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s390/mm: use RCU for gmap notifier list and the per-mm gmap list

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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>
This commit is contained in:
Martin Schwidefsky
2016-03-08 11:54:14 +01:00
committed by Christian Borntraeger
parent 414d3b0749
commit 8ecb1a59d6
5 changed files with 41 additions and 29 deletions
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arch/s390/include/asm/gmap.h
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@@ -39,6 +39,7 @@ struct gmap {
*/
struct gmap_notifier {
struct list_head list;
struct rcu_head rcu;
void (*notifier_call)(struct gmap *gmap, unsigned long start,
unsigned long end);
};