# git rev-parse -q --verify d4bf905307a1c90a27714ff7a9fd29b0a2ceed98^{commit}
d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
already have revision, skipping fetch
# git checkout -q -f -B kisskb d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
# git clean -qxdf
# < git log -1
# commit d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
# Author: Christophe Leroy <christophe.leroy@c-s.fr>
# Date:   Fri Feb 7 17:20:57 2020 +0000
# 
#     powerpc: Fix CONFIG_TRACE_IRQFLAGS with CONFIG_VMAP_STACK
#     
#     When CONFIG_PROVE_LOCKING is selected together with (now default)
#     CONFIG_VMAP_STACK, kernel enter deadlock during boot.
#     
#     At the point of checking whether interrupts are enabled or not, the
#     value of MSR saved on stack is read using the physical address of the
#     stack. But at this point, when using VMAP stack the DATA MMU
#     translation has already been re-enabled, leading to deadlock.
#     
#     Don't use the physical address of the stack when
#     CONFIG_VMAP_STACK is set.
#     
#     Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
#     Reported-by: Guenter Roeck <linux@roeck-us.net>
#     Fixes: 028474876f47 ("powerpc/32: prepare for CONFIG_VMAP_STACK")
#     Tested-by: Guenter Roeck <linux@roeck-us.net>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/daeacdc0dec0416d1c587cc9f9e7191ad3068dc0.1581095957.git.christophe.leroy@c-s.fr
# < /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 d4bf905307a1c90a27714ff7a9fd29b0a2ceed98
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_ksi8560_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  85xx/ksi8560_defconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_ksi8560_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  
/kisskb/src/kernel/printk/printk.c: In function 'devkmsg_sysctl_set_loglvl':
/kisskb/src/kernel/printk/printk.c:204:16: 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:72:12: 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/fs/ext4/extents.c: In function 'ext4_convert_unwritten_io_end_vec':
/kisskb/src/fs/ext4/extents.c:5009:23: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/io_uring.c: In function '__io_sqe_files_update':
/kisskb/src/fs/io_uring.c:5713:13: warning: 'err' may be used uninitialized in this function [-Wuninitialized]
INFO: Uncompressed kernel (size 0x4a150c) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
INFO: Uncompressed kernel (size 0x490ee8) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x500000)
Image Name:   Linux-5.5.0-gd4bf905307a1
Created:      Sat Feb  8 23:53:41 2020
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2327252 Bytes = 2272.71 KiB = 2.22 MiB
Load Address: 00000000
Entry Point:  00000000
Image Name:   Linux-5.5.0-gd4bf905307a1
Created:      Sat Feb  8 23:53:42 2020
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    2357506 Bytes = 2302.25 KiB = 2.25 MiB
Load Address: 00500000
Entry Point:  005002e8
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_85xx_ksi8560_defconfig_powerpc-gcc4.6
# Build took: 0:00:38.534202