From:   "Eric W. Biederman" <ebiederm@xmission.com>
To:     linux-kernel@vger.kernel.org
Cc:     linux-arch@vger.kernel.org,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Alexey Gladkov <legion@kernel.org>,
        Kyle Huey <me@kylehuey.com>, Oleg Nesterov <oleg@redhat.com>,
        Kees Cook <keescook@chromium.org>,
        Al Viro <viro@ZenIV.linux.org.uk>,
        Heiko Carstens <hca@linux.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Alexander Gordeev <agordeev@linux.ibm.com>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        "Eric W. Biederman" <ebiederm@xmission.com>
Date:   Wed,  8 Dec 2021 14:25:29 -0600
Message-Id: <20211208202532.16409-7-ebiederm@xmission.com>
In-Reply-To: <87a6ha4zsd.fsf@email.froward.int.ebiederm.org>
References: <87a6ha4zsd.fsf@email.froward.int.ebiederm.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Subject: [PATCH 07/10] exit: Rename module_put_and_exit to module_put_and_kthread_exit
Precedence: bulk

Update module_put_and_exit to call kthread_exit instead of do_exit.

Change the name to reflect this change in functionality.  All of the
users of module_put_and_exit are causing the current kthread to exit
so this change makes it clear what is happening.  There is no
functional change.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---
 crypto/algboss.c          | 4 ++--
 fs/cifs/connect.c         | 2 +-
 fs/nfs/callback.c         | 4 ++--
 fs/nfs/nfs4state.c        | 2 +-
 fs/nfsd/nfssvc.c          | 2 +-
 include/linux/module.h    | 6 +++---
 kernel/module.c           | 6 +++---
 net/bluetooth/bnep/core.c | 2 +-
 net/bluetooth/cmtp/core.c | 2 +-
 net/bluetooth/hidp/core.c | 2 +-
 tools/objtool/check.c     | 2 +-
 11 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/crypto/algboss.c b/crypto/algboss.c
index 1814d2c5188a..eb5fe84efb83 100644
--- a/crypto/algboss.c
+++ b/crypto/algboss.c
@@ -67,7 +67,7 @@ static int cryptomgr_probe(void *data)
 	complete_all(&param->larval->completion);
 	crypto_alg_put(&param->larval->alg);
 	kfree(param);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 }
 
 static int cryptomgr_schedule_probe(struct crypto_larval *larval)
@@ -190,7 +190,7 @@ static int cryptomgr_test(void *data)
 	crypto_alg_tested(param->driver, err);
 
 	kfree(param);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 }
 
 static int cryptomgr_schedule_test(struct crypto_alg *alg)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 82577a7a5bb1..39fbe9acbf51 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1139,7 +1139,7 @@ cifs_demultiplex_thread(void *p)
 	}
 
 	memalloc_noreclaim_restore(noreclaim_flag);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 }
 
 /*
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 86d856de1389..3c86a559a321 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -93,7 +93,7 @@ nfs4_callback_svc(void *vrqstp)
 		svc_process(rqstp);
 	}
 	svc_exit_thread(rqstp);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }
 
@@ -137,7 +137,7 @@ nfs41_callback_svc(void *vrqstp)
 		}
 	}
 	svc_exit_thread(rqstp);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }
 
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index ecc4594299d6..ea41af731978 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -2689,6 +2689,6 @@ static int nfs4_run_state_manager(void *ptr)
 	allow_signal(SIGKILL);
 	nfs4_state_manager(clp);
 	nfs_put_client(clp);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 80431921e5d7..5ce9f14318c4 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -986,7 +986,7 @@ nfsd(void *vrqstp)
 
 	/* Release module */
 	mutex_unlock(&nfsd_mutex);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }
 
diff --git a/include/linux/module.h b/include/linux/module.h
index c9f1200b2312..f03be97e9ec1 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -595,9 +595,9 @@ int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
 /* Look for this name: can be of form module:name. */
 unsigned long module_kallsyms_lookup_name(const char *name);
 
-extern void __noreturn __module_put_and_exit(struct module *mod,
+extern void __noreturn __module_put_and_kthread_exit(struct module *mod,
 			long code);
-#define module_put_and_exit(code) __module_put_and_exit(THIS_MODULE, code)
+#define module_put_and_kthread_exit(code) __module_put_and_kthread_exit(THIS_MODULE, code)
 
 #ifdef CONFIG_MODULE_UNLOAD
 int module_refcount(struct module *mod);
@@ -790,7 +790,7 @@ static inline int unregister_module_notifier(struct notifier_block *nb)
 	return 0;
 }
 
-#define module_put_and_exit(code) do_exit(code)
+#define module_put_and_kthread_exit(code) kthread_exit(code)
 
 static inline void print_modules(void)
 {
diff --git a/kernel/module.c b/kernel/module.c
index 84a9141a5e15..a3aa00bf270d 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -337,12 +337,12 @@ static inline void add_taint_module(struct module *mod, unsigned flag,
  * A thread that wants to hold a reference to a module only while it
  * is running can call this to safely exit.  nfsd and lockd use this.
  */
-void __noreturn __module_put_and_exit(struct module *mod, long code)
+void __noreturn __module_put_and_kthread_exit(struct module *mod, long code)
 {
 	module_put(mod);
-	do_exit(code);
+	kthread_exit(code);
 }
-EXPORT_SYMBOL(__module_put_and_exit);
+EXPORT_SYMBOL(__module_put_and_kthread_exit);
 
 /* Find a module section: 0 means not found. */
 static unsigned int find_sec(const struct load_info *info, const char *name)
diff --git a/net/bluetooth/bnep/core.c b/net/bluetooth/bnep/core.c
index c9add7753b9f..40baa6b7321a 100644
--- a/net/bluetooth/bnep/core.c
+++ b/net/bluetooth/bnep/core.c
@@ -535,7 +535,7 @@ static int bnep_session(void *arg)
 
 	up_write(&bnep_session_sem);
 	free_netdev(dev);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }
 
diff --git a/net/bluetooth/cmtp/core.c b/net/bluetooth/cmtp/core.c
index 0a2d78e811cf..9bfded6b74b3 100644
--- a/net/bluetooth/cmtp/core.c
+++ b/net/bluetooth/cmtp/core.c
@@ -323,7 +323,7 @@ static int cmtp_session(void *arg)
 	up_write(&cmtp_session_sem);
 
 	kfree(session);
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }
 
diff --git a/net/bluetooth/hidp/core.c b/net/bluetooth/hidp/core.c
index 80848dfc01db..5940744a8cd8 100644
--- a/net/bluetooth/hidp/core.c
+++ b/net/bluetooth/hidp/core.c
@@ -1305,7 +1305,7 @@ static int hidp_session_thread(void *arg)
 	l2cap_unregister_user(session->conn, &session->user);
 	hidp_session_put(session);
 
-	module_put_and_exit(0);
+	module_put_and_kthread_exit(0);
 	return 0;
 }
 
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 90108fe5610d..120e9598c11a 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -170,7 +170,7 @@ static bool __dead_end_function(struct objtool_file *file, struct symbol *func,
 		"do_task_dead",
 		"kthread_exit",
 		"make_task_dead",
-		"__module_put_and_exit",
+		"__module_put_and_kthread_exit",
 		"complete_and_exit",
 		"__reiserfs_panic",
 		"lbug_with_loc",
-- 
2.29.2