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-rw-r--r--kernel/include/linux/mmdebug.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/kernel/include/linux/mmdebug.h b/kernel/include/linux/mmdebug.h
new file mode 100644
index 000000000..877ef226f
--- /dev/null
+++ b/kernel/include/linux/mmdebug.h
@@ -0,0 +1,58 @@
+#ifndef LINUX_MM_DEBUG_H
+#define LINUX_MM_DEBUG_H 1
+
+#include <linux/stringify.h>
+
+struct page;
+struct vm_area_struct;
+struct mm_struct;
+
+extern void dump_page(struct page *page, const char *reason);
+extern void dump_page_badflags(struct page *page, const char *reason,
+ unsigned long badflags);
+void dump_vma(const struct vm_area_struct *vma);
+void dump_mm(const struct mm_struct *mm);
+
+#ifdef CONFIG_DEBUG_VM
+#define VM_BUG_ON(cond) BUG_ON(cond)
+#define VM_BUG_ON_PAGE(cond, page) \
+ do { \
+ if (unlikely(cond)) { \
+ dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\
+ BUG(); \
+ } \
+ } while (0)
+#define VM_BUG_ON_VMA(cond, vma) \
+ do { \
+ if (unlikely(cond)) { \
+ dump_vma(vma); \
+ BUG(); \
+ } \
+ } while (0)
+#define VM_BUG_ON_MM(cond, mm) \
+ do { \
+ if (unlikely(cond)) { \
+ dump_mm(mm); \
+ BUG(); \
+ } \
+ } while (0)
+#define VM_WARN_ON(cond) WARN_ON(cond)
+#define VM_WARN_ON_ONCE(cond) WARN_ON_ONCE(cond)
+#define VM_WARN_ONCE(cond, format...) WARN_ONCE(cond, format)
+#else
+#define VM_BUG_ON(cond) BUILD_BUG_ON_INVALID(cond)
+#define VM_BUG_ON_PAGE(cond, page) VM_BUG_ON(cond)
+#define VM_BUG_ON_VMA(cond, vma) VM_BUG_ON(cond)
+#define VM_BUG_ON_MM(cond, mm) VM_BUG_ON(cond)
+#define VM_WARN_ON(cond) BUILD_BUG_ON_INVALID(cond)
+#define VM_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
+#define VM_WARN_ONCE(cond, format...) BUILD_BUG_ON_INVALID(cond)
+#endif
+
+#ifdef CONFIG_DEBUG_VIRTUAL
+#define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
+#else
+#define VIRTUAL_BUG_ON(cond) do { } while (0)
+#endif
+
+#endif