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arch: remove unused macro/function thread_saved_pc()

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The only user of thread_saved_pc() in non-arch-specific code was removed
in commit 8243d55977 ("sched/core: Remove pointless printout in
sched_show_task()").  Remove the implementations as well.

Some architectures use thread_saved_pc() in their arch-specific code.
Leave their thread_saved_pc() intact.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tobias Klauser
2017-06-28 15:30:02 +02:00
committed by Linus Torvalds
parent e547204f1f
commit 6474924e2b
41 changed files with 0 additions and 270 deletions
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25
arch/s390/kernel/process.c
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@@ -41,31 +41,6 @@
asmlinkage void ret_from_fork(void) asm ("ret_from_fork");
/*
* Return saved PC of a blocked thread. used in kernel/sched.
* resume in entry.S does not create a new stack frame, it
* just stores the registers %r6-%r15 to the frame given by
* schedule. We want to return the address of the caller of
* schedule, so we have to walk the backchain one time to
* find the frame schedule() store its return address.
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
struct stack_frame *sf, *low, *high;
if (!tsk || !task_stack_page(tsk))
return 0;
low = task_stack_page(tsk);
high = (struct stack_frame *) task_pt_regs(tsk);
sf = (struct stack_frame *) tsk->thread.ksp;
if (sf <= low || sf > high)
return 0;
sf = (struct stack_frame *) sf->back_chain;
if (sf <= low || sf > high)
return 0;
return sf->gprs[8];
}
extern void kernel_thread_starter(void);
/*