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mm: cleancache: clean up cleancache_enabled

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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 <[email protected]>
Cc: Wanpeng Li <[email protected]>
Cc: Andor Daam <[email protected]>
Cc: Dan Magenheimer <[email protected]>
Cc: Florian Schmaus <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Stefan Hengelein <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Bob Liu 2013-04-30 15:26:58 -07:00 • committed by Linus Torvalds
commit ff610a1d55
2 changed files with 1 additions and 12 deletions
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11
mm/cleancache.c
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@ -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;
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)