[PATCH] reduce casting in sysenter.c

Ran across this because it's another place where an unsigned long is passed
directly to __pa().  Making the "page" variable a void* seems a bit more
natural than an unsigned long and reduces the net number of casts by 1. 
Without it, we probably need another (void *) cast in the __pa() call.  

For more explanation as to why this was probably done originally, see this
post: http://marc.theaimsgroup.com/?l=linux-mm&m=109155379124628&w=2Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/i386/kernel/sysenter.c

@@ -43,18 +43,18 @@ extern const char vsyscall_sysenter_start, vsyscall_sysenter_end;
 
 static int __init sysenter_setup(void)
 {
-	unsigned long page = get_zeroed_page(GFP_ATOMIC);
+	void *page = (void *)get_zeroed_page(GFP_ATOMIC);
 
 	__set_fixmap(FIX_VSYSCALL, __pa(page), PAGE_READONLY_EXEC);
 
 	if (!boot_cpu_has(X86_FEATURE_SEP)) {
-		memcpy((void *) page,
+		memcpy(page,
 		       &vsyscall_int80_start,
 		       &vsyscall_int80_end - &vsyscall_int80_start);
 		return 0;
 	}
 
-	memcpy((void *) page,
+	memcpy(page,
 	       &vsyscall_sysenter_start,
 	       &vsyscall_sysenter_end - &vsyscall_sysenter_start);