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Date: Fri, 16 Oct 2009 01:41:01 +0100 (BST)
From: Hugh Dickins <hugh.dickins@...cali.co.uk>
To: Andrew Morton <akpm@...ux-foundation.org>
cc: Rafael Wysocki <rjw@...k.pl>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH 4/9 v2] swap_info: miscellaneous minor cleanups
Move CONFIG_HIBERNATION's swapdev_block() into the main CONFIG_HIBERNATION
block, remove extraneous whitespace and return, fix typo in a comment.
Signed-off-by: Hugh Dickins <hugh.dickins@...cali.co.uk>
---
v2 fixes mistaken description above, thank you KAMEZAWA-san.
mm/swapfile.c | 51 ++++++++++++++++++++++--------------------------
1 file changed, 24 insertions(+), 27 deletions(-)
--- si3/mm/swapfile.c 2009-10-14 21:26:22.000000000 +0100
+++ si4/mm/swapfile.c 2009-10-14 21:26:32.000000000 +0100
@@ -519,9 +519,9 @@ swp_entry_t get_swap_page_of_type(int ty
return (swp_entry_t) {0};
}
-static struct swap_info_struct * swap_info_get(swp_entry_t entry)
+static struct swap_info_struct *swap_info_get(swp_entry_t entry)
{
- struct swap_info_struct * p;
+ struct swap_info_struct *p;
unsigned long offset, type;
if (!entry.val)
@@ -599,7 +599,7 @@ static int swap_entry_free(struct swap_i
*/
void swap_free(swp_entry_t entry)
{
- struct swap_info_struct * p;
+ struct swap_info_struct *p;
p = swap_info_get(entry);
if (p) {
@@ -629,7 +629,6 @@ void swapcache_free(swp_entry_t entry, s
}
spin_unlock(&swap_lock);
}
- return;
}
/*
@@ -783,6 +782,21 @@ int swap_type_of(dev_t device, sector_t
}
/*
+ * Get the (PAGE_SIZE) block corresponding to given offset on the swapdev
+ * corresponding to given index in swap_info (swap type).
+ */
+sector_t swapdev_block(int type, pgoff_t offset)
+{
+ struct block_device *bdev;
+
+ if ((unsigned int)type >= nr_swapfiles)
+ return 0;
+ if (!(swap_info[type]->flags & SWP_WRITEOK))
+ return 0;
+ return map_swap_page(swp_entry(type, offset), &bdev);
+}
+
+/*
* Return either the total number of swap pages of given type, or the number
* of free pages of that type (depending on @free)
*
@@ -805,7 +819,7 @@ unsigned int count_swap_pages(int type,
spin_unlock(&swap_lock);
return n;
}
-#endif
+#endif /* CONFIG_HIBERNATION */
/*
* No need to decide whether this PTE shares the swap entry with others,
@@ -1317,23 +1331,6 @@ sector_t map_swap_page(swp_entry_t entry
}
}
-#ifdef CONFIG_HIBERNATION
-/*
- * Get the (PAGE_SIZE) block corresponding to given offset on the swapdev
- * corresponding to given index in swap_info (swap type).
- */
-sector_t swapdev_block(int type, pgoff_t offset)
-{
- struct block_device *bdev;
-
- if ((unsigned int)type >= nr_swapfiles)
- return 0;
- if (!(swap_info[type]->flags & SWP_WRITEOK))
- return 0;
- return map_swap_page(swp_entry(type, offset), &bdev);
-}
-#endif /* CONFIG_HIBERNATION */
-
/*
* Free all of a swapdev's extent information
*/
@@ -1525,12 +1522,12 @@ bad_bmap:
SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
{
- struct swap_info_struct * p = NULL;
+ struct swap_info_struct *p = NULL;
unsigned short *swap_map;
struct file *swap_file, *victim;
struct address_space *mapping;
struct inode *inode;
- char * pathname;
+ char *pathname;
int i, type, prev;
int err;
@@ -1782,7 +1779,7 @@ late_initcall(max_swapfiles_check);
*/
SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
{
- struct swap_info_struct * p;
+ struct swap_info_struct *p;
char *name = NULL;
struct block_device *bdev = NULL;
struct file *swap_file = NULL;
@@ -2117,7 +2114,7 @@ void si_swapinfo(struct sysinfo *val)
*/
static int __swap_duplicate(swp_entry_t entry, bool cache)
{
- struct swap_info_struct * p;
+ struct swap_info_struct *p;
unsigned long offset, type;
int result = -EINVAL;
int count;
@@ -2186,7 +2183,7 @@ void swap_duplicate(swp_entry_t entry)
/*
* @entry: swap entry for which we allocate swap cache.
*
- * Called when allocating swap cache for exising swap entry,
+ * Called when allocating swap cache for existing swap entry,
* This can return error codes. Returns 0 at success.
* -EBUSY means there is a swap cache.
* Note: return code is different from swap_duplicate().
--
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