hwspinlock/core: use a mutex to protect the radix tree

Since we're using non-atomic radix tree allocations, we
should be protecting the tree using a mutex and not a
spinlock.

Non-atomic allocations and process context locking is good enough,
as the tree is manipulated only when locks are registered/
unregistered/requested/freed.

The locks themselves are still protected by spinlocks of course,
and mutexes are not involved in the locking/unlocking paths.

Cc: <[email protected]>
Signed-off-by: Juan Gutierrez <[email protected]>
[[email protected]: rewrite the commit log, #include mutex.h, add minor
commentary]
[[email protected]: update register/unregister parts in hwspinlock.txt]
Signed-off-by: Ohad Ben-Cohen <[email protected]>

0 files changed, 0 insertions, 0 deletions