kernel/include/linux/mmdebug.h

   1 #ifndef LINUX_MM_DEBUG_H
   2 #define LINUX_MM_DEBUG_H 1
   3
   4 #include <linux/bug.h>
   5 #include <linux/stringify.h>
   6
   7 struct page;
   8 struct vm_area_struct;
   9 struct mm_struct;
  10
  11 extern void dump_page(struct page *page, const char *reason);
  12 extern void dump_page_badflags(struct page *page, const char *reason,
  13                                unsigned long badflags);
  14 void dump_vma(const struct vm_area_struct *vma);
  15 void dump_mm(const struct mm_struct *mm);
  16
  17 #ifdef CONFIG_DEBUG_VM
  18 #define VM_BUG_ON(cond) BUG_ON(cond)
  19 #define VM_BUG_ON_PAGE(cond, page)                                      \
  20         do {                                                            \
  21                 if (unlikely(cond)) {                                   \
  22                         dump_page(page, "VM_BUG_ON_PAGE(" __stringify(cond)")");\
  23                         BUG();                                          \
  24                 }                                                       \
  25         } while (0)
  26 #define VM_BUG_ON_VMA(cond, vma)                                        \
  27         do {                                                            \
  28                 if (unlikely(cond)) {                                   \
  29                         dump_vma(vma);                                  \
  30                         BUG();                                          \
  31                 }                                                       \
  32         } while (0)
  33 #define VM_BUG_ON_MM(cond, mm)                                          \
  34         do {                                                            \
  35                 if (unlikely(cond)) {                                   \
  36                         dump_mm(mm);                                    \
  37                         BUG();                                          \
  38                 }                                                       \
  39         } while (0)
  40 #define VM_WARN_ON(cond) WARN_ON(cond)
  41 #define VM_WARN_ON_ONCE(cond) WARN_ON_ONCE(cond)
  42 #define VM_WARN_ONCE(cond, format...) WARN_ONCE(cond, format)
  43 #else
  44 #define VM_BUG_ON(cond) BUILD_BUG_ON_INVALID(cond)
  45 #define VM_BUG_ON_PAGE(cond, page) VM_BUG_ON(cond)
  46 #define VM_BUG_ON_VMA(cond, vma) VM_BUG_ON(cond)
  47 #define VM_BUG_ON_MM(cond, mm) VM_BUG_ON(cond)
  48 #define VM_WARN_ON(cond) BUILD_BUG_ON_INVALID(cond)
  49 #define VM_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond)
  50 #define VM_WARN_ONCE(cond, format...) BUILD_BUG_ON_INVALID(cond)
  51 #endif
  52
  53 #ifdef CONFIG_DEBUG_VIRTUAL
  54 #define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
  55 #else
  56 #define VIRTUAL_BUG_ON(cond) do { } while (0)
  57 #endif
  58
  59 #endif