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-rw-r--r--mm/filemap.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 88354ae..c974a28 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1556,6 +1556,8 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma,
/* If we don't want any read-ahead, don't bother */
if (VM_RandomReadHint(vma))
return;
+ if (!ra->ra_pages)
+ return;
if (VM_SequentialReadHint(vma) ||
offset - 1 == (ra->prev_pos >> PAGE_CACHE_SHIFT)) {
@@ -1578,12 +1580,10 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma,
* mmap read-around
*/
ra_pages = max_sane_readahead(ra->ra_pages);
- if (ra_pages) {
- ra->start = max_t(long, 0, offset - ra_pages/2);
- ra->size = ra_pages;
- ra->async_size = 0;
- ra_submit(ra, mapping, file);
- }
+ ra->start = max_t(long, 0, offset - ra_pages / 2);
+ ra->size = ra_pages;
+ ra->async_size = 0;
+ ra_submit(ra, mapping, file);
}
/*
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