diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-03-08 11:54:14 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-20 09:46:49 +0200 |
| commit | 8ecb1a59d6c6674bc98e4eee0c2482490748e21a (patch) | |
| tree | c39abe49adf4ef52fd94342b459c7c011cbd6da2 /arch/s390/include/asm/mmu.h | |
| parent | 414d3b07496604a4372466a6b474ca24291a143c (diff) | |
| download | lwn-8ecb1a59d6c6674bc98e4eee0c2482490748e21a.tar.gz lwn-8ecb1a59d6c6674bc98e4eee0c2482490748e21a.zip | |
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 <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/mmu.h')
| -rw-r--r-- | arch/s390/include/asm/mmu.h | 11 |
1 files changed, 7 insertions, 4 deletions
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) |