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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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arc/include/asm/processor.h
View File

@ -86,8 +86,6 @@ struct task_struct;
#define TSK_K_BLINK(tsk) TSK_K_REG(tsk, 4)
#define TSK_K_FP(tsk) TSK_K_REG(tsk, 0)
#define thread_saved_pc(tsk) TSK_K_BLINK(tsk)
extern void start_thread(struct pt_regs * regs, unsigned long pc,
unsigned long usp);

5
arch/blackfin/include/asm/processor.h
View File

@ -75,11 +75,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/*
* Return saved PC of a blocked thread.
*/
#define thread_saved_pc(tsk) (tsk->thread.pc)
unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) \

5
arch/c6x/include/asm/processor.h
View File

@ -95,11 +95,6 @@ static inline void release_thread(struct task_struct *dead_task)
#define copy_segments(tsk, mm) do { } while (0)
#define release_segments(mm) do { } while (0)
/*
* saved PC of a blocked thread.
*/
#define thread_saved_pc(tsk) (task_pt_regs(tsk)->pc)
/*
* saved kernel SP and DP of a blocked thread.
*/

8
arch/cris/arch-v10/kernel/process.c
View File

@ -69,14 +69,6 @@ void hard_reset_now (void)
while(1) /* waiting for RETRIBUTION! */ ;
}
/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *t)
{
return task_pt_regs(t)->irp;
}
/* setup the child's kernel stack with a pt_regs and switch_stack on it.
* it will be un-nested during _resume and _ret_from_sys_call when the
* new thread is scheduled.

8
arch/cris/arch-v32/kernel/process.c
View File

@ -84,14 +84,6 @@ hard_reset_now(void)
; /* Wait for reset. */
}
/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *t)
{
return task_pt_regs(t)->erp;
}
/*
* Setup the child's kernel stack with a pt_regs and call switch_stack() on it.
* It will be unnested during _resume and _ret_from_sys_call when the new thread

2
arch/cris/include/asm/processor.h
View File

@ -52,8 +52,6 @@ unsigned long get_wchan(struct task_struct *p);
#define KSTK_ESP(tsk) ((tsk) == current ? rdusp() : (tsk)->thread.usp)
extern unsigned long thread_saved_pc(struct task_struct *tsk);
/* Free all resources held by a thread. */
static inline void release_thread(struct task_struct *dead_task)
{

5
arch/frv/include/asm/processor.h
View File

@ -96,11 +96,6 @@ extern asmlinkage void *restore_user_regs(const struct user_context *target, ...
#define release_segments(mm) do { } while (0)
#define forget_segments() do { } while (0)
/*
* Return saved PC of a blocked thread.
*/
extern unsigned long thread_saved_pc(struct task_struct *tsk);
unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) ((tsk)->thread.frame0->pc)

9
arch/frv/kernel/process.c
View File

@ -198,15 +198,6 @@ unsigned long get_wchan(struct task_struct *p)
return 0;
}
unsigned long thread_saved_pc(struct task_struct *tsk)
{
/* Check whether the thread is blocked in resume() */
if (in_sched_functions(tsk->thread.pc))
return ((unsigned long *)tsk->thread.fp)[2];
else
return tsk->thread.pc;
}
int elf_check_arch(const struct elf32_hdr *hdr)
{
unsigned long hsr0 = __get_HSR(0);

4
arch/h8300/include/asm/processor.h
View File

@ -110,10 +110,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *tsk);
unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) \

5
arch/h8300/kernel/process.c
View File

@ -129,11 +129,6 @@ int copy_thread(unsigned long clone_flags,
return 0;
}
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return ((struct pt_regs *)tsk->thread.esp0)->pc;
}
unsigned long get_wchan(struct task_struct *p)
{
unsigned long fp, pc;

3
arch/hexagon/include/asm/processor.h
View File

@ -33,9 +33,6 @@
/* task_struct, defined elsewhere, is the "process descriptor" */
struct task_struct;
/* this is defined in arch/process.c */
extern unsigned long thread_saved_pc(struct task_struct *tsk);
extern void start_thread(struct pt_regs *, unsigned long, unsigned long);
/*

8
arch/hexagon/kernel/process.c
View File

@ -60,14 +60,6 @@ void arch_cpu_idle(void)
local_irq_enable();
}
/*
* Return saved PC of a blocked thread
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return 0;
}
/*
* Copy architecture-specific thread state
*/

17
arch/ia64/include/asm/processor.h
View File

@ -601,23 +601,6 @@ ia64_set_unat (__u64 *unat, void *spill_addr, unsigned long nat)
*unat = (*unat & ~mask) | (nat << bit);
}
/*
* Return saved PC of a blocked thread.
* Note that the only way T can block is through a call to schedule() -> switch_to().
*/
static inline unsigned long
thread_saved_pc (struct task_struct *t)
{
struct unw_frame_info info;
unsigned long ip;
unw_init_from_blocked_task(&info, t);
if (unw_unwind(&info) < 0)
return 0;
unw_get_ip(&info, &ip);
return ip;
}
/*
* Get the current instruction/program counter value.
*/

2
arch/m32r/include/asm/processor.h
View File

@ -122,8 +122,6 @@ extern void release_thread(struct task_struct *);
extern void copy_segments(struct task_struct *p, struct mm_struct * mm);
extern void release_segments(struct mm_struct * mm);
extern unsigned long thread_saved_pc(struct task_struct *);
/* Copy and release all segment info associated with a VM */
#define copy_segments(p, mm) do { } while (0)
#define release_segments(mm) do { } while (0)

8
arch/m32r/kernel/process.c
View File

@ -39,14 +39,6 @@
#include <linux/err.h>
/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return tsk->thread.lr;
}
void (*pm_power_off)(void) = NULL;
EXPORT_SYMBOL(pm_power_off);

2
arch/m68k/include/asm/processor.h
View File

@ -130,8 +130,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
extern unsigned long thread_saved_pc(struct task_struct *tsk);
unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) \

14
arch/m68k/kernel/process.c
View File

@ -40,20 +40,6 @@
asmlinkage void ret_from_fork(void);
asmlinkage void ret_from_kernel_thread(void);
/*
* Return saved PC from a blocked thread
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
struct switch_stack *sw = (struct switch_stack *)tsk->thread.ksp;
/* Check whether the thread is blocked in resume() */
if (in_sched_functions(sw->retpc))
return ((unsigned long *)sw->a6)[1];
else
return sw->retpc;
}
void arch_cpu_idle(void)
{
#if defined(MACH_ATARI_ONLY)

6
arch/microblaze/include/asm/processor.h
View File

@ -69,8 +69,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
extern unsigned long thread_saved_pc(struct task_struct *t);
extern unsigned long get_wchan(struct task_struct *p);
# define KSTK_EIP(tsk) (0)
@ -121,10 +119,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/* Return saved (kernel) PC of a blocked thread. */
# define thread_saved_pc(tsk) \
((tsk)->thread.regs ? (tsk)->thread.regs->r15 : 0)
unsigned long get_wchan(struct task_struct *p);
/* The size allocated for kernel stacks. This _must_ be a power of two! */

17
arch/microblaze/kernel/process.c
View File

@ -119,23 +119,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
return 0;
}
#ifndef CONFIG_MMU
/*
* Return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
struct cpu_context *ctx =
&(((struct thread_info *)(tsk->stack))->cpu_context);
/* Check whether the thread is blocked in resume() */
if (in_sched_functions(ctx->r15))
return (unsigned long)ctx->r15;
else
return ctx->r14;
}
#endif
unsigned long get_wchan(struct task_struct *p)
{
/* TBD (used by procfs) */

5
arch/mn10300/include/asm/processor.h
View File

@ -132,11 +132,6 @@ static inline void start_thread(struct pt_regs *regs,
/* Free all resources held by a thread. */
extern void release_thread(struct task_struct *);
/*
* Return saved PC of a blocked thread.
*/
extern unsigned long thread_saved_pc(struct task_struct *tsk);
unsigned long get_wchan(struct task_struct *p);
#define task_pt_regs(task) ((task)->thread.uregs)

8
arch/mn10300/kernel/process.c
View File

@ -39,14 +39,6 @@
#include <asm/gdb-stub.h>
#include "internal.h"
/*
* return saved PC of a blocked thread.
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return ((unsigned long *) tsk->thread.sp)[3];
}
/*
* power off function, if any
*/

3
arch/nios2/include/asm/processor.h
View File

@ -75,9 +75,6 @@ static inline void release_thread(struct task_struct *dead_task)
{
}
/* Return saved PC of a blocked thread. */
#define thread_saved_pc(tsk) ((tsk)->thread.kregs->ea)
extern unsigned long get_wchan(struct task_struct *p);
#define task_pt_regs(p) \

5
arch/openrisc/include/asm/processor.h
View File

@ -84,11 +84,6 @@ void start_thread(struct pt_regs *regs, unsigned long nip, unsigned long sp);
void release_thread(struct task_struct *);
unsigned long get_wchan(struct task_struct *p);
/*
* Return saved PC of a blocked thread. For now, this is the "user" PC
*/
extern unsigned long thread_saved_pc(struct task_struct *t);
#define init_stack (init_thread_union.stack)
#define cpu_relax() barrier()

5
arch/openrisc/kernel/process.c
View File

@ -110,11 +110,6 @@ void show_regs(struct pt_regs *regs)
show_registers(regs);
}
unsigned long thread_saved_pc(struct task_struct *t)
{
return (unsigned long)user_regs(t->stack)->pc;
}
void release_thread(struct task_struct *dead_task)
{
}

5
arch/parisc/include/asm/processor.h
View File

@ -163,12 +163,7 @@ struct thread_struct {
.flags = 0 \
}
/*
* Return saved PC of a blocked thread. This is used by ps mostly.
*/
struct task_struct;
unsigned long thread_saved_pc(struct task_struct *t);
void show_trace(struct task_struct *task, unsigned long *stack);
/*

5
arch/parisc/kernel/process.c
View File

@ -239,11 +239,6 @@ copy_thread(unsigned long clone_flags, unsigned long usp,
return 0;
}
unsigned long thread_saved_pc(struct task_struct *t)
{
return t->thread.regs.kpc;
}
unsigned long
get_wchan(struct task_struct *p)
{

6
arch/powerpc/include/asm/processor.h
View File

@ -378,12 +378,6 @@ struct thread_struct {
}
#endif
/*
* Return saved PC of a blocked thread. For now, this is the "user" PC
*/
#define thread_saved_pc(tsk) \
((tsk)->thread.regs? (tsk)->thread.regs->nip: 0)
#define task_pt_regs(tsk) ((struct pt_regs *)(tsk)->thread.regs)
unsigned long get_wchan(struct task_struct *p);

5
arch/s390/include/asm/processor.h
View File

@ -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)

25
arch/s390/kernel/process.c
View File

@ -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);
/*

1
arch/score/include/asm/processor.h
View File

@ -13,7 +13,6 @@ struct task_struct;
*/
extern void (*cpu_wait)(void);
extern unsigned long thread_saved_pc(struct task_struct *tsk);
extern void start_thread(struct pt_regs *regs,
unsigned long pc, unsigned long sp);
extern unsigned long get_wchan(struct task_struct *p);

5
arch/score/kernel/process.c
View File

@ -101,11 +101,6 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *r)
return 1;
}
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return task_pt_regs(tsk)->cp0_epc;
}
unsigned long get_wchan(struct task_struct *task)
{
if (!task || task == current || task->state == TASK_RUNNING)

3
arch/sparc/include/asm/processor_32.h
View File

@ -67,9 +67,6 @@ struct thread_struct {
.current_ds = KERNEL_DS, \
}
/* Return saved PC of a blocked thread. */
unsigned long thread_saved_pc(struct task_struct *t);
/* Do necessary setup to start up a newly executed thread. */
static inline void start_thread(struct pt_regs * regs, unsigned long pc,
unsigned long sp)

2
arch/sparc/include/asm/processor_64.h
View File

@ -89,9 +89,7 @@ struct thread_struct {
#include <linux/types.h>
#include <asm/fpumacro.h>
/* Return saved PC of a blocked thread. */
struct task_struct;
unsigned long thread_saved_pc(struct task_struct *);
/* On Uniprocessor, even in RMO processes see TSO semantics */
#ifdef CONFIG_SMP

8
arch/sparc/kernel/process_32.c
View File

@ -176,14 +176,6 @@ void show_stack(struct task_struct *tsk, unsigned long *_ksp)
printk("\n");
}
/*
* Note: sparc64 has a pretty intricated thread_saved_pc, check it out.
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
return task_thread_info(tsk)->kpc;
}
/*
* Free current thread data structures etc..
*/

19
arch/sparc/kernel/process_64.c
View File

@ -400,25 +400,6 @@ core_initcall(sparc_sysrq_init);
#endif
unsigned long thread_saved_pc(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
unsigned long ret = 0xdeadbeefUL;
if (ti && ti->ksp) {
unsigned long *sp;
sp = (unsigned long *)(ti->ksp + STACK_BIAS);
if (((unsigned long)sp & (sizeof(long) - 1)) == 0UL &&
sp[14]) {
unsigned long *fp;
fp = (unsigned long *)(sp[14] + STACK_BIAS);
if (((unsigned long)fp & (sizeof(long) - 1)) == 0UL)
ret = fp[15];
}
}
return ret;
}
/* Free current thread data structures etc.. */
void exit_thread(struct task_struct *tsk)
{

7
arch/tile/include/asm/processor.h
View File

@ -214,13 +214,6 @@ static inline void release_thread(struct task_struct *dead_task)
extern void prepare_exit_to_usermode(struct pt_regs *regs, u32 flags);
/*
* Return saved (kernel) PC of a blocked thread.
* Only used in a printk() in kernel/sched/core.c, so don't work too hard.
*/
#define thread_saved_pc(t) ((t)->thread.pc)
unsigned long get_wchan(struct task_struct *p);
/* Return initial ksp value for given task. */

2
arch/um/include/asm/processor-generic.h
View File

@ -58,8 +58,6 @@ static inline void release_thread(struct task_struct *task)
{
}
extern unsigned long thread_saved_pc(struct task_struct *t);
static inline void mm_copy_segments(struct mm_struct *from_mm,
struct mm_struct *new_mm)
{

6
arch/um/kernel/um_arch.c
View File

@ -56,12 +56,6 @@ union thread_union cpu0_irqstack
__attribute__((__section__(".data..init_irqstack"))) =
{ INIT_THREAD_INFO(init_task) };
unsigned long thread_saved_pc(struct task_struct *task)
{
/* FIXME: Need to look up userspace_pid by cpu */
return os_process_pc(userspace_pid[0]);
}
/* Changed in setup_arch, which is called in early boot */
static char host_info[(__NEW_UTS_LEN + 1) * 5];

2
arch/x86/include/asm/processor.h
View File

@ -860,8 +860,6 @@ extern unsigned long KSTK_ESP(struct task_struct *task);
#endif /* CONFIG_X86_64 */
extern unsigned long thread_saved_pc(struct task_struct *tsk);
extern void start_thread(struct pt_regs *regs, unsigned long new_ip,
unsigned long new_sp);

11
arch/x86/kernel/process.c
View File

@ -544,17 +544,6 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
return randomize_page(mm->brk, 0x02000000);
}
/*
* Return saved PC of a blocked thread.
* What is this good for? it will be always the scheduler or ret_from_fork.
*/
unsigned long thread_saved_pc(struct task_struct *tsk)
{
struct inactive_task_frame *frame =
(struct inactive_task_frame *) READ_ONCE(tsk->thread.sp);
return READ_ONCE_NOCHECK(frame->ret_addr);
}
/*
* Called from fs/proc with a reference on @p to find the function
* which called into schedule(). This needs to be done carefully

2
arch/xtensa/include/asm/processor.h
View File

@ -213,8 +213,6 @@ struct mm_struct;
#define release_segments(mm) do { } while(0)
#define forget_segments() do { } while (0)
#define thread_saved_pc(tsk) (task_pt_regs(tsk)->pc)
extern unsigned long get_wchan(struct task_struct *p);
#define KSTK_EIP(tsk) (task_pt_regs(tsk)->pc)