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authorAndrew Morton <akpm@osdl.org>2005-11-07 00:59:28 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:37 -0800
commit7361f4d8ca65d23a18ba009b4484612183332c2f (patch)
tree7e3dcf22f7d191bcbeb78eb633ae067a76163124 /include/linux
parentbf8f972d3a1daf969cf44f64cc36d53bfd76441f (diff)
[PATCH] readahead commentary
Add a few comments surrounding the generic readahead API. Also convert some ulongs into pgoff_t: the identifier for PAGE_CACHE_SIZE offsets into pagecache. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mm.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5c1fb0a2e80..7b115feca4d 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -932,13 +932,13 @@ int write_one_page(struct page *page, int wait);
* turning readahead off */
int do_page_cache_readahead(struct address_space *mapping, struct file *filp,
- unsigned long offset, unsigned long nr_to_read);
+ pgoff_t offset, unsigned long nr_to_read);
int force_page_cache_readahead(struct address_space *mapping, struct file *filp,
- unsigned long offset, unsigned long nr_to_read);
-unsigned long page_cache_readahead(struct address_space *mapping,
+ pgoff_t offset, unsigned long nr_to_read);
+unsigned long page_cache_readahead(struct address_space *mapping,
struct file_ra_state *ra,
struct file *filp,
- unsigned long offset,
+ pgoff_t offset,
unsigned long size);
void handle_ra_miss(struct address_space *mapping,
struct file_ra_state *ra, pgoff_t offset);