linux-kernel - [PATCH 1/2] cputime: fix compiler warning caused by timeval_to

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Date:	Sat, 23 Feb 2013 17:28:44 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Li Zhong <zhong@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Kevin Hilman <khilman@...aro.org>
Subject: [PATCH 1/2] cputime: fix compiler warning caused by timeval_to_cputime()

From: Li Zhong <zhong@...ux.vnet.ibm.com>

Saw the following compiler warning on next tree:

kernel/itimer.c: In function 'set_cpu_itimer':
kernel/itimer.c:152:2: warning: passing argument 1 of
'timeval_to_cputime' discards 'const' qualifier from pointer target type
[enabled by default]
...

timeval_to_cputime() is always passed a constant timeval in
argument, we need to teach the nsecs based cputime implementation
about that.

Signed-off-by: Li Zhong <zhong@...ux.vnet.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Kevin Hilman <khilman@...aro.org>
---
 include/asm-generic/cputime_nsecs.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/include/asm-generic/cputime_nsecs.h b/include/asm-generic/cputime_nsecs.h
index b6485ca..a8ece9a 100644
--- a/include/asm-generic/cputime_nsecs.h
+++ b/include/asm-generic/cputime_nsecs.h
@@ -76,7 +76,7 @@ static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
 /*
  * Convert cputime <-> timeval (msec)
  */
-static inline cputime_t timeval_to_cputime(struct timeval *val)
+static inline cputime_t timeval_to_cputime(const struct timeval *val)
 {
 	u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC;
 	return (__force cputime_t) ret;
-- 
1.7.5.4

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