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update "mm/zsmalloc: don't fail if can't create debugfs info"

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Some updates to commit d34f615720 ("mm/zsmalloc: don't fail if can't
create debugfs info"):

 - add pr_warn to all stat failure cases
 - do not prevent module loading on stat failure

Link: http://lkml.kernel.org/r/1463671123-5479-1-git-send-email-ddstreet@ieee.org
Signed-off-by: Dan Streetman <ddstreet@ieee.org>
Reviewed-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Dan Streetman <dan.streetman@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Dan Streetman 2016-05-26 15:16:27 -07:00 committed by Linus Torvalds
parent 3017cd63f2
commit 4abaac9b73
1 changed files with 16 additions and 19 deletions
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35
mm/zsmalloc.c
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@ -45,6 +45,8 @@
*
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
@ -483,16 +485,16 @@ static inline unsigned long zs_stat_get(struct size_class *class,
#ifdef CONFIG_ZSMALLOC_STAT
static int __init zs_stat_init(void)
static void __init zs_stat_init(void)
{
if (!debugfs_initialized())
return -ENODEV;
if (!debugfs_initialized()) {
pr_warn("debugfs not available, stat dir not created\n");
return;
}
zs_stat_root = debugfs_create_dir("zsmalloc", NULL);
if (!zs_stat_root)
return -ENOMEM;
return 0;
pr_warn("debugfs 'zsmalloc' stat dir creation failed\n");
}
static void __exit zs_stat_exit(void)
@ -577,8 +579,10 @@ static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
{
struct dentry *entry;
if (!zs_stat_root)
if (!zs_stat_root) {
pr_warn("no root stat dir, not creating <%s> stat dir\n", name);
return;
}
entry = debugfs_create_dir(name, zs_stat_root);
if (!entry) {
@ -592,7 +596,8 @@ static void zs_pool_stat_create(struct zs_pool *pool, const char *name)
if (!entry) {
pr_warn("%s: debugfs file entry <%s> creation failed\n",
name, "classes");
return;
debugfs_remove_recursive(pool->stat_dentry);
pool->stat_dentry = NULL;
}
}
@ -602,9 +607,8 @@ static void zs_pool_stat_destroy(struct zs_pool *pool)
}
#else /* CONFIG_ZSMALLOC_STAT */
static int __init zs_stat_init(void)
static void __init zs_stat_init(void)
{
return 0;
}
static void __exit zs_stat_exit(void)
@ -2011,17 +2015,10 @@ static int __init zs_init(void)
zpool_register_driver(&zs_zpool_driver);
#endif
ret = zs_stat_init();
if (ret) {
pr_err("zs stat initialization failed\n");
goto stat_fail;
}
zs_stat_init();
return 0;
stat_fail:
#ifdef CONFIG_ZPOOL
zpool_unregister_driver(&zs_zpool_driver);
#endif
notifier_fail:
zs_unregister_cpu_notifier();