[tip:sched/core] sched/cputime: Export account_guest_time()

[tip-bot for Frederic Weisbecker <tipbot@zytor.com>]

Commit-ID:  1213699ab426608ff1925ab263dd6925102bb92a
Gitweb:     http://git.kernel.org/tip/1213699ab426608ff1925ab263dd6925102bb92a
Author:     Frederic Weisbecker <fweisbec@gmail.com>
AuthorDate: Thu, 5 Jan 2017 18:11:44 +0100
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Sat, 14 Jan 2017 09:54:11 +0100

sched/cputime: Export account_guest_time()

In order to prepare for CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y to delay
cputime accounting to the tick, let's allow archs to account cputime
directly to gtime.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1483636310-6557-5-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 include/linux/kernel_stat.h | 1 +
 kernel/sched/cputime.c      | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
index 14b63bb..cfd6c0c 100644
--- a/include/linux/kernel_stat.h
+++ b/include/linux/kernel_stat.h
@@ -79,6 +79,7 @@ static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
 }
 
 extern void account_user_time(struct task_struct *, cputime_t);
+extern void account_guest_time(struct task_struct *, cputime_t);
 extern void account_system_time(struct task_struct *, int, cputime_t);
 extern void account_system_index_time(struct task_struct *, cputime_t,
 				      enum cpu_usage_stat);
diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index aad4283..5813ee4 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -151,7 +151,7 @@ void account_user_time(struct task_struct *p, cputime_t cputime)
  * @p: the process that the cpu time gets accounted to
  * @cputime: the cpu time spent in virtual machine since the last update
  */
-static void account_guest_time(struct task_struct *p, cputime_t cputime)
+void account_guest_time(struct task_struct *p, cputime_t cputime)
 {
 	u64 *cpustat = kcpustat_this_cpu->cpustat;