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Merge branch 'stable/for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm

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Pull cleancache cleanups from Konrad Rzeszutek Wilk:
 "Simple cleanups"

* 'stable/for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm:
  include/linux/cleancache.h: Clean up code
  cleancache: constify cleancache_ops structure
This commit is contained in:
Linus Torvalds 2016-01-29 15:13:48 -08:00
commit 2973737012
3 changed files with 10 additions and 12 deletions
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2
drivers/xen/tmem.c
View File

@ -242,7 +242,7 @@ static int tmem_cleancache_init_shared_fs(char *uuid, size_t pagesize)
return xen_tmem_new_pool(shared_uuid, TMEM_POOL_SHARED, pagesize);
}
static struct cleancache_ops tmem_cleancache_ops = {
static const struct cleancache_ops tmem_cleancache_ops = {
.put_page = tmem_cleancache_put_page,
.get_page = tmem_cleancache_get_page,
.invalidate_page = tmem_cleancache_flush_page,

16
include/linux/cleancache.h
View File

@ -37,7 +37,7 @@ struct cleancache_ops {
void (*invalidate_fs)(int);
};
extern int cleancache_register_ops(struct cleancache_ops *ops);
extern int cleancache_register_ops(const struct cleancache_ops *ops);
extern void __cleancache_init_fs(struct super_block *);
extern void __cleancache_init_shared_fs(struct super_block *);
extern int __cleancache_get_page(struct page *);
@ -48,14 +48,14 @@ extern void __cleancache_invalidate_fs(struct super_block *);
#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;
}
static inline bool cleancache_fs_enabled_mapping(struct address_space *mapping)
{
return mapping->host->i_sb->cleancache_poolid >= 0;
}
static inline bool cleancache_fs_enabled(struct page *page)
{
return cleancache_fs_enabled_mapping(page->mapping);
}
#else
#define cleancache_enabled (0)
#define cleancache_fs_enabled(_page) (0)
@ -89,11 +89,9 @@ static inline void cleancache_init_shared_fs(struct super_block *sb)
static inline int cleancache_get_page(struct page *page)
{
int ret = -1;
if (cleancache_enabled && cleancache_fs_enabled(page))
ret = __cleancache_get_page(page);
return ret;
return __cleancache_get_page(page);
return -1;
}
static inline void cleancache_put_page(struct page *page)

4
mm/cleancache.c
View File

@ -22,7 +22,7 @@
* cleancache_ops is set by cleancache_register_ops to contain the pointers
* to the cleancache "backend" implementation functions.
*/
static struct cleancache_ops *cleancache_ops __read_mostly;
static const struct cleancache_ops *cleancache_ops __read_mostly;
/*
* Counters available via /sys/kernel/debug/cleancache (if debugfs is
@ -49,7 +49,7 @@ static void cleancache_register_ops_sb(struct super_block *sb, void *unused)
/*
* Register operations for cleancache. Returns 0 on success.
*/
int cleancache_register_ops(struct cleancache_ops *ops)
int cleancache_register_ops(const struct cleancache_ops *ops)
{
if (cmpxchg(&cleancache_ops, NULL, ops))
return -EBUSY;