# git rev-parse -q --verify 03800e0526ee25ed7c843ca1e57b69ac2a5af642^{commit}
# git fetch -q -n -f git://gitlab.ozlabs.ibm.com/linuxppc/linux.git fixes-test
# git rev-parse -q --verify 03800e0526ee25ed7c843ca1e57b69ac2a5af642^{commit}
03800e0526ee25ed7c843ca1e57b69ac2a5af642
# git checkout -q -f -B kisskb 03800e0526ee25ed7c843ca1e57b69ac2a5af642
# git clean -qxdf
# < git log -1
# commit 03800e0526ee25ed7c843ca1e57b69ac2a5af642
# Author: Andrea Arcangeli <aarcange@redhat.com>
# Date:   Tue Jun 25 10:17:27 2019 -0400
# 
#     powerpc: fix off by one in max_zone_pfn initialization for ZONE_DMA
#     
#     25078dc1f74be16b858e914f52cc8f4d03c2271a first introduced an off by
#     one error in the ZONE_DMA initialization of PPC_BOOK3E_64=y and since
#     9739ab7eda459f0669ec9807e0d9be5020bab88c the off by one applies to
#     PPC32=y too. This simply corrects the off by one and should resolve
#     crashes like below:
#     
#     [   65.179101] page 0x7fff outside node 0 zone DMA [ 0x0 - 0x7fff ]
#     
#     Unfortunately in various MM places "max" means a non inclusive end of
#     range. free_area_init_nodes max_zone_pfn parameter is one case and
#     MAX_ORDER is another one (unrelated) that comes by memory.
#     
#     Reported-by: Zorro Lang <zlang@redhat.com>
#     Fixes: 25078dc1f74b ("powerpc: use mm zones more sensibly")
#     Fixes: 9739ab7eda45 ("powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac")
#     Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
#     Reviewed-by: Christoph Hellwig <hch@lst.de>
#     Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
#     Link: https://lore.kernel.org/r/20190625141727.2883-1-aarcange@redhat.com
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 03800e0526ee25ed7c843ca1e57b69ac2a5af642
# < make -s -j 48 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  allnoconfig
# make -s -j 48 ARCH=x86_64 O=/kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.6 CROSS_COMPILE=/opt/cross/kisskb/gcc-4.6.3-nolibc/x86_64-linux/bin/x86_64-linux-  
/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:1037:6: warning: 'irq' 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/arch/x86/kernel/e820.c: In function 'e820__setup_pci_gap':
/kisskb/src/arch/x86/kernel/e820.c:664:16: warning: 'gapstart' may be used uninitialized in this function [-Wuninitialized]
Completed OK
# rm -rf /kisskb/build/powerpc-fixes_x86_64-allnoconfig_x86_64-gcc4.6
# Build took: 0:00:24.464150