# git rev-parse -q --verify bc1abb9e55cedaeac4602426f8fc83fb3a5b1c35^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify bc1abb9e55cedaeac4602426f8fc83fb3a5b1c35^{commit}
bc1abb9e55cedaeac4602426f8fc83fb3a5b1c35
# git checkout -q -f -B kisskb bc1abb9e55cedaeac4602426f8fc83fb3a5b1c35
# git clean -qxdf
# < git log -1
# commit bc1abb9e55cedaeac4602426f8fc83fb3a5b1c35
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Sep 19 10:49:42 2021 -0700
# 
#     dmascc: use proper 'virt_to_bus()' rather than casting to 'int'
#     
#     The old dmascc driver depends on the legacy ISA_DMA_API, and blindly
#     just casts the kernel virtual address to 'int' for set_dma_addr().
#     
#     That works only incidentally, and because the high bits of the address
#     will be ignored anyway. And on 64-bit architectures it causes warnings.
#     
#     Admittedly, 64-bit architectures with ISA are basically dead - I think
#     the only example of this is alpha, and nobody would ever use the dmascc
#     driver there.  But hey, the fix is easy enough, the end result is
#     cleaner, and it's yet another configuration that now builds without
#     warnings.
#     
#     If somebody actually uses this driver on an alpha and this fixes it for
#     you, please email me.  Because that is just incredibly bizarre.
#     
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 bc1abb9e55cedaeac4602426f8fc83fb3a5b1c35
# < make -s -j 120 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  allnoconfig
# < make -s -j 120 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  help
# make -s -j 120 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  olddefconfig
# make -s -j 120 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
In file included from /kisskb/src/arch/arm64/include/asm/io.h:185:0,
                 from /kisskb/src/include/linux/scatterlist.h:9,
                 from /kisskb/src/include/linux/dma-mapping.h:10,
                 from /kisskb/src/arch/arm64/kernel/asm-offsets.c:13:
/kisskb/src/include/asm-generic/io.h:1059:21: error: redefinition of 'pci_iounmap'
 #define pci_iounmap pci_iounmap
                     ^
/kisskb/src/include/asm-generic/io.h:1060:20: note: in expansion of macro 'pci_iounmap'
 static inline void pci_iounmap(struct pci_dev *dev, void __iomem *p)
                    ^
In file included from /kisskb/src/include/asm-generic/io.h:19:0,
                 from /kisskb/src/arch/arm64/include/asm/io.h:185,
                 from /kisskb/src/include/linux/scatterlist.h:9,
                 from /kisskb/src/include/linux/dma-mapping.h:10,
                 from /kisskb/src/arch/arm64/kernel/asm-offsets.c:13:
/kisskb/src/include/asm-generic/pci_iomap.h:54:20: note: previous definition of 'pci_iounmap' was here
 static inline void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
                    ^
make[2]: *** [/kisskb/src/scripts/Makefile.build:121: arch/arm64/kernel/asm-offsets.s] Error 1
make[1]: *** [/kisskb/src/Makefile:1219: prepare0] Error 2
make: *** [Makefile:219: __sub-make] Error 2
Command 'make -s -j 120 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4
# Build took: 0:00:19.228570