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Date: Thu, 13 Nov 2014 21:37:37 +0800
From: Mahendran Ganesh <opensource.ganesh@...il.com>
To: minchan@...nel.org, ngupta@...are.org, ddstreet@...e.org,
sergey.senozhatsky@...il.com
Cc: linux-mm@...ck.org, linux-kernel@...r.kernel.org,
Mahendran Ganesh <opensource.ganesh@...il.com>
Subject: [PATCH 3/3] mm/zsmalloc: adjust zs_init/zs_exit location
In previous code design, the zs_exit() will be called by zs_init().
So function zs_exit() is located before zs_init(). And after patch [1],
the zs_exit() will not be called by zs_init().
So we can move the zs_exit() after zs_init() and put these two module
init/exit functions to the end of the file which is the common style.
[1] mm/zsmalloc: avoid unregister a NOT-registered zsmalloc zpool driver
Signed-off-by: Mahendran Ganesh <opensource.ganesh@...il.com>
---
mm/zsmalloc.c | 96 ++++++++++++++++++++++++++++-----------------------------
1 file changed, 48 insertions(+), 48 deletions(-)
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 92af030..4fcb7c9 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -881,54 +881,6 @@ static struct notifier_block zs_cpu_nb = {
.notifier_call = zs_cpu_notifier
};
-static void __exit zs_exit(void)
-{
- int cpu;
-
-#ifdef CONFIG_ZPOOL
- zpool_unregister_driver(&zs_zpool_driver);
-#endif
-
- cpu_notifier_register_begin();
-
- for_each_online_cpu(cpu)
- zs_cpu_notifier(NULL, CPU_DEAD, (void *)(long)cpu);
- __unregister_cpu_notifier(&zs_cpu_nb);
-
- cpu_notifier_register_done();
-}
-
-static int __init zs_init(void)
-{
- int cpu, ret;
-
- cpu_notifier_register_begin();
-
- __register_cpu_notifier(&zs_cpu_nb);
- for_each_online_cpu(cpu) {
- ret = zs_cpu_notifier(NULL, CPU_UP_PREPARE, (void *)(long)cpu);
- if (notifier_to_errno(ret))
- goto fail;
- }
-
- cpu_notifier_register_done();
-
-#ifdef CONFIG_ZPOOL
- zpool_register_driver(&zs_zpool_driver);
-#endif
-
- return 0;
-
-fail:
- for_each_online_cpu(cpu)
- zs_cpu_notifier(NULL, CPU_UP_CANCELED, (void *)(long)cpu);
- __unregister_cpu_notifier(&zs_cpu_nb);
-
- cpu_notifier_register_done();
-
- return notifier_to_errno(ret);
-}
-
/**
* zs_create_pool - Creates an allocation pool to work from.
* @flags: allocation flags used to allocate pool metadata
@@ -1187,6 +1139,54 @@ unsigned long zs_get_total_pages(struct zs_pool *pool)
}
EXPORT_SYMBOL_GPL(zs_get_total_pages);
+static int __init zs_init(void)
+{
+ int cpu, ret;
+
+ cpu_notifier_register_begin();
+
+ __register_cpu_notifier(&zs_cpu_nb);
+ for_each_online_cpu(cpu) {
+ ret = zs_cpu_notifier(NULL, CPU_UP_PREPARE, (void *)(long)cpu);
+ if (notifier_to_errno(ret))
+ goto fail;
+ }
+
+ cpu_notifier_register_done();
+
+#ifdef CONFIG_ZPOOL
+ zpool_register_driver(&zs_zpool_driver);
+#endif
+
+ return 0;
+
+fail:
+ for_each_online_cpu(cpu)
+ zs_cpu_notifier(NULL, CPU_UP_CANCELED, (void *)(long)cpu);
+ __unregister_cpu_notifier(&zs_cpu_nb);
+
+ cpu_notifier_register_done();
+
+ return notifier_to_errno(ret);
+}
+
+static void __exit zs_exit(void)
+{
+ int cpu;
+
+#ifdef CONFIG_ZPOOL
+ zpool_unregister_driver(&zs_zpool_driver);
+#endif
+
+ cpu_notifier_register_begin();
+
+ for_each_online_cpu(cpu)
+ zs_cpu_notifier(NULL, CPU_DEAD, (void *)(long)cpu);
+ __unregister_cpu_notifier(&zs_cpu_nb);
+
+ cpu_notifier_register_done();
+}
+
module_init(zs_init);
module_exit(zs_exit);
--
1.7.9.5
--
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