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New: Outdated limitation for powerpc in vdso(7)

Bug 213419 [email protected] 1 participant 2 messages Jun 12, 2021 – Jul 3, 2021 Man-pages: manual pages for Linux -- Sections 2, 3, 4, 5, and 7

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https://bugzilla.kernel.org/show_bug.cgi?id=213419

Bug ID: 213419
Summary: Outdated limitation for powerpc in vdso(7)
Product: Documentation
Version: unspecified
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P1
Component: man-pages
Assignee: [email protected]
Reporter: [email protected]
Regression: No

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")

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#1 lore raw

[Bug 213419] Outdated limitation for powerpc in vdso(7)

https://bugzilla.kernel.org/show_bug.cgi?id=213419

Alejandro Colomar (man-pages) ([email protected]) changed:

What |Removed |Added
----------------------------------------------------------------------------

             Status|NEW                         |RESOLVED
                 CC|                            |[email protected]
         Resolution|---                         |DOCUMENTED

--- Comment #1 from Alejandro Colomar (man-pages) ([email protected]) --- Hi Christophe,

Thanks for the report.
I applied the following patch.

Thanks,

Alex

---

Author: Alejandro Colomar <[email protected]>
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vdso.7: Remove outdated limitation for powerpc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 <[email protected]>
Signed-off-by Alejandro Colomar <[email protected]>
man7/vdso.7 +0 -26
index ef6bef5bd..1d527c38e 100644
@@ -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.
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