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filemap: remove find_get_pages_contig()

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All callers of find_get_pages_contig() have been removed, so it is no
longer needed.

Link: https://lkml.kernel.org/r/20220824004023.77310-8-vishal.moola@gmail.com
Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Chris Mason <clm@fb.com>
Cc: David Sterba <dsterba@suse.com>
Cc: David Sterba <dsterb@suse.com>
Cc: Josef Bacik <josef@toxicpanda.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Vishal Moola (Oracle) 2022-08-23 17:40:23 -07:00 committed by Andrew Morton
parent 60aac486da
commit 48658d8509
2 changed files with 0 additions and 62 deletions
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2
include/linux/pagemap.h
View File

@ -720,8 +720,6 @@ unsigned filemap_get_folios(struct address_space *mapping, pgoff_t *start,
pgoff_t end, struct folio_batch *fbatch);
unsigned filemap_get_folios_contig(struct address_space *mapping,
pgoff_t *start, pgoff_t end, struct folio_batch *fbatch);
unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t start,
unsigned int nr_pages, struct page **pages);
unsigned find_get_pages_range_tag(struct address_space *mapping, pgoff_t *index,
pgoff_t end, xa_mark_t tag, unsigned int nr_pages,
struct page **pages);

60
mm/filemap.c
View File

@ -2269,66 +2269,6 @@ out:
}
EXPORT_SYMBOL(filemap_get_folios_contig);
/**
* find_get_pages_contig - gang contiguous pagecache lookup
* @mapping: The address_space to search
* @index: The starting page index
* @nr_pages: The maximum number of pages
* @pages: Where the resulting pages are placed
*
* find_get_pages_contig() works exactly like find_get_pages_range(),
* except that the returned number of pages are guaranteed to be
* contiguous.
*
* Return: the number of pages which were found.
*/
unsigned find_get_pages_contig(struct address_space *mapping, pgoff_t index,
unsigned int nr_pages, struct page **pages)
{
XA_STATE(xas, &mapping->i_pages, index);
struct folio *folio;
unsigned int ret = 0;
if (unlikely(!nr_pages))
return 0;
rcu_read_lock();
for (folio = xas_load(&xas); folio; folio = xas_next(&xas)) {
if (xas_retry(&xas, folio))
continue;
/*
* If the entry has been swapped out, we can stop looking.
* No current caller is looking for DAX entries.
*/
if (xa_is_value(folio))
break;
if (!folio_try_get_rcu(folio))
goto retry;
if (unlikely(folio != xas_reload(&xas)))
goto put_page;
again:
pages[ret] = folio_file_page(folio, xas.xa_index);
if (++ret == nr_pages)
break;
if (folio_more_pages(folio, xas.xa_index, ULONG_MAX)) {
xas.xa_index++;
folio_ref_inc(folio);
goto again;
}
continue;
put_page:
folio_put(folio);
retry:
xas_reset(&xas);
}
rcu_read_unlock();
return ret;
}
EXPORT_SYMBOL(find_get_pages_contig);
/**
* find_get_pages_range_tag - Find and return head pages matching @tag.
* @mapping: the address_space to search