Add the missing callback and the corresponding description in the relevant chapter.
Signed-off-by: Antonio Borneo <[email protected]> --- Documentation/locking/hwspinlock.rst | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/locking/hwspinlock.rst b/Documentation/locking/hwspinlock.rst index a737c702a7d1d..fbca4e7bf4ceb 100644 --- a/Documentation/locking/hwspinlock.rst +++ b/Documentation/locking/hwspinlock.rst @@ -425,6 +425,7 @@ There are three possible callbacks defined in 'struct hwspinlock_ops':: struct hwspinlock_ops { int (*trylock)(struct hwspinlock *lock); void (*unlock)(struct hwspinlock *lock); + int (*bust)(struct hwspinlock *lock, unsigned int id); void (*relax)(struct hwspinlock *lock); }; @@ -436,6 +437,10 @@ return 0 on failure and 1 on success. This callback may **not** sleep. The ->unlock() callback releases the lock. It always succeed, and it, too, may **not** sleep. +The ->bust() callback is optional. It is called by hwspinlock core to bust a +specific lock when the remote processor 'id' is not responding, e.g. due to a +firmware crash. + The ->relax() callback is optional. It is called by hwspinlock core while spinning on a lock, and can be used by the underlying implementation to force a delay between two successive invocations of ->trylock(). It may **not** sleep. base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f -- 2.34.1
