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sched/core: Remove unused prefetch_stack()

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prefetch_stack() is defined by IA64, but not actually used anywhere anymore.

Remove it.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2017-02-05 12:11:03 +01:00
parent b68070e146
commit 2c873d55cd
3 changed files with 0 additions and 31 deletions
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2
arch/ia64/include/asm/processor.h
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@ -19,8 +19,6 @@
#include <asm/ptrace.h>
#include <asm/ustack.h>
#define ARCH_HAS_PREFETCH_SWITCH_STACK
#define IA64_NUM_PHYS_STACK_REG 96
#define IA64_NUM_DBG_REGS 8

23
arch/ia64/kernel/entry.S
View File

@ -455,29 +455,6 @@ GLOBAL_ENTRY(load_switch_stack)
br.cond.sptk.many b7
END(load_switch_stack)
GLOBAL_ENTRY(prefetch_stack)
add r14 = -IA64_SWITCH_STACK_SIZE, sp
add r15 = IA64_TASK_THREAD_KSP_OFFSET, in0
;;
ld8 r16 = [r15] // load next's stack pointer
lfetch.fault.excl [r14], 128
;;
lfetch.fault.excl [r14], 128
lfetch.fault [r16], 128
;;
lfetch.fault.excl [r14], 128
lfetch.fault [r16], 128
;;
lfetch.fault.excl [r14], 128
lfetch.fault [r16], 128
;;
lfetch.fault.excl [r14], 128
lfetch.fault [r16], 128
;;
lfetch.fault [r16], 128
br.ret.sptk.many rp
END(prefetch_stack)
/*
* Invoke a system call, but do some tracing before and after the call.
* We MUST preserve the current register frame throughout this routine

6
include/linux/sched.h
View File

@ -247,12 +247,6 @@ struct sched_info {
# define SCHED_FIXEDPOINT_SHIFT 10
# define SCHED_FIXEDPOINT_SCALE (1L << SCHED_FIXEDPOINT_SHIFT)
#ifdef ARCH_HAS_PREFETCH_SWITCH_STACK
extern void prefetch_stack(struct task_struct *t);
#else
static inline void prefetch_stack(struct task_struct *t) { }
#endif
struct load_weight {
unsigned long weight;
u32 inv_weight;