linux-kernel - [PATCH 29/53] sched/headers: Move debugging functions from <linux/sched.h> to <linux/sched/debug.h>

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Date:   Wed,  8 Feb 2017 19:45:00 +0100
From:   Ingo Molnar <mingo@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mike Galbraith <efault@....de>,
        Oleg Nesterov <oleg@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 29/53] sched/headers: Move debugging functions from <linux/sched.h> to <linux/sched/debug.h>

Collect the various scheduler and task state debugging APIs scattered
around <linux/sched.h> into the new <linux/sched/debug.h> header.

In particular the show_regs() and show_stack() prototype affects many files,
update them.

Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Mike Galbraith <efault@....de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/linux/sched.h       | 36 ------------------------------------
 include/linux/sched/debug.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 36 deletions(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index c83424b1e1ac..ebba1eaeacf8 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -46,15 +46,9 @@ struct nameidata;
 struct signal_struct;
 struct sighand_struct;
 
-extern void dump_cpu_task(int cpu);
-
 struct seq_file;
 struct cfs_rq;
 struct task_group;
-#ifdef CONFIG_SCHED_DEBUG
-extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
-extern void proc_sched_set_task(struct task_struct *p);
-#endif
 
 /*
  * Task state bitmask. NOTE! These bits are also
@@ -196,25 +190,6 @@ extern cpumask_var_t cpu_isolated_map;
 
 extern int runqueue_is_locked(int cpu);
 
-/*
- * Only dump TASK_* tasks. (0 for all tasks)
- */
-extern void show_state_filter(unsigned long state_filter);
-
-static inline void show_state(void)
-{
-	show_state_filter(0);
-}
-
-extern void show_regs(struct pt_regs *);
-
-/*
- * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
- * task), SP is the stack pointer of the first frame that should be shown in the back
- * trace (or NULL if the entire call-chain of the task should be shown).
- */
-extern void show_stack(struct task_struct *task, unsigned long *sp);
-
 extern void cpu_init (void);
 extern void trap_init(void);
 extern void update_process_times(int user);
@@ -229,17 +204,6 @@ extern int sched_cpu_dying(unsigned int cpu);
 # define sched_cpu_dying	NULL
 #endif
 
-extern void sched_show_task(struct task_struct *p);
-
-/* Attach to any functions which should be ignored in wchan output. */
-#define __sched		__attribute__((__section__(".sched.text")))
-
-/* Linker adds these: start and end of __sched functions */
-extern char __sched_text_start[], __sched_text_end[];
-
-/* Is this address in the __sched functions? */
-extern int in_sched_functions(unsigned long addr);
-
 #define	MAX_SCHEDULE_TIMEOUT	LONG_MAX
 extern signed long schedule_timeout(signed long timeout);
 extern signed long schedule_timeout_interruptible(signed long timeout);
diff --git a/include/linux/sched/debug.h b/include/linux/sched/debug.h
index 55bc0cd35fd5..853bbef0b47b 100644
--- a/include/linux/sched/debug.h
+++ b/include/linux/sched/debug.h
@@ -3,4 +3,50 @@
 
 #include <linux/sched.h>
 
+/*
+ * Various scheduler/task debugging interfaces:
+ */
+
+struct task_struct;
+
+extern void dump_cpu_task(int cpu);
+
+/*
+ * Only dump TASK_* tasks. (0 for all tasks)
+ */
+extern void show_state_filter(unsigned long state_filter);
+
+static inline void show_state(void)
+{
+	show_state_filter(0);
+}
+
+struct pt_regs;
+
+extern void show_regs(struct pt_regs *);
+
+/*
+ * TASK is a pointer to the task whose backtrace we want to see (or NULL for current
+ * task), SP is the stack pointer of the first frame that should be shown in the back
+ * trace (or NULL if the entire call-chain of the task should be shown).
+ */
+extern void show_stack(struct task_struct *task, unsigned long *sp);
+
+extern void sched_show_task(struct task_struct *p);
+
+#ifdef CONFIG_SCHED_DEBUG
+struct seq_file;
+extern void proc_sched_show_task(struct task_struct *p, struct seq_file *m);
+extern void proc_sched_set_task(struct task_struct *p);
+#endif
+
+/* Attach to any functions which should be ignored in wchan output. */
+#define __sched		__attribute__((__section__(".sched.text")))
+
+/* Linker adds these: start and end of __sched functions */
+extern char __sched_text_start[], __sched_text_end[];
+
+/* Is this address in the __sched functions? */
+extern int in_sched_functions(unsigned long addr);
+
 #endif /* _LINUX_SCHED_DEBUG_H */
-- 
2.7.4