auto import from //depot/cupcake/@135843

1 files changed, 30 insertions, 0 deletions

diff --git a/libc/kernel/common/linux/spinlock_up.h b/libc/kernel/common/linux/spinlock_up.h
new file mode 100644
index 000000000..b4958dcaf
--- /dev/null
+++ b/libc/kernel/common/linux/spinlock_up.h
@@ -0,0 +1,30 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef __LINUX_SPINLOCK_UP_H
+#define __LINUX_SPINLOCK_UP_H
+
+#ifndef __LINUX_SPINLOCK_H
+#error "please don't include this file directly"
+#endif
+
+#define __raw_spin_is_locked(lock) ((void)(lock), 0)
+
+#define __raw_spin_lock(lock) do { (void)(lock); } while (0)
+#define __raw_spin_unlock(lock) do { (void)(lock); } while (0)
+#define __raw_spin_trylock(lock) ({ (void)(lock); 1; })
+
+#define __raw_read_can_lock(lock) (((void)(lock), 1))
+#define __raw_write_can_lock(lock) (((void)(lock), 1))
+
+#define __raw_spin_unlock_wait(lock)   do { cpu_relax(); } while (__raw_spin_is_locked(lock))
+
+#endif