hugeltb: mark hugelb_max_hstate __read_mostly

We set this value only during boot.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 4aca057272440aa92708c8d997b4ba3121b22524..3d677dd418984ef8e4621ef054125bf29bb75746 100644 (file)
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -22,7 +22,7 @@ struct hugepage_subpool {
 };
 
 extern spinlock_t hugetlb_lock;
-extern int hugetlb_max_hstate;
+extern int hugetlb_max_hstate __read_mostly;
 #define for_each_hstate(h) \
        for ((h) = hstates; (h) < &hstates[hugetlb_max_hstate]; (h)++)
 

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index e899a2d5dee3b59c4302551bfc48948133e0e726..d5971597736b647c6062746efb4f048c35a8c37f 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -35,7 +35,7 @@ const unsigned long hugetlb_zero = 0, hugetlb_infinity = ~0UL;
 static gfp_t htlb_alloc_mask = GFP_HIGHUSER;
 unsigned long hugepages_treat_as_movable;
 
-int hugetlb_max_hstate;
+int hugetlb_max_hstate __read_mostly;
 unsigned int default_hstate_idx;
 struct hstate hstates[HUGE_MAX_HSTATE];