI handling # # The NMI IPI handler for a receiving CPU increments nmi_ipi_busy_count # over the handler function call, which causes later smp_send_nmi_ipi() # callers to spin until the call is finished. # # The stop_this_cpu() function never returns, so the busy count is never # decremeted, which can cause the system to hang in some cases. For # example panic() will call smp_send_stop() early on which calls # stop_this_cpu() on other CPUs, then later in the reboot path, # pnv_restart() will call smp_send_stop() again, which hangs. # # Fix this by adding a special case to the stop_this_cpu() handler to # decrement the busy count, because it will never return. # # Now that the NMI/non-NMI versions of stop_this_cpu() are different, # split them out into separate functions rather than doing #ifdef tricks # to share the body between the two functions. # # Fixes: 6bed3237624e3 ("powerpc: use NMI IPI for smp_send_stop") # Reported-by: Abdul Haleem <abdhalee@linux.vnet.ibm.com> # Signed-off-by: Nicholas Piggin <npiggin@gmail.com> # [mpe: Split out the functions, tweak change log a bit] # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version # < git log --format=%s --max-count=1 ac61c1156623455c46701654abd8c99720bceea1 # < make -s -j 40 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux- allnoconfig # make -s -j 40 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-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/arch/x86/kernel/e820.c: In function 'e820__setup_pci_gap': /kisskb/src/arch/x86/kernel/e820.c:650:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized] Completed OK # rm -rf /kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64 # Build took: 0:00:14.484316

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