On Thu, Dec 05, 2019 at 02:02:18PM +0530 Srikar Dronamraju wrote: > With the static key shared processor available, is_shared_processor() > can return without having to query the lppaca structure. > > Cc: Parth Shah <pa...@linux.ibm.com> > Cc: Ihor Pasichnyk <ihor.pasich...@ibm.com> > Cc: Juri Lelli <juri.le...@redhat.com> > Cc: Phil Auld <pa...@redhat.com> > Cc: Waiman Long <long...@redhat.com> > Signed-off-by: Srikar Dronamraju <sri...@linux.vnet.ibm.com> > --- > Changelog v1 (https://patchwork.ozlabs.org/patch/1204192/) ->v2: > Now that we no more refer to lppaca, remove the comment. > > Changelog v2->v3: > Code is now under CONFIG_PPC_SPLPAR as it depends on CONFIG_PPC_PSERIES. > This was suggested by Waiman Long. > > arch/powerpc/include/asm/spinlock.h | 9 ++------- > 1 file changed, 2 insertions(+), 7 deletions(-) > > diff --git a/arch/powerpc/include/asm/spinlock.h > b/arch/powerpc/include/asm/spinlock.h > index de817c25deff..e83d57f27566 100644 > --- a/arch/powerpc/include/asm/spinlock.h > +++ b/arch/powerpc/include/asm/spinlock.h > @@ -111,13 +111,8 @@ static inline void splpar_rw_yield(arch_rwlock_t *lock) > {}; > > static inline bool is_shared_processor(void) > { > -/* > - * LPPACA is only available on Pseries so guard anything LPPACA related to > - * allow other platforms (which include this common header) to compile. > - */ > -#ifdef CONFIG_PPC_PSERIES > - return (IS_ENABLED(CONFIG_PPC_SPLPAR) && > - lppaca_shared_proc(local_paca->lppaca_ptr)); > +#ifdef CONFIG_PPC_SPLPAR > + return static_branch_unlikely(&shared_processor); > #else > return false; > #endif > -- > 2.18.1 >
Fwiw, Acked-by: Phil Auld <pa...@redhat.com> --
