From 8ecb1a59d6c6674bc98e4eee0c2482490748e21a Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Tue, 8 Mar 2016 11:54:14 +0100 Subject: s390/mm: use RCU for gmap notifier list and the per-mm gmap list The gmap notifier list and the gmap list in the mm_struct change rarely. Use RCU to optimize the reader of these lists. Reviewed-by: David Hildenbrand Signed-off-by: Martin Schwidefsky Signed-off-by: Christian Borntraeger --- arch/s390/include/asm/mmu.h | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'arch/s390/include/asm/mmu.h') diff --git a/arch/s390/include/asm/mmu.h b/arch/s390/include/asm/mmu.h index 081b2ad99d73..b941528cc49e 100644 --- a/arch/s390/include/asm/mmu.h +++ b/arch/s390/include/asm/mmu.h @@ -8,8 +8,9 @@ typedef struct { cpumask_t cpu_attach_mask; atomic_t attach_count; unsigned int flush_mm; - spinlock_t list_lock; + spinlock_t pgtable_lock; struct list_head pgtable_list; + spinlock_t gmap_lock; struct list_head gmap_list; unsigned long asce; unsigned long asce_limit; @@ -22,9 +23,11 @@ typedef struct { unsigned int use_skey:1; } mm_context_t; -#define INIT_MM_CONTEXT(name) \ - .context.list_lock = __SPIN_LOCK_UNLOCKED(name.context.list_lock), \ - .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ +#define INIT_MM_CONTEXT(name) \ + .context.pgtable_lock = \ + __SPIN_LOCK_UNLOCKED(name.context.pgtable_lock), \ + .context.pgtable_list = LIST_HEAD_INIT(name.context.pgtable_list), \ + .context.gmap_lock = __SPIN_LOCK_UNLOCKED(name.context.gmap_lock), \ .context.gmap_list = LIST_HEAD_INIT(name.context.gmap_list), static inline int tprot(unsigned long addr) -- cgit v1.2.3