# git rev-parse -q --verify 2f050d49e589cc23e2aa40628d9154e9569aee43^{commit}
2f050d49e589cc23e2aa40628d9154e9569aee43
already have revision, skipping fetch
# git checkout -q -f -B kisskb 2f050d49e589cc23e2aa40628d9154e9569aee43
# git clean -qxdf
# < git log -1
# commit 2f050d49e589cc23e2aa40628d9154e9569aee43
# Author: Nathan Chancellor <natechancellor@gmail.com>
# Date:   Sun Aug 11 19:32:15 2019 -0700
# 
#     powerpc: Avoid clang warnings around setjmp and longjmp
#     
#     Commit aea447141c7e ("powerpc: Disable -Wbuiltin-requires-header when
#     setjmp is used") disabled -Wbuiltin-requires-header because of a
#     warning about the setjmp and longjmp declarations.
#     
#     r367387 in clang added another diagnostic around this, complaining
#     that there is no jmp_buf declaration.
#     
#       In file included from ../arch/powerpc/xmon/xmon.c:47:
#       ../arch/powerpc/include/asm/setjmp.h:10:13: error: declaration of
#       built-in function 'setjmp' requires the declaration of the 'jmp_buf'
#       type, commonly provided in the header <setjmp.h>.
#       [-Werror,-Wincomplete-setjmp-declaration]
#       extern long setjmp(long *);
#                   ^
#       ../arch/powerpc/include/asm/setjmp.h:11:13: error: declaration of
#       built-in function 'longjmp' requires the declaration of the 'jmp_buf'
#       type, commonly provided in the header <setjmp.h>.
#       [-Werror,-Wincomplete-setjmp-declaration]
#       extern void longjmp(long *, long);
#                   ^
#       2 errors generated.
#     
#     Take the same approach as the above commit by disabling the warning
#     for the same reason, we provide our own longjmp/setjmp function.
#     
#     Cc: stable@vger.kernel.org # 4.19+
#     Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
#     Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20190812023214.107817-1-natechancellor@gmail.com
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-ld --version
# < git log --format=%s --max-count=1 2f050d49e589cc23e2aa40628d9154e9569aee43
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_akebono_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  44x/akebono_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_44x_akebono_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2591:6: warning: 'ret' 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:1852:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:194:16: 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:338:21: note: 'pdeo' was declared here
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:140:32: warning: 'levelspread[<U6a00>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[<U6a00>]' was declared here
/kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:248:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c:228:19: note: 'i' was declared here
/kisskb/src/drivers/usb/core/devio.c: In function 'async_completed':
/kisskb/src/drivers/usb/core/devio.c:613:23: warning: 'errno' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/arch/powerpc/boot/dts/akebono.dts:251.28-289.5: Warning (pci_bridge): /plb/pciex@10100000000: node name is not "pci" or "pcie"
/kisskb/src/arch/powerpc/boot/dts/akebono.dts:291.28-329.5: Warning (pci_bridge): /plb/pciex@20100000000: node name is not "pci" or "pcie"
/kisskb/src/arch/powerpc/boot/dts/akebono.dts:331.28-369.5: Warning (pci_bridge): /plb/pciex@18100000000: node name is not "pci" or "pcie"
/kisskb/src/arch/powerpc/boot/dts/akebono.dts:371.28-409.5: Warning (pci_bridge): /plb/pciex@28100000000: node name is not "pci" or "pcie"
arch/powerpc/boot/dts/akebono.dtb: Warning (pci_device_bus_num): Failed prerequisite 'pci_bridge'
Completed OK
# rm -rf /kisskb/build/powerpc-next_44x_akebono_defconfig_powerpc-gcc4.6
# Build took: 0:00:48.868104