linux-kernel - [PATCH v4 21/48] sunrpc: dynamically allocate the sunrpc

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Message-Id: <20230807110936.21819-22-zhengqi.arch@bytedance.com>
Date:   Mon,  7 Aug 2023 19:09:09 +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, simon.horman@...igine.com,
        dlemoal@...nel.org
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>,
        Muchun Song <songmuchun@...edance.com>
Subject: [PATCH v4 21/48] sunrpc: dynamically allocate the sunrpc_cred shrinker

Use new APIs to dynamically allocate the sunrpc_cred shrinker.

Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
Reviewed-by: Muchun Song <songmuchun@...edance.com>
---
 net/sunrpc/auth.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/net/sunrpc/auth.c b/net/sunrpc/auth.c
index 2f16f9d17966..0cc52e39f859 100644
--- a/net/sunrpc/auth.c
+++ b/net/sunrpc/auth.c
@@ -861,11 +861,7 @@ rpcauth_uptodatecred(struct rpc_task *task)
 		test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0;
 }
 
-static struct shrinker rpc_cred_shrinker = {
-	.count_objects = rpcauth_cache_shrink_count,
-	.scan_objects = rpcauth_cache_shrink_scan,
-	.seeks = DEFAULT_SEEKS,
-};
+static struct shrinker *rpc_cred_shrinker;
 
 int __init rpcauth_init_module(void)
 {
@@ -874,9 +870,18 @@ int __init rpcauth_init_module(void)
 	err = rpc_init_authunix();
 	if (err < 0)
 		goto out1;
-	err = register_shrinker(&rpc_cred_shrinker, "sunrpc_cred");
-	if (err < 0)
+	rpc_cred_shrinker = shrinker_alloc(0, "sunrpc_cred");
+	if (!rpc_cred_shrinker) {
+		err = -ENOMEM;
 		goto out2;
+	}
+
+	rpc_cred_shrinker->count_objects = rpcauth_cache_shrink_count;
+	rpc_cred_shrinker->scan_objects = rpcauth_cache_shrink_scan;
+	rpc_cred_shrinker->seeks = DEFAULT_SEEKS;
+
+	shrinker_register(rpc_cred_shrinker);
+
 	return 0;
 out2:
 	rpc_destroy_authunix();
@@ -887,5 +892,5 @@ int __init rpcauth_init_module(void)
 void rpcauth_remove_module(void)
 {
 	rpc_destroy_authunix();
-	unregister_shrinker(&rpc_cred_shrinker);
+	shrinker_free(rpc_cred_shrinker);
 }
-- 
2.30.2