Changeset 7038f55 in mainline for kernel/arch/ia64/include/atomic.h

Timestamp:

2009-07-24T16:04:52Z (15 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

6ac14a70

Parents:

1641eb0

Message:

Add simple atomic_lock_arch() for ia64

File:

• kernel/arch/ia64/include/atomic.h (modified) (2 diffs)

kernel/arch/ia64/include/atomic.h

@@ -53 +53 @@
 }
 
-
-static inline uint64_t test_and_set(atomic_t *val) {
+static inline uint64_t test_and_set(atomic_t *val)
+{
         uint64_t v;
                 
         asm volatile (
-                "movl %0 = 0x01;;\n"
+                "movl %0 = 0x1;;\n"
                 "xchg8 %0 = %1, %0;;\n"
                 : "=r" (v), "+m" (val->count)
@@ -66 +66 @@
 }
 
+static inline void atomic_lock_arch(atomic_t *val)
+{
+        do {
+                while (val->count)
+                        ;
+        } while (test_and_set(val));
+}
 
 static inline void atomic_inc(atomic_t *val)