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Subject[PATCH 03/13] frontswap: remove frontswap_tmem_exclusive_gets
Date
frontswap_tmem_exclusive_gets is never called, so remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/frontswap.h | 2 --
mm/frontswap.c | 23 +----------------------
2 files changed, 1 insertion(+), 24 deletions(-)

diff --git a/include/linux/frontswap.h b/include/linux/frontswap.h
index 4a03fda415725..83a56392cc7f6 100644
--- a/include/linux/frontswap.h
+++ b/include/linux/frontswap.h
@@ -26,8 +26,6 @@ struct frontswap_ops {
extern void frontswap_register_ops(struct frontswap_ops *ops);
extern void frontswap_shrink(unsigned long);
extern unsigned long frontswap_curr_pages(void);
-#define FRONTSWAP_HAS_EXCLUSIVE_GETS
-extern void frontswap_tmem_exclusive_gets(bool);

extern bool __frontswap_test(struct swap_info_struct *, pgoff_t);
extern void __frontswap_init(unsigned type, unsigned long *map);
diff --git a/mm/frontswap.c b/mm/frontswap.c
index 51a662a839559..dba7f087ee862 100644
--- a/mm/frontswap.c
+++ b/mm/frontswap.c
@@ -32,13 +32,6 @@ static struct frontswap_ops *frontswap_ops __read_mostly;
#define for_each_frontswap_ops(ops) \
for ((ops) = frontswap_ops; (ops); (ops) = (ops)->next)

-/*
- * If enabled, the underlying tmem implementation is capable of doing
- * exclusive gets, so frontswap_load, on a successful tmem_get must
- * mark the page as no longer in frontswap AND mark it dirty.
- */
-static bool frontswap_tmem_exclusive_gets_enabled __read_mostly;
-
#ifdef CONFIG_DEBUG_FS
/*
* Counters available via /sys/kernel/debug/frontswap (if debugfs is
@@ -160,15 +153,6 @@ void frontswap_register_ops(struct frontswap_ops *ops)
}
EXPORT_SYMBOL(frontswap_register_ops);

-/*
- * Enable/disable frontswap exclusive gets (see above).
- */
-void frontswap_tmem_exclusive_gets(bool enable)
-{
- frontswap_tmem_exclusive_gets_enabled = enable;
-}
-EXPORT_SYMBOL(frontswap_tmem_exclusive_gets);
-
/*
* Called when a swap device is swapon'd.
*/
@@ -296,13 +280,8 @@ int __frontswap_load(struct page *page)
if (!ret) /* successful load */
break;
}
- if (ret == 0) {
+ if (ret == 0)
inc_frontswap_loads();
- if (frontswap_tmem_exclusive_gets_enabled) {
- SetPageDirty(page);
- __frontswap_clear(sis, offset);
- }
- }
return ret;
}
EXPORT_SYMBOL(__frontswap_load);
--
2.30.2
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