# git rev-parse -q --verify 8b909e3548706cbebc0a676067b81aadda57f47e^{commit}
8b909e3548706cbebc0a676067b81aadda57f47e
already have revision, skipping fetch
# git checkout -q -f -B kisskb 8b909e3548706cbebc0a676067b81aadda57f47e
# git clean -qxdf
# < git log -1
# commit 8b909e3548706cbebc0a676067b81aadda57f47e
# Author: Thiago Jung Bauermann <bauerman@linux.ibm.com>
# Date:   Wed May 22 19:01:58 2019 -0300
# 
#     powerpc/kexec: Fix loading of kernel + initramfs with kexec_file_load()
#     
#     Commit b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
#     changed kexec_add_buffer() to skip searching for a memory location if
#     kexec_buf.mem is already set, and use the address that is there.
#     
#     In powerpc code we reuse a kexec_buf variable for loading both the
#     kernel and the initramfs by resetting some of the fields between those
#     uses, but not mem. This causes kexec_add_buffer() to try to load the
#     kernel at the same address where initramfs will be loaded, which is
#     naturally rejected:
#     
#       # kexec -s -l --initrd initramfs vmlinuz
#       kexec_file_load failed: Invalid argument
#     
#     Setting the mem field before every call to kexec_add_buffer() fixes
#     this regression.
#     
#     Fixes: b6664ba42f14 ("s390, kexec_file: drop arch_kexec_mem_walk()")
#     Cc: stable@vger.kernel.org # v5.0+
#     Signed-off-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
#     Reviewed-by: Dave Young <dyoung@redhat.com>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
# < /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 8b909e3548706cbebc0a676067b81aadda57f47e
# < make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_ge_imp3a_defconfig_powerpc-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/powerpc-linux/bin/powerpc-linux-  85xx/ge_imp3a_defconfig
# make -s -j 8 ARCH=powerpc O=/kisskb/build/powerpc-fixes_85xx_ge_imp3a_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:193:16: warning: 'old' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c: In function 'init_srcu_struct_fields':
/kisskb/src/kernel/rcu/srcutree.c:140:32: warning: 'levelspread[<U 6e0>]' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/kernel/rcu/srcutree.c:88:6: note: 'levelspread[<U 6e0>]' was declared here
/kisskb/src/drivers/base/regmap/regmap.c: In function 'regmap_raw_read':
/kisskb/src/drivers/base/regmap/regmap.c:2589:6: 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:1850:6: warning: 'ret' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/nfsd/nfs4xdr.c: In function 'nfsd4_encode_components_esc':
/kisskb/src/fs/nfsd/nfs4xdr.c:2077:9: warning: 'str' 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:331:21: note: 'pdeo' was declared here
/kisskb/src/drivers/net/tun.c: In function 'tun_get_user':
/kisskb/src/drivers/net/tun.c:1851:30: warning: 'copylen' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/net/tun.c:1764:46: warning: 'linear' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/fs/udf/unicode.c: In function 'udf_name_conv_char':
/kisskb/src/fs/udf/unicode.c:132:8: warning: 'c' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c: In function 'univ8250_release_irq':
/kisskb/src/drivers/tty/serial/8250/8250_core.c:247:18: warning: 'i' may be used uninitialized in this function [-Wuninitialized]
/kisskb/src/drivers/tty/serial/8250/8250_core.c:227:19: note: 'i' was declared here
INFO: Uncompressed kernel (size 0x84c250) overlaps the address of the wrapper(0x400000)
INFO: Fixing the link_address of wrapper to (0x900000)
Image Name:   Linux-5.2.0-rc1-g8b909e354870
Created:      Thu May 23 17:18:08 2019
Image Type:   PowerPC Linux Kernel Image (gzip compressed)
Data Size:    4259448 Bytes = 4159.62 KiB = 4.06 MiB
Load Address: 00000000
Entry Point:  00000000
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_85xx_ge_imp3a_defconfig_powerpc-gcc4.6
# Build took: 0:01:23.157876