linux-kernel - [patch 3/8] sched: Remove preempt_offset argument from __might

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Date:   Thu, 23 Sep 2021 18:54:38 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Paul McKenney <paulmck@...ux.vnet.ibm.com>,
        Sebastian Siewior <bigeasy@...utronix.de>
Subject: [patch 3/8] sched: Remove preempt_offset argument from __might_sleep()

All callers hand in 0 and never will hand in anything else.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 include/linux/kernel.h |    7 +++----
 kernel/sched/core.c    |    4 ++--
 mm/memory.c            |    2 +-
 3 files changed, 6 insertions(+), 7 deletions(-)

--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -112,7 +112,7 @@ static __always_inline void might_resche
 
 #ifdef CONFIG_DEBUG_ATOMIC_SLEEP
 extern void __might_resched(const char *file, int line, int preempt_offset);
-extern void __might_sleep(const char *file, int line, int preempt_offset);
+extern void __might_sleep(const char *file, int line);
 extern void __cant_sleep(const char *file, int line, int preempt_offset);
 extern void __cant_migrate(const char *file, int line);
 
@@ -129,7 +129,7 @@ extern void __cant_migrate(const char *f
  * supposed to.
  */
 # define might_sleep() \
-	do { __might_sleep(__FILE__, __LINE__, 0); might_resched(); } while (0)
+	do { __might_sleep(__FILE__, __LINE__); might_resched(); } while (0)
 /**
  * cant_sleep - annotation for functions that cannot sleep
  *
@@ -170,8 +170,7 @@ extern void __cant_migrate(const char *f
 #else
   static inline void __might_resched(const char *file, int line,
 				     int preempt_offset) { }
-  static inline void __might_sleep(const char *file, int line,
-				   int preempt_offset) { }
+static inline void __might_sleep(const char *file, int line) { }
 # define might_sleep() do { might_resched(); } while (0)
 # define cant_sleep() do { } while (0)
 # define cant_migrate()		do { } while (0)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -9432,7 +9432,7 @@ static inline int preempt_count_equals(i
 	return (nested == preempt_offset);
 }
 
-void __might_sleep(const char *file, int line, int preempt_offset)
+void __might_sleep(const char *file, int line)
 {
 	unsigned int state = get_current_state();
 	/*
@@ -9446,7 +9446,7 @@ void __might_sleep(const char *file, int
 			(void *)current->task_state_change,
 			(void *)current->task_state_change);
 
-	__might_resched(file, line, preempt_offset);
+	__might_resched(file, line, 0);
 }
 EXPORT_SYMBOL(__might_sleep);
 
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -5255,7 +5255,7 @@ void __might_fault(const char *file, int
 		return;
 	if (pagefault_disabled())
 		return;
-	__might_sleep(file, line, 0);
+	__might_sleep(file, line);
 #if defined(CONFIG_DEBUG_ATOMIC_SLEEP)
 	if (current->mm)
 		might_lock_read(&current->mm->mmap_lock);