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-rw-r--r--kernel/tracepoint.c26
1 files changed, 11 insertions, 15 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 33cbd8c203f8..3490407dc7b7 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -492,33 +492,29 @@ static int sys_tracepoint_refcount;
void syscall_regfunc(void)
{
- unsigned long flags;
- struct task_struct *g, *t;
+ struct task_struct *p, *t;
if (!sys_tracepoint_refcount) {
- read_lock_irqsave(&tasklist_lock, flags);
- do_each_thread(g, t) {
- /* Skip kernel threads. */
- if (t->mm)
- set_tsk_thread_flag(t, TIF_SYSCALL_TRACEPOINT);
- } while_each_thread(g, t);
- read_unlock_irqrestore(&tasklist_lock, flags);
+ read_lock(&tasklist_lock);
+ for_each_process_thread(p, t) {
+ set_tsk_thread_flag(t, TIF_SYSCALL_TRACEPOINT);
+ }
+ read_unlock(&tasklist_lock);
}
sys_tracepoint_refcount++;
}
void syscall_unregfunc(void)
{
- unsigned long flags;
- struct task_struct *g, *t;
+ struct task_struct *p, *t;
sys_tracepoint_refcount--;
if (!sys_tracepoint_refcount) {
- read_lock_irqsave(&tasklist_lock, flags);
- do_each_thread(g, t) {
+ read_lock(&tasklist_lock);
+ for_each_process_thread(p, t) {
clear_tsk_thread_flag(t, TIF_SYSCALL_TRACEPOINT);
- } while_each_thread(g, t);
- read_unlock_irqrestore(&tasklist_lock, flags);
+ }
+ read_unlock(&tasklist_lock);
}
}
#endif