[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/fs/xfs/mrlock.h b/src/kernel/linux/v4.19/fs/xfs/mrlock.h
new file mode 100644
index 0000000..79155ee
--- /dev/null
+++ b/src/kernel/linux/v4.19/fs/xfs/mrlock.h
@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2006 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#ifndef __XFS_SUPPORT_MRLOCK_H__
+#define __XFS_SUPPORT_MRLOCK_H__
+
+#include <linux/rwsem.h>
+
+typedef struct {
+ struct rw_semaphore mr_lock;
+#if defined(DEBUG) || defined(XFS_WARN)
+ int mr_writer;
+#endif
+} mrlock_t;
+
+#if defined(DEBUG) || defined(XFS_WARN)
+#define mrinit(mrp, name) \
+ do { (mrp)->mr_writer = 0; init_rwsem(&(mrp)->mr_lock); } while (0)
+#else
+#define mrinit(mrp, name) \
+ do { init_rwsem(&(mrp)->mr_lock); } while (0)
+#endif
+
+#define mrlock_init(mrp, t,n,s) mrinit(mrp, n)
+#define mrfree(mrp) do { } while (0)
+
+static inline void mraccess_nested(mrlock_t *mrp, int subclass)
+{
+ down_read_nested(&mrp->mr_lock, subclass);
+}
+
+static inline void mrupdate_nested(mrlock_t *mrp, int subclass)
+{
+ down_write_nested(&mrp->mr_lock, subclass);
+#if defined(DEBUG) || defined(XFS_WARN)
+ mrp->mr_writer = 1;
+#endif
+}
+
+static inline int mrtryaccess(mrlock_t *mrp)
+{
+ return down_read_trylock(&mrp->mr_lock);
+}
+
+static inline int mrtryupdate(mrlock_t *mrp)
+{
+ if (!down_write_trylock(&mrp->mr_lock))
+ return 0;
+#if defined(DEBUG) || defined(XFS_WARN)
+ mrp->mr_writer = 1;
+#endif
+ return 1;
+}
+
+static inline void mrunlock_excl(mrlock_t *mrp)
+{
+#if defined(DEBUG) || defined(XFS_WARN)
+ mrp->mr_writer = 0;
+#endif
+ up_write(&mrp->mr_lock);
+}
+
+static inline void mrunlock_shared(mrlock_t *mrp)
+{
+ up_read(&mrp->mr_lock);
+}
+
+static inline void mrdemote(mrlock_t *mrp)
+{
+#if defined(DEBUG) || defined(XFS_WARN)
+ mrp->mr_writer = 0;
+#endif
+ downgrade_write(&mrp->mr_lock);
+}
+
+#endif /* __XFS_SUPPORT_MRLOCK_H__ */