backported vs2.1.x fix to irq handling, which caused incorrect scheduler behavior

[linux-2.6.git] / fs / proc / array.c

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 715194f..ded4833 100644 (file)
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -76,8 +76,6 @@
 #include <linux/tracehook.h>
 #include <linux/rcupdate.h>
 #include <linux/delayacct.h>
-#include <linux/vs_context.h>
-#include <linux/vs_network.h>
 
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
@@ -408,6 +406,8 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
        sigemptyset(&sigign);
        sigemptyset(&sigcatch);
        cutime = cstime = utime = stime = cputime_zero;
+
+       mutex_lock(&tty_mutex);
        read_lock(&tasklist_lock);
        if (task->sighand) {
                spin_lock_irq(&task->sighand->siglock);
@@ -453,6 +453,7 @@ static int do_task_stat(struct task_struct *task, char * buffer, int whole)
        pgid = vx_info_map_pid(task->vx_info, pgid);
 
        read_unlock(&tasklist_lock);
+       mutex_unlock(&tty_mutex);
 
        if (!whole || num_threads<2) {
                wchan = 0;