From: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Date: Sat, 21 Jul 2012 00:54:00 +0000 (+1000)
Subject: hugeltb: mark hugelb_max_hstate __read_mostly
X-Git-Tag: next-20120725~1^2~248
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1de179790bf79cdf58c71292e92e034632aefbb9;p=karo-tx-linux.git

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 4aca05727244..3d677dd41898 100644
--- 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 e899a2d5dee3..d5971597736b 100644
--- 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];