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authorFrederic Weisbecker <fweisbec@gmail.com>2008-11-23 18:43:39 +0100
committerIngo Molnar <mingo@elte.hu>2008-11-23 22:34:02 +0100
commit65afa5e603d507014580ead016ec887b49e1afa6 (patch)
tree0ee309e4193e90587b2febda09143891e0591cdc
parenteae849ca034c7f1015f0a6f17421ebc737f0a069 (diff)
downloadlinux-65afa5e603d507014580ead016ec887b49e1afa6.tar.bz2
tracing/function-return-tracer: free the return stack on free_task()
Impact: avoid losing some traces when a task is freed do_exit() is not the last function called when a task finishes. There are still some functions which are to be called such as ree_task(). So we delay the freeing of the return stack to the last moment. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--kernel/exit.c2
-rw-r--r--kernel/fork.c1
2 files changed, 1 insertions, 2 deletions
diff --git a/kernel/exit.c b/kernel/exit.c
index ef04d03b3286..e5ae36ebe8af 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -47,7 +47,6 @@
#include <linux/task_io_accounting_ops.h>
#include <linux/tracehook.h>
#include <trace/sched.h>
-#include <linux/ftrace.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -1128,7 +1127,6 @@ NORET_TYPE void do_exit(long code)
preempt_disable();
/* causes final put_task_struct in finish_task_switch(). */
tsk->state = TASK_DEAD;
- ftrace_retfunc_exit_task(tsk);
schedule();
BUG();
/* Avoid "noreturn function does return". */
diff --git a/kernel/fork.c b/kernel/fork.c
index fbf4a4c0a628..d6e1a3205f62 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -140,6 +140,7 @@ void free_task(struct task_struct *tsk)
prop_local_destroy_single(&tsk->dirties);
free_thread_info(tsk->stack);
rt_mutex_debug_task_free(tsk);
+ ftrace_retfunc_exit_task(tsk);
free_task_struct(tsk);
}
EXPORT_SYMBOL(free_task);