On Sun, Mar 31, 2024 at 7:10 PM Joel Fernandes <joel@xxxxxxxxxxxxxxxxx> wrote: > > > > > On Mar 28, 2024, at 1:20 PM, Lai Jiangshan <jiangshanlai@xxxxxxxxx> wrote: > > > > From: Lai Jiangshan <jiangshan.ljs@xxxxxxxxxxxx> > > > > Prepare for arch-specific-defined rcu_preempt_depth_set(). > > > > No functionality change intended, but it has to be defined as a macro > > as rcupdate.h is a very low level header included from areas that don't > > even know about the task struct "current". > > Sorry I did not follow changelog. If some rcupdate.h includers do not know > about task_struct, how does adding a macro that uses current help? > Hello This is how macro works and it expands blindly based on tokens on the usage-sites. And rcu_preempt_depth() & rcu_preempt_depth_set() are not universally used wrappers, the user can simply also include linux/sched.h to make they work. Thanks Lai
