[PATCH] sched: print fields name when do sched_show_task

[Libing Zhou]

Current sysrq(t) output task fields name are not aligned with
actual task fields value, e.g.:

        kernel: sysrq: SysRq : Show State
        kernel:  task                        PC stack   pid father
        kernel: systemd         S12456     1      0 0x00000000
        kernel: Call Trace:
        kernel: ? __schedule+0x240/0x740

To make it more readable, print fields name together with task fields
value in same line, remove separate fields name print.

Signed-off-by: Libing Zhou <libing.z...@nokia-sbell.com>
---
 kernel/sched/core.c | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index e15543cb8481..0ad554cb0bbb 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6069,10 +6069,10 @@ void sched_show_task(struct task_struct *p)
        if (!try_get_task_stack(p))
                return;
 
-       printk(KERN_INFO "%-15.15s %c", p->comm, task_state_to_char(p));
+       pr_info("task:%-15.15s state:%c", p->comm, task_state_to_char(p));
 
        if (p->state == TASK_RUNNING)
-               printk(KERN_CONT "  running task    ");
+               pr_cont("  running task    ");
 #ifdef CONFIG_DEBUG_STACK_USAGE
        free = stack_not_used(p);
 #endif
@@ -6081,8 +6081,8 @@ void sched_show_task(struct task_struct *p)
        if (pid_alive(p))
                ppid = task_pid_nr(rcu_dereference(p->real_parent));
        rcu_read_unlock();
-       printk(KERN_CONT "%5lu %5d %6d 0x%08lx\n", free,
-               task_pid_nr(p), ppid,
+       pr_cont(" stack:%5lu pid:%5d ppid:%6d flags:0x%08lx\n",
+               free, task_pid_nr(p), ppid,
                (unsigned long)task_thread_info(p)->flags);
 
        print_worker_info(KERN_INFO, p);
@@ -6117,13 +6117,6 @@ void show_state_filter(unsigned long state_filter)
 {
        struct task_struct *g, *p;
 
-#if BITS_PER_LONG == 32
-       printk(KERN_INFO
-               "  task                PC stack   pid father\n");
-#else
-       printk(KERN_INFO
-               "  task                        PC stack   pid father\n");
-#endif
        rcu_read_lock();
        for_each_process_thread(g, p) {
                /*
-- 
2.22.0