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mm/readahead: pass readahead_control to force_page_cache_ra

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Reimplement force_page_cache_readahead() as a wrapper around
force_page_cache_ra().  Pass the existing readahead_control from
page_cache_sync_readahead().

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Eric Biggers <ebiggers@google.com>
Link: https://lkml.kernel.org/r/20200903140844.14194-7-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells
2020-10-15 20:06:24 -07:00
committed by Linus Torvalds
parent 6e4af69ae9
commit 7b3df3b9ac
2 changed files with 19 additions and 12 deletions
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13
mm/internal.h
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@@ -49,10 +49,15 @@ void unmap_page_range(struct mmu_gather *tlb,
unsigned long addr, unsigned long end,
struct zap_details *details);
void force_page_cache_readahead(struct address_space *, struct file *,
pgoff_t index, unsigned long nr_to_read);
void do_page_cache_ra(struct readahead_control *,
unsigned long nr_to_read, unsigned long lookahead_size);
void do_page_cache_ra(struct readahead_control *, unsigned long nr_to_read,
unsigned long lookahead_size);
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)
{
DEFINE_READAHEAD(ractl, file, mapping, index);
force_page_cache_ra(&ractl, nr_to_read);
}
/*
* Submit IO for the read-ahead request in file_ra_state.