# git rev-parse -q --verify 498e47cd1d1f3e0a870a29d1b28093e64db52fd2^{commit}
498e47cd1d1f3e0a870a29d1b28093e64db52fd2
already have revision, skipping fetch
# git checkout -q -f -B kisskb 498e47cd1d1f3e0a870a29d1b28093e64db52fd2
# git clean -qxdf
# < git log -1
# commit 498e47cd1d1f3e0a870a29d1b28093e64db52fd2
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Mar 27 09:48:47 2024 -0700
# 
#     Fix build errors due to new UIO_MEM_DMA_COHERENT mess
#     
#     Commit 576882ef5e7f ("uio: introduce UIO_MEM_DMA_COHERENT type")
#     introduced a new use-case for 'struct uio_mem' where the 'mem' field now
#     contains a kernel virtual address when 'memtype' is set to
#     UIO_MEM_DMA_COHERENT.
#     
#     That in turn causes build errors, because 'mem' is of type
#     'phys_addr_t', and a virtual address is a pointer type.  When the code
#     just blindly uses cast to mix the two, it caused problems when
#     phys_addr_t isn't the same size as a pointer - notably on 32-bit
#     architectures with PHYS_ADDR_T_64BIT.
#     
#     The proper thing to do would probably be to use a union member, and not
#     have any casts, and make the 'mem' member be a union of 'mem.physaddr'
#     and 'mem.vaddr', based on 'memtype'.
#     
#     This is not that proper thing.  This is just fixing the ugly casts to be
#     even uglier, but at least not cause build errors on 32-bit platforms
#     with 64-bit physical addresses.
#     
#     Reported-by: Guenter Roeck <linux@roeck-us.net>
#     Fixes: 576882ef5e7f ("uio: introduce UIO_MEM_DMA_COHERENT type")
#     Fixes: 7722151e4651 ("uio_pruss: UIO_MEM_DMA_COHERENT conversion")
#     Fixes: 019947805a8d ("uio_dmem_genirq: UIO_MEM_DMA_COHERENT conversion")
#     Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
#     Cc: Chris Leech <cleech@redhat.com>
#     Cc: Nilesh Javali <njavali@marvell.com>
#     Cc: Christoph Hellwig <hch@lst.de>
#     Signed-off-by: Linus Torvalds <torvalds@linuxfoundation.org>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 498e47cd1d1f3e0a870a29d1b28093e64db52fd2
# make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  skiroot_defconfig
# < make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 160 ARCH=powerpc O=/kisskb/build/linus_skiroot_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
/kisskb/src/fs/btrfs/extent_io.c: In function 'extent_fiemap':
/kisskb/src/fs/btrfs/extent_io.c:3262:19: warning: 'last_extent_end' may be used uninitialized in this function [-Wmaybe-uninitialized]
  if (cache.cached && cache.offset + cache.len >= last_extent_end) {
                   ^
/kisskb/src/fs/btrfs/extent_io.c: At top level:
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-shift-negative-value'
cc1: warning: unrecognized command line option '-Wno-stringop-overflow'
Completed OK
# rm -rf /kisskb/build/linus_skiroot_defconfig_powerpc-gcc5
# Build took: 0:01:46.414273