From 35f6f753b79705bc4b62da5dcc218d75ffa88370 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Fri, 6 Apr 2007 21:18:06 +0200 Subject: [PATCH] [PATCH] sched: get rid of p->children use in show_task() the p->parent PID printout gives us all the information about the task tree that we need - the eldest_child()/older_sibling()/ younger_sibling() printouts are mostly historic and i do not remember ever having used those fields. (IMO in fact they confuse the SysRq-T output.) So remove them. This code has sentimental value though, those fields and printouts are one of the oldest ones still surviving from Linux v0.95's kernel/sched.c: if (p->p_ysptr || p->p_osptr) printk(" Younger sib=%d, older sib=%d\n\r", p->p_ysptr ? p->p_ysptr->pid : -1, p->p_osptr ? p->p_osptr->pid : -1); else printk("\n\r"); written 15 years ago, in early 1992. Signed-off-by: Ingo Molnar Signed-off-by: Linus 'snif' Torvalds --- kernel/sched.c | 35 +---------------------------------- 1 file changed, 1 insertion(+), 34 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index a4ca632c477..cdad3b04242 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -4687,27 +4687,6 @@ out_unlock: return retval; } -static inline struct task_struct *eldest_child(struct task_struct *p) -{ - if (list_empty(&p->children)) - return NULL; - return list_entry(p->children.next,struct task_struct,sibling); -} - -static inline struct task_struct *older_sibling(struct task_struct *p) -{ - if (p->sibling.prev==&p->parent->children) - return NULL; - return list_entry(p->sibling.prev,struct task_struct,sibling); -} - -static inline struct task_struct *younger_sibling(struct task_struct *p) -{ - if (p->sibling.next==&p->parent->children) - return NULL; - return list_entry(p->sibling.next,struct task_struct,sibling); -} - static const char stat_nam[] = "RSDTtZX"; static void show_task(struct task_struct *p) @@ -4738,19 +4717,7 @@ static void show_task(struct task_struct *p) free = (unsigned long)n - (unsigned long)end_of_stack(p); } #endif - printk("%5lu %5d %6d ", free, p->pid, p->parent->pid); - if ((relative = eldest_child(p))) - printk("%5d ", relative->pid); - else - printk(" "); - if ((relative = younger_sibling(p))) - printk("%7d", relative->pid); - else - printk(" "); - if ((relative = older_sibling(p))) - printk(" %5d", relative->pid); - else - printk(" "); + printk("%5lu %5d %6d", free, p->pid, p->parent->pid); if (!p->mm) printk(" (L-TLB)\n"); else -- 2.20.1