| From | Sasha Levin <> | Subject | [PATCH AUTOSEL 5.6 038/606] powerpc/vdso32: Fallback on getres syscall when clock is unknown | Date | Mon, 8 Jun 2020 19:02:43 -0400 |
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From: Christophe Leroy <christophe.leroy@csgroup.eu>
commit e963b7a28b2bf2416304e1a15df967fcf662aff5 upstream.
There are other clocks than the standard ones, for instance per process clocks. Therefore, being above the last standard clock doesn't mean it is a bad clock. So, fallback to syscall instead of returning -EINVAL inconditionaly.
Fixes: e33ffc956b08 ("powerpc/vdso32: implement clock_getres entirely") Cc: stable@vger.kernel.org # v5.6+ Reported-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Tested-by: Aurelien Jarno <aurelien@aurel32.net> Link: https://lore.kernel.org/r/7316a9e2c0c2517923eb4b0411c4a08d15e675a4.1589017281.git.christophe.leroy@csgroup.eu Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/powerpc/kernel/vdso32/gettimeofday.S | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S index a3951567118a..e7f8f9f1b3f4 100644 --- a/arch/powerpc/kernel/vdso32/gettimeofday.S +++ b/arch/powerpc/kernel/vdso32/gettimeofday.S @@ -218,11 +218,11 @@ V_FUNCTION_BEGIN(__kernel_clock_getres) blr /* - * invalid clock + * syscall fallback */ 99: - li r3, EINVAL - crset so + li r0,__NR_clock_getres + sc blr .cfi_endproc V_FUNCTION_END(__kernel_clock_getres) -- 2.25.1
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