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[PATCH] mm: fix swap unused warning 

If CONFIG_SWAP is not defined we get:

mm/vmscan.c: In function ‘remove_mapping’:
mm/vmscan.c:387: warning: unused variable ‘swap’

Convert defines in swap.h into blank inline functions to fix this warning
and be consistent.

Signed-off-by: Con Kolivas <kernel@kolivas.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Con Kolivas 2006-06-23 02:03:42 -07:00 committed by Linus Torvalds
parent 30c253e6da
commit bd96b9eb7c
1 changed files with 53 additions and 11 deletions
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64
include/linux/swap.h
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@ -282,18 +282,60 @@ static inline void disable_swap_token(void)
#define free_pages_and_swap_cache(pages, nr) \
release_pages((pages), (nr), 0);
#define show_swap_cache_info() /*NOTHING*/
#define free_swap_and_cache(swp) /*NOTHING*/
#define swap_duplicate(swp) /*NOTHING*/
#define swap_free(swp) /*NOTHING*/
#define read_swap_cache_async(swp,vma,addr) NULL
#define lookup_swap_cache(swp) NULL
#define valid_swaphandles(swp, off) 0
static inline void show_swap_cache_info(void)
{
}
static inline void free_swap_and_cache(swp_entry_t swp)
{
}
static inline int swap_duplicate(swp_entry_t swp)
{
return 0;
}
static inline void swap_free(swp_entry_t swp)
{
}
static inline struct page *read_swap_cache_async(swp_entry_t swp,
struct vm_area_struct *vma, unsigned long addr)
{
return NULL;
}
static inline struct page *lookup_swap_cache(swp_entry_t swp)
{
return NULL;
}
static inline int valid_swaphandles(swp_entry_t entry, unsigned long *offset)
{
return 0;
}
#define can_share_swap_page(p) (page_mapcount(p) == 1)
#define move_to_swap_cache(p, swp) 1
#define move_from_swap_cache(p, i, m) 1
#define __delete_from_swap_cache(p) /*NOTHING*/
#define delete_from_swap_cache(p) /*NOTHING*/
static inline int move_to_swap_cache(struct page *page, swp_entry_t entry)
{
return 1;
}
static inline int move_from_swap_cache(struct page *page, unsigned long index,
struct address_space *mapping)
{
return 1;
}
static inline void __delete_from_swap_cache(struct page *page)
{
}
static inline void delete_from_swap_cache(struct page *page)
{
}
#define swap_token_default_timeout 0
static inline int remove_exclusive_swap_page(struct page *p)