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commit e3e89cc535223433a619d0969db3fa05cdd946b8
("Mark ptrace_{traceme,attach,detach} static")

--- b/include/linux/ptrace.h
+++ a/include/linux/ptrace.h
@@ -102,8 +102,11 @@
 extern long arch_ptrace(struct task_struct *child, long request,
 			unsigned long addr, unsigned long data);
+extern int ptrace_traceme(void);
 extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len);
 extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len);
+extern int ptrace_attach(struct task_struct *tsk);
+extern int ptrace_detach(struct task_struct *, unsigned int);
 extern void ptrace_disable(struct task_struct *);
 extern int ptrace_check_attach(struct task_struct *task, int kill);
 extern int ptrace_request(struct task_struct *child, long request,
--- b/kernel/ptrace.c
+++ a/kernel/ptrace.c
@@ -163,7 +163,7 @@
 	return !err;
+int ptrace_attach(struct task_struct *task)
-static int ptrace_attach(struct task_struct *task)
 	int retval;
@@ -219,7 +219,7 @@
  * Performs checks and sets PT_PTRACED.
  * Should be used by all ptrace implementations for PTRACE_TRACEME.
+int ptrace_traceme(void)
-static int ptrace_traceme(void)
 	int ret = -EPERM;
@@ -293,7 +293,7 @@
 	return false;
+int ptrace_detach(struct task_struct *child, unsigned int data)
-static int ptrace_detach(struct task_struct *child, unsigned int data)
 	bool dead = false;