Commit ff610a1d authored by Bob Liu's avatar Bob Liu Committed by Linus Torvalds
Browse files

mm: cleancache: clean up cleancache_enabled

cleancache_ops is used to decide whether backend is registered.
So now cleancache_enabled is always true if defined CONFIG_CLEANCACHE.

Signed-off-by: default avatarBob Liu <>
Cc: Wanpeng Li <>
Cc: Andor Daam <>
Cc: Dan Magenheimer <>
Cc: Florian Schmaus <>
Cc: Konrad Rzeszutek Wilk <>
Cc: Minchan Kim <>
Cc: Stefan Hengelein <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 833f8662
......@@ -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;
#define cleancache_enabled (1)
static inline bool cleancache_fs_enabled(struct page *page)
return page->mapping->host->i_sb->cleancache_poolid >= 0;
......@@ -18,16 +18,6 @@
#include <linux/debugfs.h>
#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;
* 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;
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