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Date: Mon, 1 Jun 2015 20:07:02 +0800
From: Baolin Wang <baolin.wang@...aro.org>
To: benh@...nel.crashing.org
Cc: arnd@...db.de, paulus@...ba.org, mpe@...erman.id.au,
schwidefsky@...ibm.com, heiko.carstens@...ibm.com,
linux390@...ibm.com, rth@...ddle.net, riel@...hat.com,
cl@...ux.com, tj@...nel.org, fweisbec@...il.com,
linuxppc-dev@...ts.ozlabs.org, linux-s390@...r.kernel.org,
linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
baolin.wang@...aro.org, y2038@...ts.linaro.org
Subject: [PATCH v4 23/25] cputime:Introduce the cputime_to_timespec64/timespec64_to_cputime function
This patch introduces some functions for converting cputime to timespec64
and back, that repalce the timespec type with timespec64 type, as well as
for arch/s390 and arch/powerpc architecture.
And these new methods will replace the old cputime_to_timespec/timespec_to_cputime
function to ready for 2038 issue. The cputime_to_timespec/timespec_to_cputime
functions are moved to include/linux/cputime.h file for removing conveniently.
Signed-off-by: Baolin Wang <baolin.wang@...aro.org>
---
arch/powerpc/include/asm/cputime.h | 6 +++---
arch/s390/include/asm/cputime.h | 8 ++++----
include/asm-generic/cputime_jiffies.h | 10 +++++-----
include/asm-generic/cputime_nsecs.h | 4 ++--
include/linux/cputime.h | 16 ++++++++++++++++
5 files changed, 30 insertions(+), 14 deletions(-)
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h
index e245255..5dda5c0 100644
--- a/arch/powerpc/include/asm/cputime.h
+++ b/arch/powerpc/include/asm/cputime.h
@@ -154,9 +154,9 @@ static inline cputime_t secs_to_cputime(const unsigned long sec)
}
/*
- * Convert cputime <-> timespec
+ * Convert cputime <-> timespec64
*/
-static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
+static inline void cputime_to_timespec64(const cputime_t ct, struct timespec64 *p)
{
u64 x = (__force u64) ct;
unsigned int frac;
@@ -168,7 +168,7 @@ static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
p->tv_nsec = x;
}
-static inline cputime_t timespec_to_cputime(const struct timespec *p)
+static inline cputime_t timespec64_to_cputime(const struct timespec64 *p)
{
u64 ct;
diff --git a/arch/s390/include/asm/cputime.h b/arch/s390/include/asm/cputime.h
index b91e960..1266697 100644
--- a/arch/s390/include/asm/cputime.h
+++ b/arch/s390/include/asm/cputime.h
@@ -89,16 +89,16 @@ static inline cputime_t secs_to_cputime(const unsigned int s)
}
/*
- * Convert cputime to timespec and back.
+ * Convert cputime to timespec64 and back.
*/
-static inline cputime_t timespec_to_cputime(const struct timespec *value)
+static inline cputime_t timespec64_to_cputime(const struct timespec64 *value)
{
unsigned long long ret = value->tv_sec * CPUTIME_PER_SEC;
return (__force cputime_t)(ret + __div(value->tv_nsec * CPUTIME_PER_USEC, NSEC_PER_USEC));
}
-static inline void cputime_to_timespec(const cputime_t cputime,
- struct timespec *value)
+static inline void cputime_to_timespec64(const cputime_t cputime,
+ struct timespec64 *value)
{
unsigned long long __cputime = (__force unsigned long long) cputime;
#ifndef CONFIG_64BIT
diff --git a/include/asm-generic/cputime_jiffies.h b/include/asm-generic/cputime_jiffies.h
index fe386fc..54e034c 100644
--- a/include/asm-generic/cputime_jiffies.h
+++ b/include/asm-generic/cputime_jiffies.h
@@ -44,12 +44,12 @@ typedef u64 __nocast cputime64_t;
#define secs_to_cputime(sec) jiffies_to_cputime((sec) * HZ)
/*
- * Convert cputime to timespec and back.
+ * Convert cputime to timespec64 and back.
*/
-#define timespec_to_cputime(__val) \
- jiffies_to_cputime(timespec_to_jiffies(__val))
-#define cputime_to_timespec(__ct,__val) \
- jiffies_to_timespec(cputime_to_jiffies(__ct),__val)
+#define timespec64_to_cputime(__val) \
+ jiffies_to_cputime(timespec64_to_jiffies(__val))
+#define cputime_to_timespec64(__ct,__val) \
+ jiffies_to_timespec64(cputime_to_jiffies(__ct),__val)
/*
* Convert cputime to timeval and back.
diff --git a/include/asm-generic/cputime_nsecs.h b/include/asm-generic/cputime_nsecs.h
index 0419485..65c875b 100644
--- a/include/asm-generic/cputime_nsecs.h
+++ b/include/asm-generic/cputime_nsecs.h
@@ -73,12 +73,12 @@ typedef u64 __nocast cputime64_t;
/*
* Convert cputime <-> timespec (nsec)
*/
-static inline cputime_t timespec_to_cputime(const struct timespec *val)
+static inline cputime_t timespec64_to_cputime(const struct timespec64 *val)
{
u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
return (__force cputime_t) ret;
}
-static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
+static inline void cputime_to_timespec64(const cputime_t ct, struct timespec64 *val)
{
u32 rem;
diff --git a/include/linux/cputime.h b/include/linux/cputime.h
index f2eb2ee..e4c88da 100644
--- a/include/linux/cputime.h
+++ b/include/linux/cputime.h
@@ -13,4 +13,20 @@
usecs_to_cputime((__nsecs) / NSEC_PER_USEC)
#endif
+static inline cputime_t timespec_to_cputime(const struct timespec *ts)
+{
+ struct timespec64 ts64 = timespec_to_timespec64(*ts);
+
+ return timespec64_to_cputime(&ts64);
+}
+
+static inline void cputime_to_timespec(const cputime_t cputime,
+ struct timespec *value)
+{
+ struct timespec64 ts64;
+
+ cputime_to_timespec64(cputime, &ts64);
+ *value = timespec64_to_timespec(ts64);
+}
+
#endif /* __LINUX_CPUTIME_H */
--
1.7.9.5
--
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