Let's provide a basic lock implementation that should work on most
architectures.
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
lib/asm-generic/spinlock.h | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/lib/asm-generic/spinlock.h b/lib/asm-generic/spinlock.h
index 3141744..e8c3a58 100644
--- a/lib/asm-generic/spinlock.h
+++ b/lib/asm-generic/spinlock.h
@@ -1,4 +1,18 @@
#ifndef _ASM_GENERIC_SPINLOCK_H_
#define _ASM_GENERIC_SPINLOCK_H_
-#error need architecture specific asm/spinlock.h
+
+struct spinlock {
+ unsigned int v;
+};
+
+static inline void spin_lock(struct spinlock *lock)
+{
+ while (!__sync_bool_compare_and_swap(&lock->v, 0, 1));
+}
+
+static inline void spin_unlock(struct spinlock *lock)
+{
+ __sync_bool_compare_and_swap(&lock->v, 1, 0);
+}
+
#endif
--
2.9.3
