On Tue, 25 May 2021 12:46:35 +0200 Vlastimil Babka <vbabka@xxxxxxx> wrote: > On 5/25/21 12:23 PM, Yejune Deng wrote: > > Use DEFINE_RAW_SPINLOCK instead of DEFINE_SPINLOCK object_map_lock > > that won't be preempted on mainline and PREEMPT_RT kernels. > > > > Signed-off-by: Yejune Deng <yejunedeng@xxxxxxxxx> > > RT tree also has such patch, with IMHO more thorough description: Yes please, a more thorough decription is needed. The description provided with this patch could be applied to every spinlock in the kernel!