2 files changed, 18 insertions, 3 deletions

diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 389a06e8ee21..f2bab4d2fc40 100644
--- a/include/linux/mempolicy.h
+++ b/include/linux/mempolicy.h
@@ -8,6 +8,12 @@
  * Copyright 2003,2004 Andi Kleen SuSE Labs
  */
 
+/*
+ * Both the MPOL_* mempolicy mode and the MPOL_F_* optional mode flags are
+ * passed by the user to either set_mempolicy() or mbind() in an 'int' actual.
+ * The MPOL_MODE_FLAGS macro determines the legal set of optional mode flags.
+ */
+
 /* Policies */
 enum {
         MPOL_DEFAULT,
@@ -17,7 +23,14 @@ enum {
         MPOL_MAX,       /* always last member of enum */
 };
 
-/* Flags for get_mem_policy */
+/* Flags for set_mempolicy */
+/*
+ * MPOL_MODE_FLAGS is the union of all possible optional mode flags passed to
+ * either set_mempolicy() or mbind().
+ */
+#define MPOL_MODE_FLAGS (0)
+
+/* Flags for get_mempolicy */
 #define MPOL_F_NODE     (1<<0)  /* return next IL mode instead of node mask */
 #define MPOL_F_ADDR     (1<<1)  /* look up vma using address */
 #define MPOL_F_MEMS_ALLOWED (1<<2) /* return allowed memories */
@@ -66,6 +79,7 @@ struct mm_struct;
 struct mempolicy {
         atomic_t refcnt;
         unsigned short policy;  /* See MPOL_* above */
+        unsigned short flags;   /* See set_mempolicy() MPOL_F_* above */
         union {
                 short            preferred_node; /* preferred */
                 nodemask_t       nodes;         /* interleave/bind */
@@ -136,7 +150,7 @@ struct shared_policy {
 };
 
 void mpol_shared_policy_init(struct shared_policy *info, unsigned short policy,
-                                nodemask_t *nodes);
+                                unsigned short flags, nodemask_t *nodes);
 int mpol_set_shared_policy(struct shared_policy *info,
                                 struct vm_area_struct *vma,
                                 struct mempolicy *new);
@@ -203,7 +217,7 @@ static inline int mpol_set_shared_policy(struct shared_policy *info,
 }
 
 static inline void mpol_shared_policy_init(struct shared_policy *info,
-                                unsigned short policy, nodemask_t *nodes)
+                unsigned short policy, unsigned short flags, nodemask_t *nodes)
 {
 }
 
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h
index 639a4070708e..d7699a628d78 100644
--- a/include/linux/shmem_fs.h
+++ b/include/linux/shmem_fs.h
@@ -35,6 +35,7 @@ struct shmem_sb_info {
         gid_t gid;                  /* Mount gid for root directory */
         mode_t mode;                /* Mount mode for root directory */
         unsigned short policy;      /* Default NUMA memory alloc policy */
+        unsigned short flags;       /* Optional mempolicy flags */
         nodemask_t policy_nodes;    /* nodemask for preferred and bind */
 };