[PATCH 8/9] readahead: move max_sane_readahead() calls into force_page_cache_readahead()

Fengguang Wu
2007-12-22T01:33:43Z

[-- Attachment #1: readahead-check-max_sane_readahead.patch --]
[-- Type: text/plain, Size: 1729 bytes --]

Simplify code by moving max_sane_readahead() calls into
force_page_cache_readahead().

Signed-off-by: Fengguang Wu <wfg@mail.ustc.edu.cn>
---
mm/fadvise.c | 2 +-
mm/filemap.c | 3 +--
mm/madvise.c | 3 +--
mm/readahead.c | 1 +
4 files changed, 4 insertions(+), 5 deletions(-)

--- linux-2.6.24-rc5-mm1.orig/mm/fadvise.c
+++ linux-2.6.24-rc5-mm1/mm/fadvise.c
@@ -89,7 +89,7 @@ asmlinkage long sys_fadvise64_64(int fd,

ret = force_page_cache_readahead(mapping, file,
start_index,
- max_sane_readahead(nrpages));
+ nrpages);
if (ret > 0)
ret = 0;
break;
--- linux-2.6.24-rc5-mm1.orig/mm/filemap.c
+++ linux-2.6.24-rc5-mm1/mm/filemap.c
@@ -1242,8 +1242,7 @@ 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;
}

--- linux-2.6.24-rc5-mm1.orig/mm/madvise.c
+++ linux-2.6.24-rc5-mm1/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;
}

--- linux-2.6.24-rc5-mm1.orig/mm/readahead.c
+++ linux-2.6.24-rc5-mm1/mm/readahead.c
@@ -187,6 +187,7 @@ 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;

--