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Message-Id: <1392587568-7325-7-git-send-email-stefani@seibold.net>
Date: Sun, 16 Feb 2014 22:52:44 +0100
From: Stefani Seibold <stefani@...bold.net>
To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
x86@...nel.org, tglx@...utronix.de, mingo@...hat.com,
hpa@...or.com, ak@...ux.intel.com, aarcange@...hat.com,
john.stultz@...aro.org, luto@...capital.net, xemul@...allels.com,
gorcunov@...nvz.org, andriy.shevchenko@...ux.intel.com
Cc: Martin.Runge@...de-schwarz.com, Andreas.Brief@...de-schwarz.com,
Stefani Seibold <stefani@...bold.net>
Subject: [PATCH v18 06/10] cleanup __vdso_gettimeofday
This patch do a little cleanup for the __vdso_gettimeofday() function.
It kick out an unneeded ret local variable and makes the code faster if
only the timezone is needed.
Signed-off-by: Stefani Seibold <stefani@...bold.net>
---
arch/x86/vdso/vclock_gettime.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86/vdso/vclock_gettime.c b/arch/x86/vdso/vclock_gettime.c
index 743f277..09dae4a 100644
--- a/arch/x86/vdso/vclock_gettime.c
+++ b/arch/x86/vdso/vclock_gettime.c
@@ -259,13 +259,12 @@ int clock_gettime(clockid_t, struct timespec *)
notrace int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
{
- long ret = VCLOCK_NONE;
-
if (likely(tv != NULL)) {
BUILD_BUG_ON(offsetof(struct timeval, tv_usec) !=
offsetof(struct timespec, tv_nsec) ||
sizeof(*tv) != sizeof(struct timespec));
- ret = do_realtime((struct timespec *)tv);
+ if (unlikely(do_realtime((struct timespec *)tv) == VCLOCK_NONE))
+ return vdso_fallback_gtod(tv, tz);
tv->tv_usec /= 1000;
}
if (unlikely(tz != NULL)) {
@@ -274,8 +273,6 @@ notrace int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz)
tz->tz_dsttime = gtod->sys_tz.tz_dsttime;
}
- if (ret == VCLOCK_NONE)
- return vdso_fallback_gtod(tv, tz);
return 0;
}
int gettimeofday(struct timeval *, struct timezone *)
--
1.8.5.5
--
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