arm64 build failed on 5.4
make -sk KBUILD_BUILD_USER=TuxBuild -C/linux -j16 ARCH=arm64
CROSS_COMPILE=aarch64-linux-gnu- HOSTCC=gcc CC="sccache
aarch64-linux-gnu-gcc" O=build Image
#
../drivers/clocksource/arm_arch_timer.c:484:4: error: ‘const struct
arch_timer_erratum_workaround’ has no member named
‘disable_compat_vdso’
484 | .disable_compat_vdso = true,
| ^~~~~~~~~~~~~~~~~~~
../drivers/clocksource/arm_arch_timer.c:484:26: warning:
initialization of ‘u32 (*)(void)’ {aka ‘unsigned int (*)(void)’} from
‘int’ makes pointer from integer without a cast [-Wint-conversion]
484 | .disable_compat_vdso = true,
| ^~~~
../drivers/clocksource/arm_arch_timer.c:484:26: note: (near
initialization for ‘ool_workarounds[5].read_cntp_tval_el0’)
Could be this patch,
arm64: arch_timer: Disable the compat vdso for cores affected by
ARM64_WORKAROUND_1418040
commit 4b661d6133c5d3a7c9aca0b4ee5a78c7766eff3f upstream.
ARM64_WORKAROUND_1418040 requires that AArch32 EL0 accesses to
the virtual counter register are trapped and emulated by the kernel.
This makes the vdso pretty pointless, and in some cases livelock
prone.
Provide a workaround entry that limits the vdso to 64bit tasks.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20200706163802.1836732-4-maz@xxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
ref:
https://gitlab.com/Linaro/lkft/kernel-runs/-/jobs/638094006
--
Linaro LKFT
https://lkft.linaro.org
