[PATCH 2/2] x86: traps_xx: modify x86_64 to use _log_lvl variants

[PATCH 2/2] x86: traps_xx: modify x86_64 to use _log_lvl variants

[Alexander van Heukelum]

i386 has show_trace_log_lvl and show_stack_log_lvl, allowing
traces to be emitted with log-level annotations. This patch
introduces them to x86_64, but log_lvl is only ever set to
an empty string. Output of traces is unchanged.

i386-chunk is whitespace-only.

Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
---
 arch/x86/kernel/traps_32.c |    2 +-
 arch/x86/kernel/traps_64.c |   24 ++++++++++++++++--------
 2 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/traps_32.c b/arch/x86/kernel/traps_32.c
index 51cccde..c971dce 100644
--- a/arch/x86/kernel/traps_32.c
+++ b/arch/x86/kernel/traps_32.c
@@ -256,7 +256,7 @@ static const struct stacktrace_ops print_trace_ops = {
 
 static void
 show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
-		   unsigned long *stack, unsigned long bp, char *log_lvl)
+		unsigned long *stack, unsigned long bp, char *log_lvl)
 {
 	dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
 	printk("%s =======================\n", log_lvl);
diff --git a/arch/x86/kernel/traps_64.c b/arch/x86/kernel/traps_64.c
index 58b1619..a998cef 100644
--- a/arch/x86/kernel/traps_64.c
+++ b/arch/x86/kernel/traps_64.c
@@ -378,17 +378,24 @@ static const struct stacktrace_ops print_trace_ops = {
 	.address = print_trace_address,
 };
 
-void show_trace(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *stack, unsigned long bp)
+static void
+show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp, char *log_lvl)
 {
 	printk("\nCall Trace:\n");
-	dump_trace(task, regs, stack, bp, &print_trace_ops, NULL);
+	dump_trace(task, regs, stack, bp, &print_trace_ops, log_lvl);
 	printk("\n");
 }
 
+void show_trace(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *stack, unsigned long bp)
+{
+	show_trace_log_lvl(task, regs, stack, bp, "");
+}
+
 static void
-_show_stack(struct task_struct *task, struct pt_regs *regs,
-		unsigned long *sp, unsigned long bp)
+show_stack_log_lvl(struct task_struct *task, struct pt_regs *regs,
+		unsigned long *sp, unsigned long bp, char *log_lvl)
 {
 	unsigned long *stack;
 	int i;
@@ -422,12 +429,12 @@ _show_stack(struct task_struct *task, struct pt_regs *regs,
 		printk(" %016lx", *stack++);
 		touch_nmi_watchdog();
 	}
-	show_trace(task, regs, sp, bp);
+	show_trace_log_lvl(task, regs, sp, bp, log_lvl);
 }
 
 void show_stack(struct task_struct *task, unsigned long *sp)
 {
-	_show_stack(task, NULL, sp, 0);
+	show_stack_log_lvl(task, NULL, sp, 0, "");
 }
 
 /*
@@ -477,7 +484,8 @@ void show_registers(struct pt_regs *regs)
 		u8 *ip;
 
 		printk("Stack: ");
-		_show_stack(NULL, regs, (unsigned long *)sp, regs->bp);
+		show_stack_log_lvl(NULL, regs, (unsigned long *)sp,
+				regs->bp, "");
 		printk("\n");
 
 		printk(KERN_EMERG "Code: ");
-- 
1.5.4.3

Re: [PATCH 2/2] x86: traps_xx: modify x86_64 to use _log_lvl variants

[Ingo Molnar]

* Alexander van Heukelum <heukelum@mailshack.com> wrote:

> i386 has show_trace_log_lvl and show_stack_log_lvl, allowing traces to 
> be emitted with log-level annotations. This patch introduces them to 
> x86_64, but log_lvl is only ever set to an empty string. Output of 
> traces is unchanged.
> 
> i386-chunk is whitespace-only.

applied to tip/x86/core, thanks Alexander.

	Ingo