mm: introduce VM_BUG_ON_MM
Very similar to VM_BUG_ON_PAGE and VM_BUG_ON_VMA, dump struct_mm when the
bug is hit.
[akpm@linux-foundation.org: coding-style fixes]
[mhocko@suse.cz: fix build]
[mhocko@suse.cz: fix build some more]
[akpm@linux-foundation.org: do strange things to avoid doing strange things for the comma separators]
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Dave Jones <davej@redhat.com>
Signed-off-by: Michal Hocko <mhocko@suse.cz>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
index 569e4c8..877ef22 100644
--- a/include/linux/mmdebug.h
+++ b/include/linux/mmdebug.h
@@ -5,11 +5,13 @@
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)
@@ -27,6 +29,13 @@
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)
@@ -34,6 +43,7 @@
#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)