Use '#ifdef' to test for CONFIG_xxx variables, instead of

depending on undefined preprocessor symbols evaluating to zero.

Make panic.c use proper function prototypes.

arch/i386/mm/pgtable.c

@@ -141,7 +141,7 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
 {
 	struct page *pte;
 
-#if CONFIG_HIGHPTE
+#ifdef CONFIG_HIGHPTE
 	pte = alloc_pages(GFP_KERNEL|__GFP_HIGHMEM|__GFP_REPEAT, 0);
 #else
 	pte = alloc_pages(GFP_KERNEL|__GFP_REPEAT, 0);
@@ -151,7 +151,7 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
 	return pte;
 }
 
-#if CONFIG_X86_PAE
+#ifdef CONFIG_X86_PAE
 
 pgd_t *pgd_alloc(struct mm_struct *mm)
 {

include/linux/nfs_fs_sb.h

@@ -27,7 +27,7 @@ struct nfs_server {
 	char *			hostname;	/* remote hostname */
 	struct nfs_fh		fh;
 	struct sockaddr_in	addr;
-#if CONFIG_NFS_V4
+#ifdef CONFIG_NFS_V4
 	/* Our own IP address, as a null-terminated string.
 	 * This is used to generate the clientid, and the callback address.
 	 */

kernel/panic.c

@@ -110,7 +110,7 @@ NORET_TYPE void panic(const char * fmt, ...)
  *	The string is overwritten by the next call to print_taint().
  */
  
-const char *print_tainted()
+const char *print_tainted(void)
 {
 	static char buf[20];
 	if (tainted) {