The ia64 function "thread_matches()" has no users since commit e868a55c2a8c ("[IA64] remove find_thread_for_addr()"). Remove it. This allows us to make ptrace_check_attach() static to kernel/ptrace.c, which is good since we'll need to change the semantics of it and fix up all the callers.
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| @@ -45,7 +45,6 @@ extern long arch_ptrace(struct task_struct *child, long request, · 44 unmodified lines | ||
| 45 | 45 | extern int ptrace_readdata(struct task_struct *tsk, unsigned long src, char __user *dst, int len); |
| 46 | 46 | extern int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long dst, int len); |
| 47 | 47 | extern void ptrace_disable(struct task_struct *); |
| 48 | −extern int ptrace_check_attach(struct task_struct *task, bool ignore_state); | |
| 49 | 48 | extern int ptrace_request(struct task_struct *child, long request, |
| 50 | 49 | unsigned long addr, unsigned long data); |
| 51 | 50 | extern void ptrace_notify(int exit_code); |