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mm/readahead: Switch to page_cache_ra_order

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do_page_cache_ra() was being exposed for the benefit of
do_sync_mmap_readahead().  Switch it over to page_cache_ra_order()
partly because it's a better interface but mostly for the benefit of
the next patch.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2021-07-24 23:26:14 -04:00
parent 1854bc6e24
commit 56a4d67c26
3 changed files with 5 additions and 5 deletions
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2
mm/filemap.c
View File

@ -3027,7 +3027,7 @@ static struct file *do_sync_mmap_readahead(struct vm_fault *vmf)
ra->size = ra->ra_pages;
ra->async_size = ra->ra_pages / 4;
ractl._index = ra->start;
do_page_cache_ra(&ractl, ra->size, ra->async_size);
page_cache_ra_order(&ractl, ra, 0);
return fpin;
}

4
mm/internal.h
View File

@ -79,8 +79,8 @@ void unmap_page_range(struct mmu_gather *tlb,
unsigned long addr, unsigned long end,
struct zap_details *details);
void do_page_cache_ra(struct readahead_control *, unsigned long nr_to_read,
unsigned long lookahead_size);
void page_cache_ra_order(struct readahead_control *, struct file_ra_state *,
unsigned int order);
void force_page_cache_ra(struct readahead_control *, unsigned long nr);
static inline void force_page_cache_readahead(struct address_space *mapping,
struct file *file, pgoff_t index, unsigned long nr_to_read)

4
mm/readahead.c
View File

@ -247,7 +247,7 @@ EXPORT_SYMBOL_GPL(page_cache_ra_unbounded);
* behaviour which would occur if page allocations are causing VM writeback.
* We really don't want to intermingle reads and writes like that.
*/
void do_page_cache_ra(struct readahead_control *ractl,
static void do_page_cache_ra(struct readahead_control *ractl,
unsigned long nr_to_read, unsigned long lookahead_size)
{
struct inode *inode = ractl->mapping->host;
@ -462,7 +462,7 @@ static inline int ra_alloc_folio(struct readahead_control *ractl, pgoff_t index,
return err;
}
static void page_cache_ra_order(struct readahead_control *ractl,
void page_cache_ra_order(struct readahead_control *ractl,
struct file_ra_state *ra, unsigned int new_order)
{
struct address_space *mapping = ractl->mapping;