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authorTobias Klauser <tklauser@distanz.ch>2017-06-28 15:30:02 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2017-06-28 16:13:57 -0700
commit6474924e2b5ddb0030c355558966adcbe3b49022 (patch)
treec217bdbd7999bd6a9d45e220a5f6efdd828f8df3 /arch/s390
parente547204f1f4f314a7352f7b93332fdc1a2e4b24c (diff)
downloadop-kernel-dev-6474924e2b5ddb0030c355558966adcbe3b49022.zip
op-kernel-dev-6474924e2b5ddb0030c355558966adcbe3b49022.tar.gz
arch: remove unused macro/function thread_saved_pc()
The only user of thread_saved_pc() in non-arch-specific code was removed in commit 8243d5597793 ("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>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/include/asm/processor.h5
-rw-r--r--arch/s390/kernel/process.c25
2 files changed, 0 insertions, 30 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h
index 60d395f..aeac013 100644
--- a/arch/s390/include/asm/processor.h
+++ b/arch/s390/include/asm/processor.h
@@ -221,11 +221,6 @@ extern void release_thread(struct task_struct *);
/* Free guarded storage control block for current */
void exit_thread_gs(void);
-/*
- * Return saved PC of a blocked thread.
- */
-extern unsigned long thread_saved_pc(struct task_struct *t);
-
unsigned long get_wchan(struct task_struct *p);
#define task_pt_regs(tsk) ((struct pt_regs *) \
(task_stack_page(tsk) + THREAD_SIZE) - 1)
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 999d715..bb32b86 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -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);
/*
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