[OLK-6.6] printk: Avoid logbuf_lock deadlock in oops_end()

A CPU executing vprintk_emit might be interrupted by #PF exception,
this may leads to logbuf_lock deadlock:

输入图片说明

logbuf_lock is taken at A and the deadlock happends at B.

Pass 1 to bust_spinlocks() in the oops_end() to avoid this deadlock.

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GVP openEuler / kernel

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GVPopenEuler / kernel

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[OLK-6.6] printk: Avoid logbuf_lock deadlock in oops_end()

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GVP openEuler / kernel