Messages in this thread | | | Date | Tue, 5 May 2015 16:25:58 -0700 | From | josh@joshtrip ... | Subject | Re: [PATCH] rcu: make rcu_*_data variables static |
| |
On Tue, May 05, 2015 at 09:57:06PM +0800, Nicolas Iooss wrote: > rcu_bh_data, rcu_sched_data and rcu_preempt_data are never used outside > kernel/rcu/tree.c and thus can be made static. > > Doing so fixes a section mismatch warning reported by clang when > building LLVMLinux with -Wsection, because these variables were declared > in .data..percpu and defined in .data..percpu..shared_aligned since > commit 11bbb235c26f ("rcu: Use DEFINE_PER_CPU_SHARED_ALIGNED for > rcu_data"). > > Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Nice improvement.
Minor nit: since these are only one line each now, they don't really need a blank line between them, but *shrug*.
> --- > kernel/rcu/tree.c | 2 +- > kernel/rcu/tree.h | 3 --- > 2 files changed, 1 insertion(+), 4 deletions(-) > > diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c > index 233165da782f..e4a607fc5ad0 100644 > --- a/kernel/rcu/tree.c > +++ b/kernel/rcu/tree.c > @@ -91,7 +91,7 @@ static const char *tp_##sname##_varname __used __tracepoint_string = sname##_var > > #define RCU_STATE_INITIALIZER(sname, sabbr, cr) \ > DEFINE_RCU_TPS(sname) \ > -DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_data, sname##_data); \ > +static DEFINE_PER_CPU_SHARED_ALIGNED(struct rcu_data, sname##_data); \ > struct rcu_state sname##_state = { \ > .level = { &sname##_state.node[0] }, \ > .rda = &sname##_data, \ > diff --git a/kernel/rcu/tree.h b/kernel/rcu/tree.h > index a69d3dab2ec4..0c32f730d033 100644 > --- a/kernel/rcu/tree.h > +++ b/kernel/rcu/tree.h > @@ -519,14 +519,11 @@ extern struct list_head rcu_struct_flavors; > * RCU implementation internal declarations: > */ > extern struct rcu_state rcu_sched_state; > -DECLARE_PER_CPU(struct rcu_data, rcu_sched_data); > > extern struct rcu_state rcu_bh_state; > -DECLARE_PER_CPU(struct rcu_data, rcu_bh_data); > > #ifdef CONFIG_PREEMPT_RCU > extern struct rcu_state rcu_preempt_state; > -DECLARE_PER_CPU(struct rcu_data, rcu_preempt_data); > #endif /* #ifdef CONFIG_PREEMPT_RCU */ > > #ifdef CONFIG_RCU_BOOST > -- > 2.3.6 >
| |