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exit: move check_stack_usage() to the end of do_exit()

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It is not clear why check_stack_usage() is called so early and thus it
never checks the stack usage in, say, exit_notify() or
flush_ptrace_hw_breakpoint() or other functions which are only called by
do_exit().

Move the callsite down to the last preempt_disable/schedule.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2014-04-07 15:38:30 -07:00 committed by Linus Torvalds
parent c39df5fa37
commit 4bcb8232cf
1 changed files with 1 additions and 1 deletions
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2
kernel/exit.c
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@ -788,7 +788,6 @@ void do_exit(long code)
disassociate_ctty(1);
exit_task_namespaces(tsk);
exit_task_work(tsk);
check_stack_usage();
exit_thread();
/*
@ -842,6 +841,7 @@ void do_exit(long code)
validate_creds_for_do_exit(tsk);
check_stack_usage();
preempt_disable();
if (tsk->nr_dirtied)
__this_cpu_add(dirty_throttle_leaks, tsk->nr_dirtied);