diff --git a/mm/nommu.c b/mm/nommu.c
index ee3e789..8cee8c8 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -416,7 +416,7 @@
  *  to a regular file.  in this case, the unmapping will need
  *  to invoke file system routines that need the global lock.
  */
-asmlinkage long sys_brk(unsigned long brk)
+SYSCALL_DEFINE1(brk, unsigned long, brk)
 {
 	struct mm_struct *mm = current->mm;
 
@@ -1573,7 +1573,7 @@
 }
 EXPORT_SYMBOL(do_munmap);
 
-asmlinkage long sys_munmap(unsigned long addr, size_t len)
+SYSCALL_DEFINE2(munmap, unsigned long, addr, size_t, len)
 {
 	int ret;
 	struct mm_struct *mm = current->mm;
@@ -1657,10 +1657,9 @@
 }
 EXPORT_SYMBOL(do_mremap);
 
-asmlinkage
-unsigned long sys_mremap(unsigned long addr,
-			 unsigned long old_len, unsigned long new_len,
-			 unsigned long flags, unsigned long new_addr)
+SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len,
+		unsigned long, new_len, unsigned long, flags,
+		unsigned long, new_addr)
 {
 	unsigned long ret;