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authorFrederic Weisbecker <fweisbec@gmail.com>2012-11-14 00:24:25 +0100
committerFrederic Weisbecker <fweisbec@gmail.com>2012-11-19 16:41:32 +0100
commite3942ba04052364d3c6454103362cafd87456010 (patch)
tree31e5cd4013fd140cb3e50ad6147382798bc88631 /arch/ia64
parentbcebdf846522056a84ba0b0cba5f5413868c9394 (diff)
vtime: Consolidate a bit the ctx switch code
On ia64 and powerpc, vtime context switch only consists in flushing system and user pending time, plus a few arch housekeeping. Consolidate that into a generic implementation. s390 is a special case because pending user and system time accounting there is hard to dissociate. So it's keeping its own implementation. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/ia64')
-rw-r--r--arch/ia64/include/asm/cputime.h2
-rw-r--r--arch/ia64/kernel/time.c9
2 files changed, 3 insertions, 8 deletions
diff --git a/arch/ia64/include/asm/cputime.h b/arch/ia64/include/asm/cputime.h
index 3deac956d325..7fcf7f08ab06 100644
--- a/arch/ia64/include/asm/cputime.h
+++ b/arch/ia64/include/asm/cputime.h
@@ -103,5 +103,7 @@ static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
#define cputime64_to_clock_t(__ct) \
cputime_to_clock_t((__force cputime_t)__ct)
+extern void arch_vtime_task_switch(struct task_struct *tsk);
+
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
#endif /* __IA64_CPUTIME_H */
diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 834c78bd3b5f..c9a7d2ebe089 100644
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -100,18 +100,11 @@ void vtime_account_user(struct task_struct *tsk)
* accumulated times to the current process, and to prepare accounting on
* the next process.
*/
-void vtime_task_switch(struct task_struct *prev)
+void arch_vtime_task_switch(struct task_struct *prev)
{
struct thread_info *pi = task_thread_info(prev);
struct thread_info *ni = task_thread_info(current);
- if (idle_task(smp_processor_id()) != prev)
- vtime_account_system(prev);
- else
- vtime_account_idle(prev);
-
- vtime_account_user(prev);
-
pi->ac_stamp = ni->ac_stamp;
ni->ac_stime = ni->ac_utime = 0;
}