# git rev-parse -q --verify 6e693b3ffecb0b478c7050b44a4842854154f715^{commit}
6e693b3ffecb0b478c7050b44a4842854154f715
already have revision, skipping fetch
# git checkout -q -f -B kisskb 6e693b3ffecb0b478c7050b44a4842854154f715
# git clean -qxdf
# < git log -1
# commit 6e693b3ffecb0b478c7050b44a4842854154f715
# Author: Will Deacon <will.deacon@arm.com>
# Date:   Sat Jan 19 21:56:05 2019 +0000
# 
#     x86: uaccess: Inhibit speculation past access_ok() in user_access_begin()
#     
#     Commit 594cc251fdd0 ("make 'user_access_begin()' do 'access_ok()'")
#     makes the access_ok() check part of the user_access_begin() preceding a
#     series of 'unsafe' accesses.  This has the desirable effect of ensuring
#     that all 'unsafe' accesses have been range-checked, without having to
#     pick through all of the callsites to verify whether the appropriate
#     checking has been made.
#     
#     However, the consolidated range check does not inhibit speculation, so
#     it is still up to the caller to ensure that they are not susceptible to
#     any speculative side-channel attacks for user addresses that ultimately
#     fail the access_ok() check.
#     
#     This is an oversight, so use __uaccess_begin_nospec() to ensure that
#     speculation is inhibited until the access_ok() check has passed.
#     
#     Reported-by: Julien Thierry <julien.thierry@arm.com>
#     Signed-off-by: Will Deacon <will.deacon@arm.com>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 6e693b3ffecb0b478c7050b44a4842854154f715
# < make -s -j 120 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  allmodconfig
# make -s -j 120 ARCH=arm64 O=/kisskb/build/linus_arm64-allmodconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
/kisskb/src/arch/arm64/boot/dts/rockchip/rk3399-sapphire-excavator.dts:94.9-98.5: Warning (graph_port): /edp-panel/ports: graph port node name should be 'port'
/kisskb/src/arch/arm64/boot/dts/rockchip/rk3399-gru-kevin.dts:46.9-50.5: Warning (graph_port): /edp-panel/ports: graph port node name should be 'port'
/kisskb/src/arch/arm64/boot/dts/rockchip/rk3399-gru-bob.dts:25.9-29.5: Warning (graph_port): /edp-panel/ports: graph port node name should be 'port'
In file included from /kisskb/src/include/asm-generic/bug.h:18,
                 from /kisskb/src/arch/arm64/include/asm/bug.h:37,
                 from /kisskb/src/include/linux/bug.h:5,
                 from /kisskb/src/include/linux/mmdebug.h:5,
                 from /kisskb/src/include/linux/mm.h:9,
                 from /kisskb/src/drivers/dma/imx-dma.c:14:
/kisskb/src/drivers/dma/imx-dma.c: In function 'imxdma_sg_next':
/kisskb/src/include/linux/kernel.h:846:29: warning: comparison of distinct pointer types lacks a cast
   (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                             ^~
/kisskb/src/include/linux/kernel.h:860:4: note: in expansion of macro '__typecheck'
   (__typecheck(x, y) && __no_side_effects(x, y))
    ^~~~~~~~~~~
/kisskb/src/include/linux/kernel.h:870:24: note: in expansion of macro '__safe_cmp'
  __builtin_choose_expr(__safe_cmp(x, y), \
                        ^~~~~~~~~~
/kisskb/src/include/linux/kernel.h:879:19: note: in expansion of macro '__careful_cmp'
 #define min(x, y) __careful_cmp(x, y, <)
                   ^~~~~~~~~~~~~
/kisskb/src/drivers/dma/imx-dma.c:288:8: note: in expansion of macro 'min'
  now = min(d->len, sg_dma_len(sg));
        ^~~
/kisskb/src/drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_crat.c:866:5: warning: "CONFIG_X86_64" is not defined, evaluates to 0 [-Wundef]
 #if CONFIG_X86_64
     ^~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/linus_arm64-allmodconfig_arm64-gcc8
# Build took: 0:11:30.928636