mark kmem_free / kmem_realloc argument as const

Index: linux-2.6-xfs/fs/xfs/linux-2.6/kmem.h
===================================================================
@@ -57,8 +57,8 @@ kmem_flags_convert(unsigned int __nocast
 extern void *kmem_alloc(size_t, unsigned int __nocast);
 extern void *kmem_zalloc(size_t, unsigned int __nocast);
 extern void *kmem_zalloc_greedy(size_t *, size_t, size_t, unsigned int __nocast);
-extern void *kmem_realloc(void *, size_t, size_t, unsigned int __nocast);
-extern void  kmem_free(void *);
+extern void *kmem_realloc(const void *, size_t, size_t, unsigned int __nocast);
+extern void  kmem_free(const void *);
 
 /*
  * Zone interfaces

Index: linux-2.6-xfs/fs/xfs/linux-2.6/kmem.c
===================================================================
@@ -90,7 +90,7 @@ kmem_zalloc_greedy(size_t *size, size_t 
 }
 
 void
-kmem_free(void *ptr)
+kmem_free(const void *ptr)
 {
 	if (((unsigned long)ptr < VMALLOC_START) ||
 	    ((unsigned long)ptr >= VMALLOC_END)) {

@@ -101,7 +101,7 @@ kmem_free(void *ptr)
 }
 
 void *
-kmem_realloc(void *ptr, size_t newsize, size_t oldsize,
+kmem_realloc(const void *ptr, size_t newsize, size_t oldsize,
 	     unsigned int __nocast flags)
 {
 	void	*new;