Add TuxOnIce support adapted for the 4.5-gnu kernel versionpck-4.5-gnu

1 files changed, 48 insertions, 0 deletions

diff --git a/include/linux/tuxonice.h b/include/linux/tuxonice.h
new file mode 100644
index 000000000..67b05a750
--- /dev/null
+++ b/include/linux/tuxonice.h
@@ -0,0 +1,48 @@
+/*
+ * include/linux/tuxonice.h
+ *
+ * Copyright (C) 2015 Nigel Cunningham (nigel at tuxonice net)
+ *
+ * This file is released under the GPLv2.
+ */
+
+#ifndef INCLUDE_LINUX_TUXONICE_H
+#define INCLUDE_LINUX_TUXONICE_H
+#ifdef CONFIG_TOI_INCREMENTAL
+extern void toi_set_logbuf_untracked(void);
+extern int toi_make_writable(pgd_t *pgd, unsigned long address);
+
+static inline int toi_incremental_support(void)
+{
+    return 1;
+}
+
+/* Copy Before Write */
+struct toi_cbw {
+    unsigned long pfn;
+    void *virt;
+    struct toi_cbw *next;
+};
+
+struct toi_cbw_state {
+    bool active;            /* Is a fault handler running? */
+    bool enabled;           /* Are we doing copy before write? */
+    int size;               /* The number of pages allocated */
+    struct toi_cbw *first, *next, *last;  /* Pointers to the data structure */
+};
+
+#define CBWS_PER_PAGE (PAGE_SIZE / sizeof(struct toi_cbw))
+DECLARE_PER_CPU(struct toi_cbw_state, toi_cbw_states);
+#else
+#define toi_set_logbuf_untracked() do { } while(0)
+static inline int toi_make_writable(pgd_t *pgd, unsigned long addr)
+{
+    return 0;
+}
+
+static inline int toi_incremental_support(void)
+{
+    return 0;
+}
+#endif
+#endif