netdev - [PATCH v3 07/49] binder: dynamically allocate the android-binder shrinker

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230727080502.77895-8-zhengqi.arch@bytedance.com>
Date: Thu, 27 Jul 2023 16:04:20 +0800
From: Qi Zheng <zhengqi.arch@...edance.com>
To: akpm@...ux-foundation.org,
	david@...morbit.com,
	tkhai@...ru,
	vbabka@...e.cz,
	roman.gushchin@...ux.dev,
	djwong@...nel.org,
	brauner@...nel.org,
	paulmck@...nel.org,
	tytso@....edu,
	steven.price@....com,
	cel@...nel.org,
	senozhatsky@...omium.org,
	yujie.liu@...el.com,
	gregkh@...uxfoundation.org,
	muchun.song@...ux.dev
Cc: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	x86@...nel.org,
	kvm@...r.kernel.org,
	xen-devel@...ts.xenproject.org,
	linux-erofs@...ts.ozlabs.org,
	linux-f2fs-devel@...ts.sourceforge.net,
	cluster-devel@...hat.com,
	linux-nfs@...r.kernel.org,
	linux-mtd@...ts.infradead.org,
	rcu@...r.kernel.org,
	netdev@...r.kernel.org,
	dri-devel@...ts.freedesktop.org,
	linux-arm-msm@...r.kernel.org,
	dm-devel@...hat.com,
	linux-raid@...r.kernel.org,
	linux-bcache@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	linux-fsdevel@...r.kernel.org,
	linux-ext4@...r.kernel.org,
	linux-xfs@...r.kernel.org,
	linux-btrfs@...r.kernel.org,
	Qi Zheng <zhengqi.arch@...edance.com>
Subject: [PATCH v3 07/49] binder: dynamically allocate the android-binder shrinker

Use new APIs to dynamically allocate the android-binder shrinker.

Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
---
 drivers/android/binder_alloc.c | 31 +++++++++++++++++++------------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff --git a/drivers/android/binder_alloc.c b/drivers/android/binder_alloc.c
index e3db8297095a..62675cedd38e 100644
--- a/drivers/android/binder_alloc.c
+++ b/drivers/android/binder_alloc.c
@@ -1053,11 +1053,7 @@ binder_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
 			    NULL, sc->nr_to_scan);
 }
 
-static struct shrinker binder_shrinker = {
-	.count_objects = binder_shrink_count,
-	.scan_objects = binder_shrink_scan,
-	.seeks = DEFAULT_SEEKS,
-};
+static struct shrinker *binder_shrinker;
 
 /**
  * binder_alloc_init() - called by binder_open() for per-proc initialization
@@ -1077,19 +1073,30 @@ void binder_alloc_init(struct binder_alloc *alloc)
 
 int binder_alloc_shrinker_init(void)
 {
-	int ret = list_lru_init(&binder_alloc_lru);
+	int ret;
 
-	if (ret == 0) {
-		ret = register_shrinker(&binder_shrinker, "android-binder");
-		if (ret)
-			list_lru_destroy(&binder_alloc_lru);
+	ret = list_lru_init(&binder_alloc_lru);
+	if (ret)
+		return ret;
+
+	binder_shrinker = shrinker_alloc(0, "android-binder");
+	if (!binder_shrinker) {
+		list_lru_destroy(&binder_alloc_lru);
+		return -ENOMEM;
 	}
-	return ret;
+
+	binder_shrinker->count_objects = binder_shrink_count;
+	binder_shrinker->scan_objects = binder_shrink_scan;
+	binder_shrinker->seeks = DEFAULT_SEEKS;
+
+	shrinker_register(binder_shrinker);
+
+	return 0;
 }
 
 void binder_alloc_shrinker_exit(void)
 {
-	unregister_shrinker(&binder_shrinker);
+	shrinker_free(binder_shrinker);
 	list_lru_destroy(&binder_alloc_lru);
 }
 
-- 
2.30.2