https://man7.org/linux/man-pages/man7/vdso.7.html (as of today, flagged 2021-03-22) ppc/32 and ppc/64 sections both have the following note: The CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE clocks are not supported by the __kernel_clock_getres and __kernel_clock_gettime interfaces; the kernel falls back to the real system call This note has been wrong from quite some time now, since commit 654abc69ef2e ("powerpc/vdso32: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE") and commit 5c929885f1bb ("powerpc/vdso64: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE")
Hi Christophe, Thanks for the report. I applied the following patch. Thanks, Alex --- Author: Alejandro Colomar <alx.manpages@gmail.com> Date: Sat Jul 3 18:43:16 2021 +0200 vdso.7: Remove outdated limitation for powerpc Christophe Leroy via Bugzilla: [ https://man7.org/linux/man-pages/man7/vdso.7.html (as of today, flagged 2021-03-22) ppc/32 and ppc/64 sections both have the following note: The CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE clocks are not supported by the __kernel_clock_getres and __kernel_clock_gettime interfaces; the kernel falls back to the real system call This note has been wrong from quite some time now, since commit 654abc69ef2e ("powerpc/vdso32: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE") and commit 5c929885f1bb ("powerpc/vdso64: Add support for CLOCK_{REALTIME/MONOTONIC}_COARSE") ] Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com> diff --git a/man7/vdso.7 b/man7/vdso.7 index ef6bef5bd..1d527c38e 100644 --- a/man7/vdso.7 +++ b/man7/vdso.7 @@ -385,19 +385,6 @@ __kernel_sync_dicache_p5 LINUX_2.6.15 .in .ft P \} -.PP -The -.B CLOCK_REALTIME_COARSE -and -.B CLOCK_MONOTONIC_COARSE -clocks are -.I not -supported by the -.I __kernel_clock_getres -and -.I __kernel_clock_gettime -interfaces; -the kernel falls back to the real system call. .SS ppc/64 functions .\" See linux/arch/powerpc/kernel/vdso64/vdso64.lds.S The table below lists the symbols exported by the vDSO. @@ -423,19 +410,6 @@ __kernel_sync_dicache_p5 LINUX_2.6.15 .in .ft P \} -.PP -The -.B CLOCK_REALTIME_COARSE -and -.B CLOCK_MONOTONIC_COARSE -clocks are -.I not -supported by the -.I __kernel_clock_getres -and -.I __kernel_clock_gettime -interfaces; -the kernel falls back to the real system call. .SS riscv functions .\" See linux/arch/riscv/kernel/vdso/vdso.lds.S The table below lists the symbols exported by the vDSO.