Advance redbear-full Wayland, greeter, and Qt integration

Consolidate the active desktop path around redbear-full while landing the greeter/session stack and the runtime fixes needed to keep Wayland and KWin bring-up moving forward.

local/recipes/drivers/linux-kpi/source/src/c_headers/linux/export.h

@@ -0,0 +1,6 @@
+#ifndef _LINUX_EXPORT_H
+#define _LINUX_EXPORT_H
+
+#include <linux/module.h>
+
+#endif /* _LINUX_EXPORT_H */

local/recipes/drivers/linux-kpi/source/src/c_headers/linux/refcount.h

@@ -0,0 +1,73 @@
+#ifndef _LINUX_REFCOUNT_H
+#define _LINUX_REFCOUNT_H
+
+#include <linux/atomic.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+
+typedef struct {
+    atomic_t refs;
+} refcount_t;
+
+#define REFCOUNT_INIT(value) { .refs = { .counter = (value) } }
+
+static inline unsigned int refcount_read(const refcount_t *r)
+{
+    return (unsigned int)atomic_read(&r->refs);
+}
+
+static inline void refcount_set(refcount_t *r, int n)
+{
+    atomic_set(&r->refs, n);
+}
+
+static inline void refcount_inc(refcount_t *r)
+{
+    atomic_inc(&r->refs);
+}
+
+static inline int refcount_inc_not_zero(refcount_t *r)
+{
+    return atomic_inc_not_zero(&r->refs);
+}
+
+static inline int refcount_dec_and_test(refcount_t *r)
+{
+    return atomic_dec_and_test(&r->refs);
+}
+
+static inline int refcount_dec_not_one(refcount_t *r)
+{
+    int current;
+
+    do {
+        current = atomic_read(&r->refs);
+        if (current == 1) {
+            return 0;
+        }
+    } while (atomic_cmpxchg(&r->refs, current, current - 1) != current);
+
+    return 1;
+}
+
+static inline int refcount_dec_and_mutex_lock(refcount_t *r, struct mutex *lock)
+{
+    if (!refcount_dec_and_test(r)) {
+        return 0;
+    }
+
+    mutex_lock(lock);
+    return 1;
+}
+
+static inline int refcount_dec_and_lock(refcount_t *r, spinlock_t *lock)
+{
+    if (!refcount_dec_and_test(r)) {
+        return 0;
+    }
+
+    spin_lock(lock);
+    return 1;
+}
+
+#endif /* _LINUX_REFCOUNT_H */