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frontswap: remove frontswap_tmem_exclusive_gets

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frontswap_tmem_exclusive_gets is never called, so remove it.

Link: https://lkml.kernel.org/r/20211224062246.1258487-4-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Konrad Rzeszutek Wilk <Konrad.wilk@oracle.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Seth Jennings <sjenning@redhat.com>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2022-01-21 22:14:41 -08:00 committed by Linus Torvalds
parent 3d6035f136
commit 71024cb4a0
2 changed files with 1 additions and 24 deletions
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2
include/linux/frontswap.h
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@ -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);

23
mm/frontswap.c
View File

@ -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);