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authorIngo Molnar <mingo@kernel.org>2012-12-08 15:44:43 +0100
committerIngo Molnar <mingo@kernel.org>2012-12-08 15:44:43 +0100
commit38130ec08716ae2ece8060eca01607b58da7258c (patch)
tree71d0cd76ccfb2b960ddb6b820850269265389052 /arch/powerpc
parente783377e93d4043a11013ce6e9173db34998e653 (diff)
parent1b2852b152be5150fbef7b585388ec43cf6f4415 (diff)
downloadlinux-38130ec08716ae2ece8060eca01607b58da7258c.tar.bz2
Merge tag 'sched-cputime-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into sched/core
Pull more cputime cleanups from Frederic Weisbecker: * Get rid of underscores polluting the vtime namespace * Consolidate context switch and tick handling * Improve debuggability by detecting irq unsafe callers Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/powerpc')
-rw-r--r--arch/powerpc/include/asm/cputime.h2
-rw-r--r--arch/powerpc/kernel/time.c24
2 files changed, 12 insertions, 14 deletions
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h
index 487d46ff68a1..483733bd06d4 100644
--- a/arch/powerpc/include/asm/cputime.h
+++ b/arch/powerpc/include/asm/cputime.h
@@ -228,6 +228,8 @@ static inline cputime_t clock_t_to_cputime(const unsigned long clk)
#define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))
+static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
+
#endif /* __KERNEL__ */
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
#endif /* __POWERPC_CPUTIME_H */
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 0db456f30d45..b3b14352b05e 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -297,6 +297,8 @@ static u64 vtime_delta(struct task_struct *tsk,
u64 now, nowscaled, deltascaled;
u64 udelta, delta, user_scaled;
+ WARN_ON_ONCE(!irqs_disabled());
+
now = mftb();
nowscaled = read_spurr(now);
get_paca()->system_time += now - get_paca()->starttime;
@@ -336,7 +338,7 @@ static u64 vtime_delta(struct task_struct *tsk,
return delta;
}
-void __vtime_account_system(struct task_struct *tsk)
+void vtime_account_system(struct task_struct *tsk)
{
u64 delta, sys_scaled, stolen;
@@ -346,7 +348,7 @@ void __vtime_account_system(struct task_struct *tsk)
account_steal_time(stolen);
}
-void __vtime_account_idle(struct task_struct *tsk)
+void vtime_account_idle(struct task_struct *tsk)
{
u64 delta, sys_scaled, stolen;
@@ -355,15 +357,15 @@ void __vtime_account_idle(struct task_struct *tsk)
}
/*
- * Transfer the user and system times accumulated in the paca
- * by the exception entry and exit code to the generic process
- * user and system time records.
+ * Transfer the user time accumulated in the paca
+ * by the exception entry and exit code to the generic
+ * process user time records.
* Must be called with interrupts disabled.
- * Assumes that vtime_account() has been called recently
- * (i.e. since the last entry from usermode) so that
+ * Assumes that vtime_account_system/idle() has been called
+ * recently (i.e. since the last entry from usermode) so that
* get_paca()->user_time_scaled is up to date.
*/
-void account_process_tick(struct task_struct *tsk, int user_tick)
+void vtime_account_user(struct task_struct *tsk)
{
cputime_t utime, utimescaled;
@@ -375,12 +377,6 @@ void account_process_tick(struct task_struct *tsk, int user_tick)
account_user_time(tsk, utime, utimescaled);
}
-void vtime_task_switch(struct task_struct *prev)
-{
- vtime_account(prev);
- account_process_tick(prev, 0);
-}
-
#else /* ! CONFIG_VIRT_CPU_ACCOUNTING */
#define calc_cputime_factors()
#endif