pstore: Avoid recursive spinlocks in the oops_in_progress case
Like 8250 driver, when pstore is registered as a console, to avoid recursive spinlocks when panic happening, change the spin_lock_irqsave to spin_trylock_irqsave when oops_in_progress is true. Signed-off-by: liu chuansheng <chuansheng.liu@intel.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
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