[PATCH RESEND] printk: add tgid and comm in dump_stack_print_info

[liuhailong]

Some threads'name of android is the same in different process.
So we need to get the tgid and the comm of thread's group_leader.

Signed-off-by: Liu Hailong <liuhailong5@xxxxxxxxxx>
Signed-off-by: Li Pengcheng <lipengcheng8@xxxxxxxxxx>
Signed-off-by: Chen Feng <puck.chen@xxxxxxxxxxxxx>
---
 kernel/printk/printk.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index bfbf284..84246b3 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -3166,6 +3166,9 @@ void dump_stack_print_info(const char *log_lvl)
 	       (int)strcspn(init_utsname()->version, " "),
 	       init_utsname()->version);
 
+	printk("TGID: %d Comm: %.20s\n",
+	       current->tgid, current->group_leader->comm);
+
 	if (dump_stack_arch_desc_str[0] != '\0')
 		printk("%sHardware name: %s\n",
 		       log_lvl, dump_stack_arch_desc_str);
-- 
1.8.3.2