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OpenCloudOS-Kernel
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mm: frontswap: split out function to clear a page out 

Signed-off-by: Sasha Levin <levinsasha928@gmail.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Sasha Levin 2012-06-10 12:51:07 +02:00 committed by Konrad Rzeszutek Wilk
parent f9f08103eb
commit 611edfed29
1 changed files with 9 additions and 6 deletions
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15
mm/frontswap.c
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@ -114,6 +114,12 @@ void __frontswap_init(unsigned type)
}
EXPORT_SYMBOL(__frontswap_init);
static inline void __frontswap_clear(struct swap_info_struct *sis, pgoff_t offset)
{
frontswap_clear(sis, offset);
atomic_dec(&sis->frontswap_pages);
}
/*
* "Store" data from a page to frontswap and associate it with the page's
* swaptype and offset. Page must be locked and in the swap cache.
@ -145,10 +151,8 @@ int __frontswap_store(struct page *page)
the (older) page from frontswap
*/
inc_frontswap_failed_stores();
if (dup) {
frontswap_clear(sis, offset);
atomic_dec(&sis->frontswap_pages);
}
if (dup)
__frontswap_clear(sis, offset);
}
if (frontswap_writethrough_enabled)
/* report failure so swap also writes to swap device */
@ -191,8 +195,7 @@ void __frontswap_invalidate_page(unsigned type, pgoff_t offset)
BUG_ON(sis == NULL);
if (frontswap_test(sis, offset)) {
frontswap_ops.invalidate_page(type, offset);
atomic_dec(&sis->frontswap_pages);
frontswap_clear(sis, offset);
__frontswap_clear(sis, offset);
inc_frontswap_invalidates();
}
}