[PATCH v4 05/57] x86/dumpstack: make printk_stack_address() more generally useful

From: Josh Poimboeuf
Date: Thu Aug 18 2016 - 09:17:15 EST


Change printk_stack_address() to be useful when called by an unwinder
outside the context of dump_trace().

Specifically:

- printk_stack_address()'s 'data' argument is always used as the log
level string. Make that explicit.

- Call touch_nmi_watchdog().

Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
arch/x86/kernel/dumpstack.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 5f49c04..6b3376d 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -26,10 +26,11 @@ int kstack_depth_to_print = 3 * STACKSLOTS_PER_LINE;
static int die_counter;

static void printk_stack_address(unsigned long address, int reliable,
- void *data)
+ char *log_lvl)
{
+ touch_nmi_watchdog();
printk("%s [<%p>] %s%pB\n",
- (char *)data, (void *)address, reliable ? "" : "? ",
+ log_lvl, (void *)address, reliable ? "" : "? ",
(void *)address);
}

@@ -163,7 +164,6 @@ static int print_trace_stack(void *data, char *name)
*/
static int print_trace_address(void *data, unsigned long addr, int reliable)
{
- touch_nmi_watchdog();
printk_stack_address(addr, reliable, data);
return 0;
}
--
2.7.4