Re: spinlock recursion in aio_complete()

Bart Van Assche <bvanassche@xxxxxxx> · Tue, 23 May 2023 13:06:07 -0700

On 5/23/23 13:01, Helge Deller wrote:
Subject: [PATCH] Fix flush_dcache_page() for usage in irq context

flush_dcache_page() can be called with IRQs disabled, e.g. from
aio_complete().

Fix flush_dcache_page() on the arm, parisc and nios2 architectures
to not unintentionally re-enable IRQs by using xa_lock_irqsave() instead
of xa_lock_irq() for the flush_dcache_mmap_*lock() functions.

Please consider adding a Fixes: tag such that this patch is picked up 
automatically by the stable tree maintainers.

Thanks,

Bart.