diff options
| -rw-r--r-- | Documentation/static-keys.txt | 9 | ||||
| -rw-r--r-- | include/linux/jump_label.h | 12 |
2 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/static-keys.txt b/Documentation/static-keys.txt index 477927becacb..ea8d7b4e53f0 100644 --- a/Documentation/static-keys.txt +++ b/Documentation/static-keys.txt @@ -15,6 +15,8 @@ The updated API replacements are: DEFINE_STATIC_KEY_TRUE(key); DEFINE_STATIC_KEY_FALSE(key); +DEFINE_STATIC_KEY_ARRAY_TRUE(keys, count); +DEFINE_STATIC_KEY_ARRAY_FALSE(keys, count); static_branch_likely() static_branch_unlikely() @@ -140,6 +142,13 @@ static_branch_inc(), will change the branch back to true. Likewise, if the key is initialized false, a 'static_branch_inc()', will change the branch to true. And then a 'static_branch_dec()', will again make the branch false. +Where an array of keys is required, it can be defined as: + + DEFINE_STATIC_KEY_ARRAY_TRUE(keys, count); + +or: + + DEFINE_STATIC_KEY_ARRAY_FALSE(keys, count); 4) Architecture level code patching interface, 'jump labels' diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h index 661af564fae8..a534c7f15a61 100644 --- a/include/linux/jump_label.h +++ b/include/linux/jump_label.h @@ -21,6 +21,8 @@ * * DEFINE_STATIC_KEY_TRUE(key); * DEFINE_STATIC_KEY_FALSE(key); + * DEFINE_STATIC_KEY_ARRAY_TRUE(keys, count); + * DEFINE_STATIC_KEY_ARRAY_FALSE(keys, count); * static_branch_likely() * static_branch_unlikely() * @@ -270,6 +272,16 @@ struct static_key_false { #define DEFINE_STATIC_KEY_FALSE(name) \ struct static_key_false name = STATIC_KEY_FALSE_INIT +#define DEFINE_STATIC_KEY_ARRAY_TRUE(name, count) \ + struct static_key_true name[count] = { \ + [0 ... (count) - 1] = STATIC_KEY_TRUE_INIT, \ + } + +#define DEFINE_STATIC_KEY_ARRAY_FALSE(name, count) \ + struct static_key_false name[count] = { \ + [0 ... (count) - 1] = STATIC_KEY_FALSE_INIT, \ + } + extern bool ____wrong_branch_error(void); #define static_key_enabled(x) \ |