readahead: move max_sane_readahead() calls into force_page_cache_readahead()

Impact: code simplification.

Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

4 files changed, 4 insertions, 5 deletions

diff --git a/mm/fadvise.c b/mm/fadvise.c
index 54a0f8040afa..e43359214f6f 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -101,7 +101,7 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, loff_t offset, loff_t len, int advice)
                 
                 ret = force_page_cache_readahead(mapping, file,
                                 start_index,
-                                max_sane_readahead(nrpages));
+                                nrpages);
                 if (ret > 0)
                         ret = 0;
                 break;
diff --git a/mm/filemap.c b/mm/filemap.c
index 1b60f30cebfa..dcef9fd6b92e 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1390,8 +1390,7 @@ do_readahead(struct address_space *mapping, struct file *filp,
         if (!mapping || !mapping->a_ops || !mapping->a_ops->readpage)
                 return -EINVAL;
 
-        force_page_cache_readahead(mapping, filp, index,
-                                        max_sane_readahead(nr));
+        force_page_cache_readahead(mapping, filp, index, nr);
         return 0;
 }
 
diff --git a/mm/madvise.c b/mm/madvise.c
index b9ce574827c8..e994dcb479d6 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -123,8 +123,7 @@ static long madvise_willneed(struct vm_area_struct * vma,
                 end = vma->vm_end;
         end = ((end - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
 
-        force_page_cache_readahead(file->f_mapping,
-                        file, start, max_sane_readahead(end - start));
+        force_page_cache_readahead(file->f_mapping, file, start, end - start);
         return 0;
 }
 
diff --git a/mm/readahead.c b/mm/readahead.c
index 133b6d525513..a224182a3a63 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -210,6 +210,7 @@ int force_page_cache_readahead(struct address_space *mapping, struct file *filp,
         if (unlikely(!mapping->a_ops->readpage && !mapping->a_ops->readpages))
                 return -EINVAL;
 
+        nr_to_read = max_sane_readahead(nr_to_read);
         while (nr_to_read) {
                 int err;