linux-kernel - [PATCH pstore-next v2 1/4] pstore: Centralize init/exit routines

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Message-Id: <20181018185616.14768-2-keescook@chromium.org>
Date:   Thu, 18 Oct 2018 11:56:13 -0700
From:   Kees Cook <keescook@...omium.org>
To:     linux-kernel@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>,
        "Joel Fernandes (Google)" <joel@...lfernandes.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Dan Williams <dan.j.williams@...el.com>,
        Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Tony Luck <tony.luck@...el.com>
Subject: [PATCH pstore-next v2 1/4] pstore: Centralize init/exit routines

In preparation for having additional actions during init/exit, this moves
the init/exit into platform.c, centralizing the logic to make call outs
to the fs init/exit.

Signed-off-by: Kees Cook <keescook@...omium.org>
---
 fs/pstore/inode.c    | 11 ++---------
 fs/pstore/internal.h |  5 +++--
 fs/pstore/platform.c | 23 +++++++++++++++++++++++
 3 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index 5fcb845b9fec..8cf2218b46a7 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -482,12 +482,10 @@ static struct file_system_type pstore_fs_type = {
 	.kill_sb	= pstore_kill_sb,
 };
 
-static int __init init_pstore_fs(void)
+int __init pstore_init_fs(void)
 {
 	int err;
 
-	pstore_choose_compression();
-
 	/* Create a convenient mount point for people to access pstore */
 	err = sysfs_create_mount_point(fs_kobj, "pstore");
 	if (err)
@@ -500,14 +498,9 @@ static int __init init_pstore_fs(void)
 out:
 	return err;
 }
-module_init(init_pstore_fs)
 
-static void __exit exit_pstore_fs(void)
+void __exit pstore_exit_fs(void)
 {
 	unregister_filesystem(&pstore_fs_type);
 	sysfs_remove_mount_point(fs_kobj, "pstore");
 }
-module_exit(exit_pstore_fs)
-
-MODULE_AUTHOR("Tony Luck <tony.luck@...el.com>");
-MODULE_LICENSE("GPL");
diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h
index fb767e28aeb2..98bb4fa6e6a7 100644
--- a/fs/pstore/internal.h
+++ b/fs/pstore/internal.h
@@ -37,7 +37,8 @@ extern bool	pstore_is_mounted(void);
 extern void	pstore_record_init(struct pstore_record *record,
 				   struct pstore_info *psi);
 
-/* Called during module_init() */
-extern void __init pstore_choose_compression(void);
+/* Called during pstore init/exit. */
+int __init	pstore_init_fs(void);
+void __init	pstore_exit_fs(void);
 
 #endif
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 15e99d5a681d..d61e26812af6 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -780,8 +780,31 @@ void __init pstore_choose_compression(void)
 	}
 }
 
+static int __init pstore_init(void)
+{
+	int ret;
+
+	pstore_choose_compression();
+
+	ret = pstore_init_fs();
+	if (ret)
+		return ret;
+
+	return 0;
+}
+module_init(pstore_init)
+
+static void __exit pstore_exit(void)
+{
+	pstore_exit_fs();
+}
+module_exit(pstore_exit)
+
 module_param(compress, charp, 0444);
 MODULE_PARM_DESC(compress, "Pstore compression to use");
 
 module_param(backend, charp, 0444);
 MODULE_PARM_DESC(backend, "Pstore backend to use");
+
+MODULE_AUTHOR("Tony Luck <tony.luck@...el.com>");
+MODULE_LICENSE("GPL");
-- 
2.17.1