tree 84657d0e0eb3fb7653a15caf35822407dddb0274
parent f1c1a9ee00e4c53c9ccc03ec1aff4792948a25eb
author Sebastian Andrzej Siewior <bigeasy@linutronix.de> 1645093444 +0100
committer Thomas Gleixner <tglx@linutronix.de> 1645565102 +0100

fork: Move task stack accounting to do_exit()

There is no need to perform the stack accounting of the outgoing task in
its final schedule() invocation which happens with preemption disabled.
The task is leaving, the resources will be freed and the accounting can
happen in do_exit() before the actual schedule invocation which
frees the stack memory.

Move the accounting of the stack memory from release_task_stack() to
exit_task_stack_account() which then can be invoked from do_exit().

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220217102406.3697941-7-bigeasy@linutronix.de