[patch 072/163] mm: memcg/slab: move memcg_kmem_bypass() to memcontrol.h

Andrew Morton
2020-08-07T06:21:10Z

From: Roman Gushchin <guro@fb.com>
Subject: mm: memcg/slab: move memcg_kmem_bypass() to memcontrol.h

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.

Link: http://lkml.kernel.org/r/20200623174037.3951353-12-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

include/linux/memcontrol.h | 12 ++++++++++++
mm/memcontrol.c | 12 ------------
2 files changed, 12 insertions(+), 12 deletions(-)

--- a/include/linux/memcontrol.h~mm-memcg-slab-move-memcg_kmem_bypass-to-memcontrolh
+++ a/include/linux/memcontrol.h
@@ -1440,6 +1440,18 @@ static inline bool memcg_kmem_enabled(vo
return static_branch_unlikely(&memcg_kmem_enabled_key);
}

+static inline bool memcg_kmem_bypass(void)
+{
+ if (in_interrupt())
+ return true;
+
+ /* Allow remote memcg charging in kthread contexts. */
+ if ((!current->mm || (current->flags & PF_KTHREAD)) &&
+ !current->active_memcg)
+ return true;
+ return false;
+}
+
static inline int memcg_kmem_charge_page(struct page *page, gfp_t gfp,
int order)
{
--- a/mm/memcontrol.c~mm-memcg-slab-move-memcg_kmem_bypass-to-memcontrolh
+++ a/mm/memcontrol.c
@@ -2945,18 +2945,6 @@ static void memcg_schedule_kmem_cache_cr
queue_work(memcg_kmem_cache_wq, &cw->work);
}

-static inline bool memcg_kmem_bypass(void)
-{
- if (in_interrupt())
- return true;
-
- /* Allow remote memcg charging in kthread contexts. */
- if ((!current->mm || (current->flags & PF_KTHREAD)) &&
- !current->active_memcg)
- return true;
- return false;
-}
-
/**
* memcg_kmem_get_cache: select the correct per-memcg cache for allocation
* @cachep: the original global kmem cache
_