# git rev-parse -q --verify ae02efbc3fcbabd9723c31c59db0cc4ce75ee22d^{commit}
ae02efbc3fcbabd9723c31c59db0cc4ce75ee22d
already have revision, skipping fetch
# git checkout -q -f -B kisskb ae02efbc3fcbabd9723c31c59db0cc4ce75ee22d
# git clean -qxdf
# < git log -1
# commit ae02efbc3fcbabd9723c31c59db0cc4ce75ee22d
# Author: Nicholas Piggin <npiggin@gmail.com>
# Date:   Thu May 2 15:21:07 2019 +1000
# 
#     powerpc/64: Don't trace code that runs with the soft irq mask unreconciled
#     
#     "Reconciling" in terms of interrupt handling, is to bring the soft irq
#     mask state in to synch with the hardware, after an interrupt causes
#     MSR[EE] to be cleared (while the soft mask may be enabled, and hard
#     irqs not marked disabled).
#     
#     General kernel code should not be called while unreconciled, because
#     local_irq_disable, etc. manipulations can cause surprising irq traces,
#     and it's fragile because the soft irq code does not really expect to
#     be called in this situation.
#     
#     When exiting from an interrupt, MSR[EE] is cleared to prevent races,
#     but soft irq state is enabled for the returned-to context, so this is
#     now an unreconciled state. restore_math is called in this state, and
#     that can be ftraced, and the ftrace subsystem disables local irqs.
#     
#     Mark restore_math and its callees as notrace. Restore a sanity check
#     in the soft irq code that had to be disabled for this case, by commit
#     4da1f79227ad4 ("powerpc/64: Disable irq restore warning for now").
#     
#     Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/alpha-linux/bin/alpha-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/alpha-linux/bin/alpha-linux-ld --version
# < git log --format=%s --max-count=1 ae02efbc3fcbabd9723c31c59db0cc4ce75ee22d
# < make -s -j 24 ARCH=alpha O=/kisskb/build/powerpc-next_alpha-defconfig_alpha CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/alpha-linux/bin/alpha-linux-  defconfig
# make -s -j 24 ARCH=alpha O=/kisskb/build/powerpc-next_alpha-defconfig_alpha CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/alpha-linux/bin/alpha-linux-  
<stdin>:1478:2: warning: #warning syscall pidfd_send_signal not implemented [-Wcpp]
<stdin>:1481:2: warning: #warning syscall io_uring_setup not implemented [-Wcpp]
<stdin>:1484:2: warning: #warning syscall io_uring_enter not implemented [-Wcpp]
<stdin>:1487:2: warning: #warning syscall io_uring_register not implemented [-Wcpp]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:187:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c: In function 'proc_reg_open':
/kisskb/src/include/linux/list.h:65:12: warning: 'pdeo' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/proc/inode.c:337:21: note: 'pdeo' was declared here
/kisskb/src/mm/mprotect.c: In function 'change_pte_range':
/kisskb/src/mm/mprotect.c:42:20: warning: unused variable 'mm' [-Wunused-variable]
/kisskb/src/net/ipv4/ip_output.c: In function '__ip_append_data':
/kisskb/src/include/linux/skbuff.h:1397:6: warning: 'extra_uref' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/net/ipv4/ip_output.c:885:14: note: 'extra_uref' was declared here
WARNING: "saved_config" [vmlinux] is COMMON symbol
  Kernel arch/alpha/boot/vmlinux.gz is ready
Completed OK
# rm -rf /kisskb/build/powerpc-next_alpha-defconfig_alpha
# Build took: 0:00:45.638677