(*) Implicit kernel memory barriers.
- - Locking functions.
+ - Lock acquisition functions.
- Interrupt disabling functions.
- Sleep and wake-up functions.
- Miscellaneous functions.
- (*) Inter-CPU locking barrier effects.
+ (*) Inter-CPU acquiring barrier effects.
- - Locks vs memory accesses.
- - Locks vs I/O accesses.
+ - Acquires vs memory accesses.
+ - Acquires vs I/O accesses.
(*) Where are memory barriers needed?
ordered I/O regions to be partially ordered. Its effects may go beyond the
CPU->Hardware interface and actually affect the hardware at some level.
-See the subsection "Locks vs I/O accesses" for more information.
+See the subsection "Acquires vs I/O accesses" for more information.
===============================
of arch specific code.
-ACQUIRING FUNCTIONS
--------------------
+LOCK ACQUISITION FUNCTIONS
+--------------------------
The Linux kernel has a number of locking constructs: