From: Fabian Frederick <fabf@xxxxxxxxx>
3.12-stable review patch. If anyone has any objections, please let me know.
===============
commit 29f175d125f0f3a9503af8a5596f93d714cceb08 upstream.
Commit f9acc8c7b35a ("readahead: sanify file_ra_state names") left
ra_submit with a single function call.
Move ra_submit to internal.h and inline it to save some stack. Thanks
to Andrew Morton for commenting different versions.
Signed-off-by: Fabian Frederick <fabf@xxxxxxxxx>
Suggested-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Mel Gorman <mgorman@xxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
include/linux/mm.h | 3 ---
mm/internal.h | 15 +++++++++++++++
mm/readahead.c | 21 +++------------------
3 files changed, 18 insertions(+), 21 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 96fc7ddd307f..2b3a5330dcf2 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1631,9 +1631,6 @@ void page_cache_async_readahead(struct address_space *mapping,
unsigned long size);
unsigned long max_sane_readahead(unsigned long nr);
-unsigned long ra_submit(struct file_ra_state *ra,
- struct address_space *mapping,
- struct file *filp);
/* Generic expand stack which grows the stack according to GROWS{UP,DOWN} */
extern int expand_stack(struct vm_area_struct *vma, unsigned long address);
diff --git a/mm/internal.h b/mm/internal.h
index fdddbc83ac5f..c1488a3ee957 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -11,6 +11,7 @@
#ifndef __MM_INTERNAL_H
#define __MM_INTERNAL_H
+#include <linux/fs.h>
#include <linux/mm.h>
void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
@@ -21,6 +22,20 @@ static inline void set_page_count(struct page *page, int v)
atomic_set(&page->_count, v);
}
+extern int __do_page_cache_readahead(struct address_space *mapping,
+ struct file *filp, pgoff_t offset, unsigned long nr_to_read,
+ unsigned long lookahead_size);
+
+/*
+ * Submit IO for the read-ahead request in file_ra_state.
+ */
+static inline unsigned long ra_submit(struct file_ra_state *ra,
+ struct address_space *mapping, struct file *filp)
+{
+ return __do_page_cache_readahead(mapping, filp,
+ ra->start, ra->size, ra->async_size);
+}
+
/*
* Turn a non-refcounted page (->_count == 0) into refcounted with
* a count of one.
diff --git a/mm/readahead.c b/mm/readahead.c
index 4ab0c93bc2b3..0f35e983bffb 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -8,9 +8,7 @@
*/
#include <linux/kernel.h>
-#include <linux/fs.h>
#include <linux/gfp.h>
-#include <linux/mm.h>
#include <linux/export.h>
#include <linux/blkdev.h>
#include <linux/backing-dev.h>
@@ -20,6 +18,8 @@
#include <linux/syscalls.h>
#include <linux/file.h>
+#include "internal.h"
+
/*
* Initialise a struct file's readahead state. Assumes that the caller has
* memset *ra to zero.
@@ -149,8 +149,7 @@ out:
*
* Returns the number of pages requested, or the maximum amount of I/O allowed.
*/
-static int
-__do_page_cache_readahead(struct address_space *mapping, struct file *filp,
+int __do_page_cache_readahead(struct address_space *mapping, struct file *filp,
pgoff_t offset, unsigned long nr_to_read,
unsigned long lookahead_size)
{
@@ -248,20 +247,6 @@ unsigned long max_sane_readahead(unsigned long nr)
}
/*
- * Submit IO for the read-ahead request in file_ra_state.
- */
-unsigned long ra_submit(struct file_ra_state *ra,
- struct address_space *mapping, struct file *filp)
-{
- int actual;
-
- actual = __do_page_cache_readahead(mapping, filp,
- ra->start, ra->size, ra->async_size);
-
- return actual;
-}
-
-/*
* Set the initial window size, round to next power of 2 and square
* for small size, x 4 for medium, and x 2 for large
* for 128k (32 page) max ra
--
2.1.0
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