[PATCH 1/9] readahead: move max_sane_readahead() calls into force_page_cache_readahead()

[Wu Fengguang]

Impact: code simplification.

Cc: Nick Piggin <npiggin@xxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
---
 mm/fadvise.c   |    2 +-
 mm/filemap.c   |    3 +--
 mm/madvise.c   |    3 +--
 mm/readahead.c |    1 +
 4 files changed, 4 insertions(+), 5 deletions(-)

--- mm.orig/mm/fadvise.c
+++ mm/mm/fadvise.c
@@ -101,7 +101,7 @@ SYSCALL_DEFINE(fadvise64_64)(int fd, lof
 		
 		ret = force_page_cache_readahead(mapping, file,
 				start_index,
-				max_sane_readahead(nrpages));
+				nrpages);
 		if (ret > 0)
 			ret = 0;
 		break;
--- mm.orig/mm/filemap.c
+++ mm/mm/filemap.c
@@ -1389,8 +1389,7 @@ do_readahead(struct address_space *mappi
 	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;
 }
 
--- mm.orig/mm/madvise.c
+++ mm/mm/madvise.c
@@ -123,8 +123,7 @@ static long madvise_willneed(struct vm_a
 		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;
 }
 
--- mm.orig/mm/readahead.c
+++ mm/mm/readahead.c
@@ -210,6 +210,7 @@ int force_page_cache_readahead(struct ad
 	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;
 

-- 

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