mempolicy: support optional mode flags

[linux-2.6-omap-h63xx.git] / include / linux / mempolicy.h

diff --git a/include/linux/mempolicy.h b/include/linux/mempolicy.h
index 389a06e8ee211cf4b745dd533d04be53402da62c..f2bab4d2fc40c8064a3844da0758f9ad90097db4 100644 (file)
--- 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)
 {
 }