From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
schwab@linux-m68k.org
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v3] powerpc/vdso: fix clock_gettime_fallback for vdso32
Date: Tue, 12 Jan 2021 11:55:15 +0000 (UTC) [thread overview]
Message-ID: <0c0ab0eb3cc80687c326f76ff0dd5762b8812ecc.1610452505.git.christophe.leroy@csgroup.eu> (raw)
From: Andreas Schwab <schwab@linux-m68k.org>
The second argument of __kernel_clock_gettime64 points to a struct
__kernel_timespec, with 64-bit time_t, so use the clock_gettime64 syscall
in the fallback function for the 32-bit vdso. Similarily,
clock_getres_fallback should use the clock_getres_time64 syscall, though
it isn't yet called from the 32-bit vdso.
Signed-off-by: Andreas Schwab <schwab@linux-m68k.org>
[chleroy: Moved into a single #ifdef __powerpc64__ block]
Fixes: d0e3fc69d00d ("powerpc/vdso: Provide __kernel_clock_gettime64() on vdso32")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/include/asm/vdso/gettimeofday.h | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
index 7a215cc5da77..d453e725c79f 100644
--- a/arch/powerpc/include/asm/vdso/gettimeofday.h
+++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
@@ -102,6 +102,8 @@ int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz
return do_syscall_2(__NR_gettimeofday, (unsigned long)_tv, (unsigned long)_tz);
}
+#ifdef __powerpc64__
+
static __always_inline
int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
{
@@ -114,10 +116,22 @@ int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
}
-#ifdef CONFIG_VDSO32
+#else
#define BUILD_VDSO32 1
+static __always_inline
+int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ return do_syscall_2(__NR_clock_gettime64, _clkid, (unsigned long)_ts);
+}
+
+static __always_inline
+int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ return do_syscall_2(__NR_clock_getres_time64, _clkid, (unsigned long)_ts);
+}
+
static __always_inline
int clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
{
--
2.25.0
next reply other threads:[~2021-01-12 11:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-12 11:55 Christophe Leroy [this message]
2021-01-15 12:23 ` [PATCH v3] powerpc/vdso: fix clock_gettime_fallback for vdso32 Michael Ellerman
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