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authorCatalin Marinas <catalin.marinas@arm.com>2016-09-05 20:25:47 +0300
committerWill Deacon <will.deacon@arm.com>2016-09-07 11:41:11 +0300
commitef0da55a84a345f323ceddda3b6c78b25de90435 (patch)
tree3e2573808bf74527b393823533fe0be5b009522f /Documentation/static-keys.txt
parentdae8c235d9a21a564793ea9fe716233e11d30e21 (diff)
downloadlinux-ef0da55a84a345f323ceddda3b6c78b25de90435.tar.xz
jump_labels: Allow array initialisers
The static key API is currently designed around single variable definitions. There are cases where an array of static keys is desirable, so extend the API to allow this rather than using the internal static key implementation directly. Cc: Jason Baron <jbaron@akamai.com> Cc: Jonathan Corbet <corbet@lwn.net> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Suggested-by: Dave P Martin <Dave.Martin@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'Documentation/static-keys.txt')
-rw-r--r--Documentation/static-keys.txt9
1 files changed, 9 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'