Index: sys/sys/stack.h
===================================================================
--- sys/sys/stack.h	(wersja 226179)
+++ sys/sys/stack.h	(kopia robocza)
@@ -37,16 +37,17 @@
 struct stack	*stack_create(void);
 void		 stack_destroy(struct stack *);
 int		 stack_put(struct stack *, vm_offset_t);
-void		 stack_copy(struct stack *, struct stack *);
+void		 stack_copy(const struct stack *, struct stack *);
 void		 stack_zero(struct stack *);
-void		 stack_print(struct stack *);
-void		 stack_print_ddb(struct stack *);
-void		 stack_print_short(struct stack *);
-void		 stack_print_short_ddb(struct stack *);
-void		 stack_sbuf_print(struct sbuf *, struct stack *);
-void		 stack_sbuf_print_ddb(struct sbuf *, struct stack *);
+void		 stack_print(const struct stack *);
+void		 stack_print_ddb(const struct stack *);
+void		 stack_print_short(const struct stack *);
+void		 stack_print_short_ddb(const struct stack *);
+void		 stack_sbuf_print(struct sbuf *, const struct stack *);
+void		 stack_sbuf_print_ddb(struct sbuf *, const struct stack *);
 #ifdef KTR
-void		 stack_ktr(u_int, const char *, int, struct stack *, u_int, int);
+void		 stack_ktr(u_int, const char *, int, const struct stack *,
+		    u_int, int);
 #define	CTRSTACK(m, st, depth, cheap) do {				\
 	if (KTR_COMPILE & (m))						\
 		stack_ktr((m), __FILE__, __LINE__, st, depth, cheap);	\
Index: sys/kern/subr_stack.c
===================================================================
--- sys/kern/subr_stack.c	(wersja 226230)
+++ sys/kern/subr_stack.c	(kopia robocza)
@@ -77,7 +77,7 @@
 }
 
 void
-stack_copy(struct stack *src, struct stack *dst)
+stack_copy(const struct stack *src, struct stack *dst)
 {
 
 	*dst = *src;
@@ -91,7 +91,7 @@
 }
 
 void
-stack_print(struct stack *st)
+stack_print(const struct stack *st)
 {
 	char namebuf[64];
 	long offset;
@@ -107,7 +107,7 @@
 }
 
 void
-stack_print_short(struct stack *st)
+stack_print_short(const struct stack *st)
 {
 	char namebuf[64];
 	long offset;
@@ -127,7 +127,7 @@
 }
 
 void
-stack_print_ddb(struct stack *st)
+stack_print_ddb(const struct stack *st)
 {
 	const char *name;
 	long offset;
@@ -143,7 +143,7 @@
 
 #ifdef DDB
 void
-stack_print_short_ddb(struct stack *st)
+stack_print_short_ddb(const struct stack *st)
 {
 	const char *name;
 	long offset;
@@ -167,7 +167,7 @@
  * other for use in the live kernel.
  */
 void
-stack_sbuf_print(struct sbuf *sb, struct stack *st)
+stack_sbuf_print(struct sbuf *sb, const struct stack *st)
 {
 	char namebuf[64];
 	long offset;
@@ -184,7 +184,7 @@
 
 #ifdef DDB
 void
-stack_sbuf_print_ddb(struct sbuf *sb, struct stack *st)
+stack_sbuf_print_ddb(struct sbuf *sb, const struct stack *st)
 {
 	const char *name;
 	long offset;
@@ -201,8 +201,8 @@
 
 #ifdef KTR
 void
-stack_ktr(u_int mask, const char *file, int line, struct stack *st, u_int depth,
-    int cheap)
+stack_ktr(u_int mask, const char *file, int line, const struct stack *st,
+    u_int depth, int cheap)
 {
 #ifdef DDB
 	const char *name;