diff options
| author | Huang, Tao <huangtao@rock-chips.com> | 2017-05-18 10:51:27 +0800 |
|---|---|---|
| committer | Huang, Tao <huangtao@rock-chips.com> | 2017-05-18 11:33:04 +0800 |
| commit | 850b23f6ba9affb949918a8f670ef0a1606c42a2 (patch) | |
| tree | 2d606d00517a7dd564d7d09fa367ec2149a090a6 /arch/arm | |
| parent | 7557d060d41d645fae85557a6bd8973b76f9fa66 (diff) | |
ARM: rockchip: Add workaround for unknown write of thread_info
We see the cpu of thread_info was changed by unknown reason sometimes,
which cause rq spinlock deadlock while schedule. Until we found the
root cause, we have to add this workaround.
Change-Id: Ib943ccb47a57fe4b267a1da853366363cd7f1f52
Signed-off-by: Huang, Tao <huangtao@rock-chips.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/thread_info.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/include/asm/thread_info.h b/arch/arm/include/asm/thread_info.h index 776757d1604a..af4a57fdc816 100644 --- a/arch/arm/include/asm/thread_info.h +++ b/arch/arm/include/asm/thread_info.h @@ -47,6 +47,13 @@ struct cpu_context_save { * __switch_to() assumes cpu_context follows immediately after cpu_domain. */ struct thread_info { +#ifdef CONFIG_ARCH_ROCKCHIP + /* + * FIXME: prevent unknown write of cpu + * we reservee 64 bytes to make sure cacheline aligned + */ + __u8 reserved[64]; +#endif unsigned long flags; /* low level flags */ int preempt_count; /* 0 => preemptable, <0 => bug */ mm_segment_t addr_limit; /* address limit */ |