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From: Ming Lei <ming.lei@redhat.com>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
	Christoph Hellwig <hch@lst.de>,
	Dan Schatzberg <schatzberg.dan@gmail.com>,
	Ming Lei <ming.lei@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH V3 1/7] mm: memcontrol: add helper of memcg_get_e_css
Date: Fri,  6 Aug 2021 10:34:17 +0800	[thread overview]
Message-ID: <20210806023423.131060-2-ming.lei@redhat.com> (raw)
In-Reply-To: <20210806023423.131060-1-ming.lei@redhat.com>

And helper of memcg_get_e_css() so that the consumer needn't to
call cgroup_get_e_css(cgroup, &memory_cgrp_subsys) directly, since
&memory_cgrp_subsys has to be used in case that MEMCG is enabled.

Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
---
 include/linux/memcontrol.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h
index bfe5c486f4ad..67c35793fdce 100644
--- a/include/linux/memcontrol.h
+++ b/include/linux/memcontrol.h
@@ -1101,6 +1101,10 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
 						gfp_t gfp_mask,
 						unsigned long *total_scanned);
 
+static inline struct cgroup_subsys_state *memcg_get_e_css(struct cgroup *cgrp)
+{
+	return cgroup_get_e_css(cgrp, &memory_cgrp_subsys);
+}
 #else /* CONFIG_MEMCG */
 
 #define MEM_CGROUP_ID_SHIFT	0
@@ -1456,6 +1460,10 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order,
 {
 	return 0;
 }
+static inline struct cgroup_subsys_state *memcg_get_e_css(struct cgroup *cgrp)
+{
+	return NULL;
+}
 #endif /* CONFIG_MEMCG */
 
 static inline void __inc_lruvec_kmem_state(void *p, enum node_stat_item idx)
-- 
2.31.1


  reply	other threads:[~2021-08-06  2:34 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-06  2:34 [PATCH V3 0/7] loop: cleanup charging io to mem/blkcg Ming Lei
2021-08-06  2:34 ` Ming Lei [this message]
2021-08-06  2:34 ` [PATCH V3 2/7] loop: clean up blkcg association Ming Lei
2021-08-06  5:50   ` kernel test robot
2021-08-06  2:34 ` [PATCH V3 3/7] loop: conver timer for monitoring idle worker into dwork Ming Lei
2021-08-06  2:34 ` [PATCH V3 4/7] loop: add __loop_free_idle_workers() for covering freeing workers in clearing FD Ming Lei
2021-08-06  2:34 ` [PATCH V3 5/7] loop: improve loop_process_work Ming Lei
2021-08-06  2:34 ` [PATCH V3 6/7] loop: use xarray to store workers Ming Lei
2021-08-06  2:34 ` [PATCH V3 7/7] loop: don't add worker into idle list Ming Lei

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