Changeset 0cf813d in mainline for kernel/generic/include/compiler/barrier.h

Timestamp:

2012-07-16T15:37:11Z (13 years ago)

Author:

Adam Hraska <adam.hraska+hos@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

1c1da4b

Parents:

057e77f

Message:

rcu: Added new statistics. Changed reclaimers to run callbacks with preemption disabled if too many callbacks are pending in order to avoid exhausting system memory.

File:

• kernel/generic/include/compiler/barrier.h (modified) (1 diff)

kernel/generic/include/compiler/barrier.h

@@ -5 +5 @@
 #define compiler_barrier() asm volatile ("" ::: "memory")
 
+/** Forces the compiler to access (ie load/store) the variable only once. */
 #define ACCESS_ONCE(var) (*((volatile typeof(var)*)&(var)))