linux-kernel - [RFC PATCH 24/86] Revert "sched: Harden PREEMPT

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Date:   Tue,  7 Nov 2023 13:57:10 -0800
From:   Ankur Arora <ankur.a.arora@...cle.com>
To:     linux-kernel@...r.kernel.org
Cc:     tglx@...utronix.de, peterz@...radead.org,
        torvalds@...ux-foundation.org, paulmck@...nel.org,
        linux-mm@...ck.org, x86@...nel.org, akpm@...ux-foundation.org,
        luto@...nel.org, bp@...en8.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, mingo@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, willy@...radead.org, mgorman@...e.de,
        jon.grimm@....com, bharata@....com, raghavendra.kt@....com,
        boris.ostrovsky@...cle.com, konrad.wilk@...cle.com,
        jgross@...e.com, andrew.cooper3@...rix.com, mingo@...nel.org,
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        krypton@...ich-teichert.org, rostedt@...dmis.org,
        David.Laight@...LAB.COM, richard@....at, mjguzik@...il.com,
        Ankur Arora <ankur.a.arora@...cle.com>
Subject: [RFC PATCH 24/86] Revert "sched: Harden PREEMPT_DYNAMIC"

This reverts commit ef72661e28c64ad610f89acc2832ec67b27ba438.

Signed-off-by: Ankur Arora <ankur.a.arora@...cle.com>
---
 arch/x86/include/asm/preempt.h | 4 ++--
 include/linux/kernel.h         | 2 +-
 include/linux/sched.h          | 2 +-
 kernel/sched/core.c            | 8 ++++----
 4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/preempt.h b/arch/x86/include/asm/preempt.h
index 49d2f0396be4..967879366d27 100644
--- a/arch/x86/include/asm/preempt.h
+++ b/arch/x86/include/asm/preempt.h
@@ -115,7 +115,7 @@ DECLARE_STATIC_CALL(preempt_schedule, __preempt_schedule_func);
 
 #define __preempt_schedule() \
 do { \
-	__STATIC_CALL_MOD_ADDRESSABLE(preempt_schedule); \
+	__ADDRESSABLE(STATIC_CALL_KEY(preempt_schedule)); \
 	asm volatile ("call " STATIC_CALL_TRAMP_STR(preempt_schedule) : ASM_CALL_CONSTRAINT); \
 } while (0)
 
@@ -128,7 +128,7 @@ DECLARE_STATIC_CALL(preempt_schedule_notrace, __preempt_schedule_notrace_func);
 
 #define __preempt_schedule_notrace() \
 do { \
-	__STATIC_CALL_MOD_ADDRESSABLE(preempt_schedule_notrace); \
+	__ADDRESSABLE(STATIC_CALL_KEY(preempt_schedule_notrace)); \
 	asm volatile ("call " STATIC_CALL_TRAMP_STR(preempt_schedule_notrace) : ASM_CALL_CONSTRAINT); \
 } while (0)
 
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index b9121007fd0b..5f99720d0cca 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -109,7 +109,7 @@ DECLARE_STATIC_CALL(might_resched, __cond_resched);
 
 static __always_inline void might_resched(void)
 {
-	static_call_mod(might_resched)();
+	static_call(might_resched)();
 }
 
 #else
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 66f520954de5..2b1f3008c90e 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -2090,7 +2090,7 @@ DECLARE_STATIC_CALL(cond_resched, __cond_resched);
 
 static __always_inline int _cond_resched(void)
 {
-	return static_call_mod(cond_resched)();
+	return static_call(cond_resched)();
 }
 
 #else
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index bbd19b8ff3e9..7ea22244c540 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6893,7 +6893,7 @@ EXPORT_SYMBOL(preempt_schedule);
 
 #ifdef CONFIG_PREEMPT_DYNAMIC
 DEFINE_STATIC_CALL(preempt_schedule, __preempt_schedule_func);
-EXPORT_STATIC_CALL_TRAMP(preempt_schedule);
+EXPORT_STATIC_CALL(preempt_schedule);
 #endif
 
 
@@ -6951,7 +6951,7 @@ EXPORT_SYMBOL_GPL(preempt_schedule_notrace);
 
 #ifdef CONFIG_PREEMPT_DYNAMIC
 DEFINE_STATIC_CALL(preempt_schedule_notrace, __preempt_schedule_notrace_func);
-EXPORT_STATIC_CALL_TRAMP(preempt_schedule_notrace);
+EXPORT_STATIC_CALL(preempt_schedule_notrace);
 #endif
 
 #endif /* CONFIG_PREEMPTION */
@@ -8740,10 +8740,10 @@ EXPORT_SYMBOL(__cond_resched);
 
 #ifdef CONFIG_PREEMPT_DYNAMIC
 DEFINE_STATIC_CALL_RET0(cond_resched, __cond_resched);
-EXPORT_STATIC_CALL_TRAMP(cond_resched);
+EXPORT_STATIC_CALL(cond_resched);
 
 DEFINE_STATIC_CALL_RET0(might_resched, __cond_resched);
-EXPORT_STATIC_CALL_TRAMP(might_resched);
+EXPORT_STATIC_CALL(might_resched);
 #endif
 
 /*
-- 
2.31.1