sh: Fix kernel thread stack corruption with preempt.

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When I run a preemptive kernel-2.6.20 for SH7780, a created
kthread(pdflush) can not exit by do_exit() in kernel_thread_helper. I
think that the created kthread should have a room for 'struct pt_regs'
space on the stack top, because __switch_to() will refer to the space as
follows using 'regs = task_pt_regs(prev)' and next condition may be true.

Signed-off-by: Hideo Saito <saito@densan.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

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Hideo Saito 2007-02-28 18:35:42 +09:00 • committed by Paul Mundt

parent e523d93c84

commit e6bcf562e5

1 changed files with 2 additions and 3 deletions

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arch/sh/kernel/process.c

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