Changeset 86b31ba9 in mainline for kernel/arch/sparc64/include/barrier.h

Timestamp:

2006-09-26T16:12:38Z (18 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

a9ac978

Parents:

26678e5

Message:

Implement spinlock and test_and_set for sparc64.

File:

• kernel/arch/sparc64/include/barrier.h (modified) (1 diff)

kernel/arch/sparc64/include/barrier.h

@@ -37 +37 @@
 
 /*
- * TODO: Implement true SPARC V9 memory barriers for macros below.
+ * We assume TSO memory model in which only reads can pass earlier stores
+ * (but not earlier reads). Therefore, CS_ENTER_BARRIER() and CS_LEAVE_BARRIER()
+ * can be empty.
  */
 #define CS_ENTER_BARRIER()      __asm__ volatile ("" ::: "memory")