Module spinlock

Reading from a spinlock address will:

• Return 0 if lock is already locked
• Otherwise return nonzero, and simultaneously claim the lock

Writing (any value) releases the lock.
If core 0 and core 1 attempt to claim the same lock simultaneously, core 0 wins.
The value returned on success is 0x1 << lock number.

Structs

• SPINLOCK_SPEC
  Reading from a spinlock address will:

Type Aliases

• R
  Register SPINLOCK%s reader
• W
  Register SPINLOCK%s writer