By making some macros reference their parameters.
Get rid of compile-time warnings:
mm/vmscan.c: In function `remove_mapping':
mm/vmscan.c:382: warning: unused variable `swap'
It's used, but not without CONFIG_SWAP.
Signed-off-by: David Brownell <[email protected]>
Index: at91-pre2/include/linux/swap.h
===================================================================
--- at91-pre2.orig/include/linux/swap.h 2006-05-15 10:07:26.000000000 -0700
+++ at91-pre2/include/linux/swap.h 2006-05-15 11:21:50.000000000 -0700
@@ -290,9 +290,9 @@ static inline void disable_swap_token(vo
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 free_swap_and_cache(swp) ((void)(swp)/*NOP*/)
+#define swap_duplicate(swp) ((void)(swp)/*NOP*/)
+#define swap_free(swp) ((void)(swp)/*NOP*/)
#define read_swap_cache_async(swp,vma,addr) NULL
#define lookup_swap_cache(swp) NULL
#define valid_swaphandles(swp, off) 0
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