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Message-ID: <20140826153503.GD29286@htj.dyndns.org>
Date: Tue, 26 Aug 2014 11:35:03 -0400
From: Tejun Heo <tj@...nel.org>
To: linux-kernel@...r.kernel.org
Cc: cl@...ux-foundation.org, Kent Overstreet <koverstreet@...gle.com>,
Benjamin LaHaise <bcrl@...ck.org>,
Li Zefan <lizefan@...wei.com>,
"Nicholas A. Bellinger" <nab@...ux-iscsi.org>
Subject: [PATCH v2 3/3] percpu-refcount: add @gfp to percpu_ref_init()
>From ad5328cfb8c0d828e07ac428fdf3fbcb4f8698ad Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@...nel.org>
Date: Tue, 26 Aug 2014 11:33:17 -0400
Percpu allocator now supports allocation mask. Add @gfp to
percpu_ref_init() so that !GFP_KERNEL allocation masks can be used
with percpu_refs too.
This patch doesn't make any functional difference.
v2: blk-mq conversion was missing. Updated.
Signed-off-by: Tejun Heo <tj@...nel.org>
Cc: Kent Overstreet <koverstreet@...gle.com>
Cc: Benjamin LaHaise <bcrl@...ck.org>
Cc: Li Zefan <lizefan@...wei.com>
Cc: Nicholas A. Bellinger <nab@...ux-iscsi.org>
Cc: Jens Axboe <axboe@...nel.dk>
---
Missed blk-mq conversion while forward porting to v3.17-rc1. Updated.
Thanks.
block/blk-mq.c | 3 ++-
drivers/target/target_core_tpg.c | 3 ++-
fs/aio.c | 4 ++--
include/linux/percpu-refcount.h | 3 ++-
kernel/cgroup.c | 6 +++---
lib/percpu-refcount.c | 6 ++++--
6 files changed, 15 insertions(+), 10 deletions(-)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 5189cb1..702df07 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1776,7 +1776,8 @@ struct request_queue *blk_mq_init_queue(struct blk_mq_tag_set *set)
if (!q)
goto err_hctxs;
- if (percpu_ref_init(&q->mq_usage_counter, blk_mq_usage_counter_release))
+ if (percpu_ref_init(&q->mq_usage_counter, blk_mq_usage_counter_release,
+ GFP_KERNEL))
goto err_map;
setup_timer(&q->timeout, blk_mq_rq_timer, (unsigned long) q);
diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index fddfae6..4ab6da3 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -819,7 +819,8 @@ int core_tpg_add_lun(
{
int ret;
- ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release);
+ ret = percpu_ref_init(&lun->lun_ref, core_tpg_lun_ref_release,
+ GFP_KERNEL);
if (ret < 0)
return ret;
diff --git a/fs/aio.c b/fs/aio.c
index bd7ec2c..93fbcc0f 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -666,10 +666,10 @@ static struct kioctx *ioctx_alloc(unsigned nr_events)
INIT_LIST_HEAD(&ctx->active_reqs);
- if (percpu_ref_init(&ctx->users, free_ioctx_users))
+ if (percpu_ref_init(&ctx->users, free_ioctx_users, GFP_KERNEL))
goto err;
- if (percpu_ref_init(&ctx->reqs, free_ioctx_reqs))
+ if (percpu_ref_init(&ctx->reqs, free_ioctx_reqs, GFP_KERNEL))
goto err;
ctx->cpu = alloc_percpu(struct kioctx_cpu);
diff --git a/include/linux/percpu-refcount.h b/include/linux/percpu-refcount.h
index 3dfbf23..ee83251 100644
--- a/include/linux/percpu-refcount.h
+++ b/include/linux/percpu-refcount.h
@@ -49,6 +49,7 @@
#include <linux/kernel.h>
#include <linux/percpu.h>
#include <linux/rcupdate.h>
+#include <linux/gfp.h>
struct percpu_ref;
typedef void (percpu_ref_func_t)(struct percpu_ref *);
@@ -66,7 +67,7 @@ struct percpu_ref {
};
int __must_check percpu_ref_init(struct percpu_ref *ref,
- percpu_ref_func_t *release);
+ percpu_ref_func_t *release, gfp_t gfp);
void percpu_ref_reinit(struct percpu_ref *ref);
void percpu_ref_exit(struct percpu_ref *ref);
void percpu_ref_kill_and_confirm(struct percpu_ref *ref,
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 7dc8788..589b4d8 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1628,7 +1628,7 @@ static int cgroup_setup_root(struct cgroup_root *root, unsigned int ss_mask)
goto out;
root_cgrp->id = ret;
- ret = percpu_ref_init(&root_cgrp->self.refcnt, css_release);
+ ret = percpu_ref_init(&root_cgrp->self.refcnt, css_release, GFP_KERNEL);
if (ret)
goto out;
@@ -4487,7 +4487,7 @@ static int create_css(struct cgroup *cgrp, struct cgroup_subsys *ss,
init_and_link_css(css, ss, cgrp);
- err = percpu_ref_init(&css->refcnt, css_release);
+ err = percpu_ref_init(&css->refcnt, css_release, GFP_KERNEL);
if (err)
goto err_free_css;
@@ -4555,7 +4555,7 @@ static int cgroup_mkdir(struct kernfs_node *parent_kn, const char *name,
goto out_unlock;
}
- ret = percpu_ref_init(&cgrp->self.refcnt, css_release);
+ ret = percpu_ref_init(&cgrp->self.refcnt, css_release, GFP_KERNEL);
if (ret)
goto out_free_cgrp;
diff --git a/lib/percpu-refcount.c b/lib/percpu-refcount.c
index fe5a334..ff99032 100644
--- a/lib/percpu-refcount.c
+++ b/lib/percpu-refcount.c
@@ -40,6 +40,7 @@ static unsigned __percpu *pcpu_count_ptr(struct percpu_ref *ref)
* percpu_ref_init - initialize a percpu refcount
* @ref: percpu_ref to initialize
* @release: function which will be called when refcount hits 0
+ * @gfp: allocation mask to use
*
* Initializes the refcount in single atomic counter mode with a refcount of 1;
* analagous to atomic_set(ref, 1).
@@ -47,11 +48,12 @@ static unsigned __percpu *pcpu_count_ptr(struct percpu_ref *ref)
* Note that @release must not sleep - it may potentially be called from RCU
* callback context by percpu_ref_kill().
*/
-int percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release)
+int percpu_ref_init(struct percpu_ref *ref, percpu_ref_func_t *release,
+ gfp_t gfp)
{
atomic_set(&ref->count, 1 + PCPU_COUNT_BIAS);
- ref->pcpu_count_ptr = (unsigned long)alloc_percpu(unsigned);
+ ref->pcpu_count_ptr = (unsigned long)alloc_percpu_gfp(unsigned, gfp);
if (!ref->pcpu_count_ptr)
return -ENOMEM;
--
1.9.3
--
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