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frontswap: remove frontswap_curr_pages

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frontswap_curr_pages is never called, so remove it.

Link: https://lkml.kernel.org/r/20211224062246.1258487-6-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 22:14:47 -08:00 committed by Linus Torvalds
parent 0b364446d7
commit 3e8e1af63d
2 changed files with 0 additions and 29 deletions
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1
include/linux/frontswap.h
View File

@ -24,7 +24,6 @@ struct frontswap_ops {
};
extern void frontswap_register_ops(struct frontswap_ops *ops);
extern unsigned long frontswap_curr_pages(void);
extern bool __frontswap_test(struct swap_info_struct *, pgoff_t);
extern void __frontswap_init(unsigned type, unsigned long *map);

28
mm/frontswap.c
View File

@ -330,34 +330,6 @@ void __frontswap_invalidate_area(unsigned type)
}
EXPORT_SYMBOL(__frontswap_invalidate_area);
static unsigned long __frontswap_curr_pages(void)
{
unsigned long totalpages = 0;
struct swap_info_struct *si = NULL;
assert_spin_locked(&swap_lock);
plist_for_each_entry(si, &swap_active_head, list)
totalpages += atomic_read(&si->frontswap_pages);
return totalpages;
}
/*
* Count and return the number of frontswap pages across all
* swap devices. This is exported so that backend drivers can
* determine current usage without reading debugfs.
*/
unsigned long frontswap_curr_pages(void)
{
unsigned long totalpages = 0;
spin_lock(&swap_lock);
totalpages = __frontswap_curr_pages();
spin_unlock(&swap_lock);
return totalpages;
}
EXPORT_SYMBOL(frontswap_curr_pages);
static int __init init_frontswap(void)
{
#ifdef CONFIG_DEBUG_FS