Hello Michael, On 8/8/21 2:17 AM, Michael Kerrisk (man-pages) wrote: > Hello Alex, > > On 7/28/21 10:19 PM, Alejandro Colomar wrote: >> Christophe Leroy via Bugzilla: > > For the commit message, it would be good to have a URL for > the bug. (I could not find the bug.) That's right. <https://bugzilla.kernel.org/show_bug.cgi?id=213419> > >> [ >> 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@xxxxxxxxxx> >> Signed-off-by: Alejandro Colomar <alx.manpages@xxxxxxxxx> > > In cases such as this, I prefer not to drop the historical info. > See below. And also right. > >> --- >> man7/vdso.7 | 26 -------------------------- >> 1 file changed, 26 deletions(-) >> >> 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. > > I instead applied the patch below. > > Cheers, > > Michael > > > diff --git a/man7/vdso.7 b/man7/vdso.7 > index ef6bef5bd..39d6dc4ad 100644 > --- a/man7/vdso.7 > +++ b/man7/vdso.7 > @@ -386,7 +386,9 @@ __kernel_sync_dicache_p5 LINUX_2.6.15 > .ft P > \} > .PP > -The > +In kernel versions before Linux 5.6, > +.\" commit 654abc69ef2e69712e6d4e8a6cb9292b97a4aa39 > +the > .B CLOCK_REALTIME_COARSE > and > .B CLOCK_MONOTONIC_COARSE > @@ -424,7 +426,9 @@ __kernel_sync_dicache_p5 LINUX_2.6.15 > .ft P > \} > .PP > -The > +In kernel versions before Linux 4.16, > +.\" commit 5c929885f1bb4b77f85b1769c49405a0e0f154a1 > +the Much better! Thanks, Alex > .B CLOCK_REALTIME_COARSE > and > .B CLOCK_MONOTONIC_COARSE > > > -- Alejandro Colomar Linux man-pages comaintainer; https://www.kernel.org/doc/man-pages/ http://www.alejandro-colomar.es/
