[IPSEC]: Only set neighbour on top xfrm dst

[pandora-kernel.git] / lib / radix-tree.c

diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 0eee402..48c250f 100644 (file)
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -60,9 +60,14 @@ struct radix_tree_path {
 };
 
 #define RADIX_TREE_INDEX_BITS  (8 /* CHAR_BIT */ * sizeof(unsigned long))
-#define RADIX_TREE_MAX_PATH (RADIX_TREE_INDEX_BITS/RADIX_TREE_MAP_SHIFT + 2)
+#define RADIX_TREE_MAX_PATH (DIV_ROUND_UP(RADIX_TREE_INDEX_BITS, \
+                                         RADIX_TREE_MAP_SHIFT))
 
-static unsigned long height_to_maxindex[RADIX_TREE_MAX_PATH] __read_mostly;
+/*
+ * The height_to_maxindex array needs to be one deeper than the maximum
+ * path as height 0 holds only 1 entry.
+ */
+static unsigned long height_to_maxindex[RADIX_TREE_MAX_PATH + 1] __read_mostly;
 
 /*
  * Radix tree node cache.
@@ -93,7 +98,8 @@ radix_tree_node_alloc(struct radix_tree_root *root)
        struct radix_tree_node *ret;
        gfp_t gfp_mask = root_gfp_mask(root);
 
-       ret = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
+       ret = kmem_cache_alloc(radix_tree_node_cachep,
+                               set_migrateflags(gfp_mask, __GFP_RECLAIMABLE));
        if (ret == NULL && !(gfp_mask & __GFP_WAIT)) {
                struct radix_tree_preload *rtp;
 
@@ -137,7 +143,8 @@ int radix_tree_preload(gfp_t gfp_mask)
        rtp = &__get_cpu_var(radix_tree_preloads);
        while (rtp->nr < ARRAY_SIZE(rtp->nodes)) {
                preempt_enable();
-               node = kmem_cache_alloc(radix_tree_node_cachep, gfp_mask);
+               node = kmem_cache_alloc(radix_tree_node_cachep,
+                               set_migrateflags(gfp_mask, __GFP_RECLAIMABLE));
                if (node == NULL)
                        goto out;
                preempt_disable();
@@ -492,7 +499,11 @@ EXPORT_SYMBOL(radix_tree_tag_set);
 void *radix_tree_tag_clear(struct radix_tree_root *root,
                        unsigned long index, unsigned int tag)
 {
-       struct radix_tree_path path[RADIX_TREE_MAX_PATH], *pathp = path;
+       /*
+        * The radix tree path needs to be one longer than the maximum path
+        * since the "list" is null terminated.
+        */
+       struct radix_tree_path path[RADIX_TREE_MAX_PATH + 1], *pathp = path;
        struct radix_tree_node *slot = NULL;
        unsigned int height, shift;
 
@@ -934,7 +945,11 @@ static inline void radix_tree_shrink(struct radix_tree_root *root)
  */
 void *radix_tree_delete(struct radix_tree_root *root, unsigned long index)
 {
-       struct radix_tree_path path[RADIX_TREE_MAX_PATH], *pathp = path;
+       /*
+        * The radix tree path needs to be one longer than the maximum path
+        * since the "list" is null terminated.
+        */
+       struct radix_tree_path path[RADIX_TREE_MAX_PATH + 1], *pathp = path;
        struct radix_tree_node *slot = NULL;
        struct radix_tree_node *to_free;
        unsigned int height, shift;
@@ -1027,19 +1042,21 @@ int radix_tree_tagged(struct radix_tree_root *root, unsigned int tag)
 EXPORT_SYMBOL(radix_tree_tagged);
 
 static void
-radix_tree_node_ctor(void *node, struct kmem_cache *cachep, unsigned long flags)
+radix_tree_node_ctor(struct kmem_cache *cachep, void *node)
 {
        memset(node, 0, sizeof(struct radix_tree_node));
 }
 
 static __init unsigned long __maxindex(unsigned int height)
 {
-       unsigned int tmp = height * RADIX_TREE_MAP_SHIFT;
-       unsigned long index = (~0UL >> (RADIX_TREE_INDEX_BITS - tmp - 1)) >> 1;
-
-       if (tmp >= RADIX_TREE_INDEX_BITS)
-               index = ~0UL;
-       return index;
+       unsigned int width = height * RADIX_TREE_MAP_SHIFT;
+       int shift = RADIX_TREE_INDEX_BITS - width;
+
+       if (shift < 0)
+               return ~0UL;
+       if (shift >= BITS_PER_LONG)
+               return 0UL;
+       return ~0UL >> shift;
 }
 
 static __init void radix_tree_init_maxindex(void)