cleancache_ops is used to decide whether backend is registered.
So now cleancache_enabled is always true if defined CONFIG_CLEANCACHE.
Signed-off-by: Bob Liu <lliubbo@xxxxxxxxx>
---
include/linux/cleancache.h | 2 +-
mm/cleancache.c | 11 -----------
2 files changed, 1 insertion(+), 12 deletions(-)
diff --git a/include/linux/cleancache.h b/include/linux/cleancache.h
index 3af5ea8..4ce9056 100644
--- a/include/linux/cleancache.h
+++ b/include/linux/cleancache.h
@@ -42,9 +42,9 @@ extern void __cleancache_put_page(struct page *);
extern void __cleancache_invalidate_page(struct address_space *, struct page *);
extern void __cleancache_invalidate_inode(struct address_space *);
extern void __cleancache_invalidate_fs(struct super_block *);
-extern int cleancache_enabled;
#ifdef CONFIG_CLEANCACHE
+#define cleancache_enabled (1)
static inline bool cleancache_fs_enabled(struct page *page)
{
return page->mapping->host->i_sb->cleancache_poolid >= 0;
diff --git a/mm/cleancache.c b/mm/cleancache.c
index 8d8fb4e..4ac1b57 100644
--- a/mm/cleancache.c
+++ b/mm/cleancache.c
@@ -19,16 +19,6 @@
#include <linux/cleancache.h>
/*
- * This global enablement flag may be read thousands of times per second
- * by cleancache_get/put/invalidate even on systems where cleancache_ops
- * is not claimed (e.g. cleancache is config'ed on but remains
- * disabled), so is preferred to the slower alternative: a function
- * call that checks a non-global.
- */
-int cleancache_enabled __read_mostly;
-EXPORT_SYMBOL(cleancache_enabled);
-
-/*
* cleancache_ops is set by cleancache_ops_register to contain the pointers
* to the cleancache "backend" implementation functions.
*/
@@ -414,7 +404,6 @@ static int __init init_cleancache(void)
fs_poolid_map[i] = FS_UNKNOWN;
shared_fs_poolid_map[i] = FS_UNKNOWN;
}
- cleancache_enabled = 1;
return 0;
}
module_init(init_cleancache)
--
1.7.10.4
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