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mm: delete find_get_entries_tag

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I removed the only user of this and hadn't noticed it was now unused.

Link: http://lkml.kernel.org/r/20190430152929.21813-1-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Ross Zwisler <zwisler@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2019-05-13 17:23:20 -07:00 committed by Linus Torvalds
parent b3b07077b0
commit a1b8e6abf3
2 changed files with 0 additions and 64 deletions
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3
include/linux/pagemap.h
View File

@ -373,9 +373,6 @@ static inline unsigned find_get_pages_tag(struct address_space *mapping,
return find_get_pages_range_tag(mapping, index, (pgoff_t)-1, tag, return find_get_pages_range_tag(mapping, index, (pgoff_t)-1, tag,
nr_pages, pages); nr_pages, pages);
} }
unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
xa_mark_t tag, unsigned int nr_entries,
struct page **entries, pgoff_t *indices);
struct page *grab_cache_page_write_begin(struct address_space *mapping, struct page *grab_cache_page_write_begin(struct address_space *mapping,
pgoff_t index, unsigned flags); pgoff_t index, unsigned flags);

61
mm/filemap.c
View File

@ -1941,67 +1941,6 @@ out:
} }
EXPORT_SYMBOL(find_get_pages_range_tag); EXPORT_SYMBOL(find_get_pages_range_tag);
/**
* find_get_entries_tag - find and return entries that match @tag
* @mapping: the address_space to search
* @start: the starting page cache index
* @tag: the tag index
* @nr_entries: the maximum number of entries
* @entries: where the resulting entries are placed
* @indices: the cache indices corresponding to the entries in @entries
*
* Like find_get_entries, except we only return entries which are tagged with
* @tag.
*
* Return: the number of entries which were found.
*/
unsigned find_get_entries_tag(struct address_space *mapping, pgoff_t start,
xa_mark_t tag, unsigned int nr_entries,
struct page **entries, pgoff_t *indices)
{
XA_STATE(xas, &mapping->i_pages, start);
struct page *page;
unsigned int ret = 0;
if (!nr_entries)
return 0;
rcu_read_lock();
xas_for_each_marked(&xas, page, ULONG_MAX, tag) {
if (xas_retry(&xas, page))
continue;
/*
* A shadow entry of a recently evicted page, a swap
* entry from shmem/tmpfs or a DAX entry. Return it
* without attempting to raise page count.
*/
if (xa_is_value(page))
goto export;
if (!page_cache_get_speculative(page))
goto retry;
/* Has the page moved or been split? */
if (unlikely(page != xas_reload(&xas)))
goto put_page;
page = find_subpage(page, xas.xa_index);
export:
indices[ret] = xas.xa_index;
entries[ret] = page;
if (++ret == nr_entries)
break;
continue;
put_page:
put_page(page);
retry:
xas_reset(&xas);
}
rcu_read_unlock();
return ret;
}
EXPORT_SYMBOL(find_get_entries_tag);
/* /*
* CD/DVDs are error prone. When a medium error occurs, the driver may fail * CD/DVDs are error prone. When a medium error occurs, the driver may fail
* a _large_ part of the i/o request. Imagine the worst scenario: * a _large_ part of the i/o request. Imagine the worst scenario: