From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/arch/x86/include/asm/preempt.h | 36 +-----------------------------------
1 files changed, 1 insertions(+), 35 deletions(-)
diff --git a/kernel/arch/x86/include/asm/preempt.h b/kernel/arch/x86/include/asm/preempt.h
index afe37a8..a334dd0 100644
--- a/kernel/arch/x86/include/asm/preempt.h
+++ b/kernel/arch/x86/include/asm/preempt.h
@@ -89,24 +89,9 @@
* a decrement which hits zero means we have no preempt_count and should
* reschedule.
*/
-static __always_inline bool ____preempt_count_dec_and_test(void)
-{
- return GEN_UNARY_RMWcc("decl", __preempt_count, e, __percpu_arg([var]));
-}
-
static __always_inline bool __preempt_count_dec_and_test(void)
{
- if (____preempt_count_dec_and_test())
- return true;
-#ifdef CONFIG_PREEMPT_LAZY
- if (preempt_count())
- return false;
- if (current_thread_info()->preempt_lazy_count)
- return false;
- return test_thread_flag(TIF_NEED_RESCHED_LAZY);
-#else
- return false;
-#endif
+ return GEN_UNARY_RMWcc("decl", __preempt_count, e, __percpu_arg([var]));
}
/*
@@ -114,29 +99,10 @@
*/
static __always_inline bool should_resched(int preempt_offset)
{
-#ifdef CONFIG_PREEMPT_LAZY
- u32 tmp;
- tmp = raw_cpu_read_4(__preempt_count);
- if (tmp == preempt_offset)
- return true;
-
- /* preempt count == 0 ? */
- tmp &= ~PREEMPT_NEED_RESCHED;
- if (tmp != preempt_offset)
- return false;
- /* XXX PREEMPT_LOCK_OFFSET */
- if (current_thread_info()->preempt_lazy_count)
- return false;
- return test_thread_flag(TIF_NEED_RESCHED_LAZY);
-#else
return unlikely(raw_cpu_read_4(__preempt_count) == preempt_offset);
-#endif
}
#ifdef CONFIG_PREEMPTION
-#ifdef CONFIG_PREEMPT_RT
- extern void preempt_schedule_lock(void);
-#endif
extern asmlinkage void preempt_schedule_thunk(void);
# define __preempt_schedule() \
asm volatile ("call preempt_schedule_thunk" : ASM_CALL_CONSTRAINT)
--
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