[PATCH RFC 08/14] mm: memcg: move memcg_kmem_bypass() to memcontrol.h

[Roman Gushchin <guro@fb.com>]

To make the memcg_kmem_bypass() function available outside of
the memcontrol.c, let's move it to memcontrol.h. The function
is small and nicely fits into static inline sort of functions.

It will be used from the slab code.

Signed-off-by: Roman Gushchin <guro@fb.com>
---
 include/linux/memcontrol.h | 7 +++++++
 mm/memcontrol.c            | 7 -------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index b9643d758fc9..8f1d7161579f 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -1430,6 +1430,13 @@ static inline bool memcg_kmem_enabled(void)
 	return static_branch_unlikely(&memcg_kmem_enabled_key);
 }
 
+static inline bool memcg_kmem_bypass(void)
+{
+	if (in_interrupt() || !current->mm || (current->flags & PF_KTHREAD))
+		return true;
+	return false;
+}
+
 static inline int memcg_kmem_charge(struct page *page, gfp_t gfp, int order)
 {
 	if (memcg_kmem_enabled())
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 761b646eb968..d57f95177aec 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2992,13 +2992,6 @@ static void memcg_schedule_kmem_cache_create(struct mem_cgroup *memcg,
 	queue_work(memcg_kmem_cache_wq, &cw->work);
 }
 
-static inline bool memcg_kmem_bypass(void)
-{
-	if (in_interrupt() || !current->mm || (current->flags & PF_KTHREAD))
-		return true;
-	return false;
-}
-
 /**
  * memcg_kmem_get_cache: select the correct per-memcg cache for allocation
  * @cachep: the original global kmem cache
-- 
2.21.0