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Diffstat (limited to 'include/linux/bpf.h')
-rw-r--r--include/linux/bpf.h18
1 files changed, 14 insertions, 4 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 97498be2ca2e..7995940d4187 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -36,17 +36,26 @@ struct bpf_map_ops {
};
struct bpf_map {
- atomic_t refcnt;
+ /* 1st cacheline with read-mostly members of which some
+ * are also accessed in fast-path (e.g. ops, max_entries).
+ */
+ const struct bpf_map_ops *ops ____cacheline_aligned;
enum bpf_map_type map_type;
u32 key_size;
u32 value_size;
u32 max_entries;
u32 map_flags;
u32 pages;
- struct user_struct *user;
- const struct bpf_map_ops *ops;
- struct work_struct work;
+ bool unpriv_array;
+ /* 7 bytes hole */
+
+ /* 2nd cacheline with misc members to avoid false sharing
+ * particularly with refcounting.
+ */
+ struct user_struct *user ____cacheline_aligned;
+ atomic_t refcnt;
atomic_t usercnt;
+ struct work_struct work;
};
struct bpf_map_type_list {
@@ -189,6 +198,7 @@ struct bpf_prog_aux {
struct bpf_array {
struct bpf_map map;
u32 elem_size;
+ u32 index_mask;
/* 'ownership' of prog_array is claimed by the first program that
* is going to use this map or by the first program which FD is stored
* in the map to make sure that all callers and callees have the same