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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@tiscali.co.uk> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Rik van Riel <riel@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -519,9 +519,9 @@ swp_entry_t get_swap_page_of_type(int type)
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return (swp_entry_t) {0};
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}
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static struct swap_info_struct * swap_info_get(swp_entry_t entry)
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static struct swap_info_struct *swap_info_get(swp_entry_t entry)
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{
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struct swap_info_struct * p;
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struct swap_info_struct *p;
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unsigned long offset, type;
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if (!entry.val)
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@ -599,7 +599,7 @@ static int swap_entry_free(struct swap_info_struct *p,
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*/
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void swap_free(swp_entry_t entry)
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{
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struct swap_info_struct * p;
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struct swap_info_struct *p;
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p = swap_info_get(entry);
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if (p) {
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@ -629,7 +629,6 @@ void swapcache_free(swp_entry_t entry, struct page *page)
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}
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spin_unlock(&swap_lock);
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}
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return;
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}
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/*
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@ -782,6 +781,21 @@ int swap_type_of(dev_t device, sector_t offset, struct block_device **bdev_p)
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return -ENODEV;
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}
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/*
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* Get the (PAGE_SIZE) block corresponding to given offset on the swapdev
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* corresponding to given index in swap_info (swap type).
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*/
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sector_t swapdev_block(int type, pgoff_t offset)
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{
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struct block_device *bdev;
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if ((unsigned int)type >= nr_swapfiles)
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return 0;
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if (!(swap_info[type]->flags & SWP_WRITEOK))
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return 0;
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return map_swap_page(swp_entry(type, offset), &bdev);
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}
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/*
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* Return either the total number of swap pages of given type, or the number
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* of free pages of that type (depending on @free)
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@ -805,7 +819,7 @@ unsigned int count_swap_pages(int type, int free)
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spin_unlock(&swap_lock);
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return n;
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}
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#endif
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#endif /* CONFIG_HIBERNATION */
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/*
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* No need to decide whether this PTE shares the swap entry with others,
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@ -1316,23 +1330,6 @@ sector_t map_swap_page(swp_entry_t entry, struct block_device **bdev)
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}
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}
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#ifdef CONFIG_HIBERNATION
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/*
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* Get the (PAGE_SIZE) block corresponding to given offset on the swapdev
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* corresponding to given index in swap_info (swap type).
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*/
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sector_t swapdev_block(int type, pgoff_t offset)
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{
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struct block_device *bdev;
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if ((unsigned int)type >= nr_swapfiles)
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return 0;
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if (!(swap_info[type]->flags & SWP_WRITEOK))
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return 0;
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return map_swap_page(swp_entry(type, offset), &bdev);
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}
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#endif /* CONFIG_HIBERNATION */
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/*
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* Free all of a swapdev's extent information
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*/
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@ -1523,12 +1520,12 @@ bad_bmap:
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SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
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{
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struct swap_info_struct * p = NULL;
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struct swap_info_struct *p = NULL;
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unsigned short *swap_map;
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struct file *swap_file, *victim;
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struct address_space *mapping;
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struct inode *inode;
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char * pathname;
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char *pathname;
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int i, type, prev;
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int err;
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@ -1780,7 +1777,7 @@ late_initcall(max_swapfiles_check);
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*/
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SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
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{
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struct swap_info_struct * p;
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struct swap_info_struct *p;
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char *name = NULL;
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struct block_device *bdev = NULL;
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struct file *swap_file = NULL;
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@ -2116,7 +2113,7 @@ void si_swapinfo(struct sysinfo *val)
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*/
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static int __swap_duplicate(swp_entry_t entry, bool cache)
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{
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struct swap_info_struct * p;
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struct swap_info_struct *p;
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unsigned long offset, type;
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int result = -EINVAL;
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int count;
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@ -2185,7 +2182,7 @@ void swap_duplicate(swp_entry_t entry)
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/*
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* @entry: swap entry for which we allocate swap cache.
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*
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* Called when allocating swap cache for exising swap entry,
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* Called when allocating swap cache for existing swap entry,
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* This can return error codes. Returns 0 at success.
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* -EBUSY means there is a swap cache.
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* Note: return code is different from swap_duplicate().
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