[PATCH 1/2] vdso.7: Remove outdated limitation for powerpc

[PATCH 1/2] vdso.7: Remove outdated limitation for powerpc

[Alejandro Colomar]

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>
---
 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.
-- 
2.32.0

[PATCH 2/2] vdso.7: Add y2038 compliant gettime for ppc/32

[Alejandro Colomar]

Christophe Leroy via Bugzilla:

[
https://man7.org/linux/man-pages/man7/vdso.7.html (2021-03-22)

In ppc32 functions section, the Y2038 compliant function
__kernel_clock_gettime64() is missing.

It was added by commit d0e3fc69d00d
("powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32")
]

.../linux$ git describe d0e3fc69d00d
v5.10-rc2-76-gd0e3fc69d00d

Reported-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Alejandro Colomar <alx.manpages@gmail.com>
---
 man7/vdso.7 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/man7/vdso.7 b/man7/vdso.7
index 1d527c38e..5fb22ab5e 100644
--- a/man7/vdso.7
+++ b/man7/vdso.7
@@ -371,6 +371,7 @@ symbol	version
 _
 __kernel_clock_getres	LINUX_2.6.15
 __kernel_clock_gettime	LINUX_2.6.15
+__kernel_clock_gettime64	LINUX_5.10
 __kernel_datapage_offset	LINUX_2.6.15
 __kernel_get_syscall_map	LINUX_2.6.15
 __kernel_get_tbfreq	LINUX_2.6.15
-- 
2.32.0