count_history_pages does only call page_cache_prev_hole in rcu_lock
context using address_space mapping. There's no need to have file_ra_state
here.

Cc: Andrew Morton <a...@linux-foundation.org>
Cc: Fengguang Wu <fengguang...@intel.com>
Signed-off-by: Fabian Frederick <f...@skynet.be>
---
 mm/readahead.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/mm/readahead.c b/mm/readahead.c
index 0ca36a7..17b9172 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -326,7 +326,6 @@ static unsigned long get_next_ra_size(struct file_ra_state 
*ra,
  *     - thrashing threshold in memory tight systems
  */
 static pgoff_t count_history_pages(struct address_space *mapping,
-                                  struct file_ra_state *ra,
                                   pgoff_t offset, unsigned long max)
 {
        pgoff_t head;
@@ -349,7 +348,7 @@ static int try_context_readahead(struct address_space 
*mapping,
 {
        pgoff_t size;
 
-       size = count_history_pages(mapping, ra, offset, max);
+       size = count_history_pages(mapping, offset, max);
 
        /*
         * not enough history pages:
-- 
1.8.4.5

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