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mm: remove page_swap_info()

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It's more efficient to get the swap_info_struct by calling
swp_swap_info() directly.

Link: https://lkml.kernel.org/r/20231213215842.671461-12-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-12-13 21:58:40 +00:00 committed by Andrew Morton
parent c9bdf768dd
commit 69fe7d67cb
3 changed files with 3 additions and 10 deletions
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3
include/linux/swap.h
View File

@ -487,8 +487,7 @@ extern sector_t swapdev_block(int, pgoff_t);
extern int __swap_count(swp_entry_t entry);
extern int swap_swapcount(struct swap_info_struct *si, swp_entry_t entry);
extern int swp_swapcount(swp_entry_t entry);
extern struct swap_info_struct *page_swap_info(struct page *);
extern struct swap_info_struct *swp_swap_info(swp_entry_t entry);
struct swap_info_struct *swp_swap_info(swp_entry_t entry);
struct backing_dev_info;
extern int init_swap_address_space(unsigned int type, unsigned long nr_pages);
extern void exit_swap_address_space(unsigned int type);

2
mm/swap.h
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@ -60,7 +60,7 @@ struct page *swapin_readahead(swp_entry_t entry, gfp_t flag,
static inline unsigned int folio_swap_flags(struct folio *folio)
{
return page_swap_info(&folio->page)->flags;
return swp_swap_info(folio->swap)->flags;
}
#else /* CONFIG_SWAP */
struct swap_iocb;

8
mm/swapfile.c
View File

@ -3369,18 +3369,12 @@ struct swap_info_struct *swp_swap_info(swp_entry_t entry)
return swap_type_to_swap_info(swp_type(entry));
}
struct swap_info_struct *page_swap_info(struct page *page)
{
swp_entry_t entry = page_swap_entry(page);
return swp_swap_info(entry);
}
/*
* out-of-line methods to avoid include hell.
*/
struct address_space *swapcache_mapping(struct folio *folio)
{
return page_swap_info(&folio->page)->swap_file->f_mapping;
return swp_swap_info(folio->swap)->swap_file->f_mapping;
}
EXPORT_SYMBOL_GPL(swapcache_mapping);