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| author | Bob Liu <lliubbo@gmail.com> | 2013-04-30 15:26:58 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 17:04:01 -0700 |
| commit | ff610a1d55da22bf95bbc6a8b193e052169b34b7 (patch) | |
| tree | 0c96ecc78d4d3818825f74871357b94134a22eac | |
| parent | 833f8662af9659508afc3cb80f09138eade378e2 (diff) | |
| download | linux-ff610a1d55da22bf95bbc6a8b193e052169b34b7.tar.gz linux-ff610a1d55da22bf95bbc6a8b193e052169b34b7.tar.bz2 linux-ff610a1d55da22bf95bbc6a8b193e052169b34b7.zip | |
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: Bob Liu <lliubbo@gmail.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Andor Daam <andor.daam@googlemail.com>
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Florian Schmaus <fschmaus@gmail.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Stefan Hengelein <ilendir@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/cleancache.h | 2 | ||||
| -rw-r--r-- | mm/cleancache.c | 11 |
2 files changed, 1 insertions, 12 deletions
diff --git a/include/linux/cleancache.h b/include/linux/cleancache.h index 3af5ea839558..4ce9056b31a8 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 b3ae19b72035..5875f48ce279 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) |