[PATCH] hrtimers: remove it_real_value calculation from proc/*/stat

Remove the it_real_value from /proc/*/stat, during 1.2.x was the last time it
returned useful data (as it was directly maintained by the scheduler), now
it's only a waste of time to calculate it.  Return 0 instead.

Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 7eb1bd7..7a76ad5 100644 (file)
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -330,7 +330,6 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
        unsigned long  min_flt = 0,  maj_flt = 0;
        cputime_t cutime, cstime, utime, stime;
        unsigned long rsslim = 0;
-       DEFINE_KTIME(it_real_value);
        struct task_struct *t;
        char tcomm[sizeof(task->comm)];
 
@@ -386,7 +385,6 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
                        utime = cputime_add(utime, task->signal->utime);
                        stime = cputime_add(stime, task->signal->stime);
                }
-               it_real_value = task->signal->real_timer.expires;
        }
        ppid = pid_alive(task) ? task->group_leader->real_parent->tgid : 0;
        read_unlock(&tasklist_lock);
@@ -413,7 +411,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
        start_time = nsec_to_clock_t(start_time);
 
        res = sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
-%lu %lu %lu %lu %lu %ld %ld %ld %ld %d %ld %llu %lu %ld %lu %lu %lu %lu %lu \
+%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu\n",
                task->pid,
                tcomm,
@@ -435,7 +433,6 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
                priority,
                nice,
                num_threads,
-               (long) ktime_to_clock_t(it_real_value),
                start_time,
                vsize,
                mm ? get_mm_rss(mm) : 0,