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Date: Thu, 15 Oct 2009 11:19:24 +0900
From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To: Hugh Dickins <hugh.dickins@...cali.co.uk>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Rafael Wysocki <rjw@...k.pl>, linux-kernel@...r.kernel.org,
linux-mm@...ck.org
Subject: Re: [PATCH 4/9] swap_info: miscellaneous minor cleanups
On Thu, 15 Oct 2009 01:50:54 +0100 (BST)
Hugh Dickins <hugh.dickins@...cali.co.uk> wrote:
> Move CONFIG_MIGRATION's swapdev_block() into the main CONFIG_MIGRATION
> block, remove extraneous whitespace and return, fix typo in a comment.
>
CONFIG_HIBERNATION ?
> Signed-off-by: Hugh Dickins <hugh.dickins@...cali.co.uk>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
> ---
>
> 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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