knfsd: cache unregistration needn't return error

There's really nothing much the caller can do if cache unregistration
fails.  And indeed, all any caller does in this case is print an error
and continue.  So just return void and move the printk's inside
cache_unregister.

Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

6 files changed, 14 insertions, 20 deletions

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 66d0aeb32a..d29b70a28f 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1670,10 +1670,8 @@ nfsd_export_shutdown(void)
 
         exp_writelock();
 
-        if (cache_unregister(&svc_expkey_cache))
-                printk(KERN_ERR "nfsd: failed to unregister expkey cache\n");
-        if (cache_unregister(&svc_export_cache))
-                printk(KERN_ERR "nfsd: failed to unregister export cache\n");
+        cache_unregister(&svc_expkey_cache);
+        cache_unregister(&svc_export_cache);
         svcauth_unix_purge();
 
         exp_writeunlock();
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index 5b56c77c15..ef22179c49 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -474,10 +474,8 @@ nfsd_idmap_init(void)
 void
 nfsd_idmap_shutdown(void)
 {
-        if (cache_unregister(&idtoname_cache))
-                printk(KERN_ERR "nfsd: failed to unregister idtoname cache\n");
-        if (cache_unregister(&nametoid_cache))
-                printk(KERN_ERR "nfsd: failed to unregister nametoid cache\n");
+        cache_unregister(&idtoname_cache);
+        cache_unregister(&nametoid_cache);
 }
 
 /*
diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index bd7a6b0a87..b683b5ddee 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -170,7 +170,7 @@ extern void cache_flush(void);
 extern void cache_purge(struct cache_detail *detail);
 #define NEVER (0x7FFFFFFF)
 extern void cache_register(struct cache_detail *cd);
-extern int cache_unregister(struct cache_detail *cd);
+extern void cache_unregister(struct cache_detail *cd);
 
 extern void qword_add(char **bpp, int *lp, char *str);
 extern void qword_addhex(char **bpp, int *lp, char *buf, int blen);
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 73940df6c4..d329a12500 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -1396,9 +1396,7 @@ gss_svc_init(void)
 void
 gss_svc_shutdown(void)
 {
-        if (cache_unregister(&rsc_cache))
-                printk(KERN_ERR "auth_rpcgss: failed to unregister rsc cache\n");
-        if (cache_unregister(&rsi_cache))
-                printk(KERN_ERR "auth_rpcgss: failed to unregister rsi cache\n");
+        cache_unregister(&rsc_cache);
+        cache_unregister(&rsi_cache);
         svc_auth_unregister(RPC_AUTH_GSS);
 }
diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 3b11277d27..365586a999 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -343,7 +343,7 @@ void cache_register(struct cache_detail *cd)
         schedule_delayed_work(&cache_cleaner, 0);
 }
 
-int cache_unregister(struct cache_detail *cd)
+void cache_unregister(struct cache_detail *cd)
 {
         cache_purge(cd);
         spin_lock(&cache_list_lock);
@@ -351,7 +351,7 @@ int cache_unregister(struct cache_detail *cd)
         if (cd->entries || atomic_read(&cd->inuse)) {
                 write_unlock(&cd->hash_lock);
                 spin_unlock(&cache_list_lock);
-                return -EBUSY;
+                goto out;
         }
         if (current_detail == cd)
                 current_detail = NULL;
@@ -373,7 +373,9 @@ int cache_unregister(struct cache_detail *cd)
                 /* module must be being unloaded so its safe to kill the worker */
                 cancel_delayed_work_sync(&cache_cleaner);
         }
-        return 0;
+        return;
+out:
+        printk(KERN_ERR "nfsd: failed to unregister %s cache\n", cd->name);
 }
 
 /* clean cache tries to find something to clean
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index 1a7e309d00..ef7dc78e2c 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -98,10 +98,8 @@ cleanup_sunrpc(void)
         cleanup_socket_xprt();
         unregister_rpc_pipefs();
         rpc_destroy_mempool();
-        if (cache_unregister(&ip_map_cache))
-                printk(KERN_ERR "sunrpc: failed to unregister ip_map cache\n");
-        if (cache_unregister(&unix_gid_cache))
-              printk(KERN_ERR "sunrpc: failed to unregister unix_gid cache\n");
+        cache_unregister(&ip_map_cache);
+        cache_unregister(&unix_gid_cache);
 #ifdef RPC_DEBUG
         rpc_unregister_sysctl();
 #endif