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jump_labels: Allow array initialisers

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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 <[email protected]>
Cc: Jonathan Corbet <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Suggested-by: Dave P Martin <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
This commit is contained in:
Catalin Marinas 2016-09-05 18:25:47 +01:00 • committed by Will Deacon
commit ef0da55a84
2 changed files with 21 additions and 0 deletions
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9
Documentation/static-keys.txt
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@ -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'