From 31c9afa6db122a5c7a7843278aaf77dd08ea6e98 Mon Sep 17 00:00:00 2001 From: Sasha Levin Date: Thu, 9 Oct 2014 15:28:37 -0700 Subject: 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 Cc: Dave Jones Signed-off-by: Michal Hocko Cc: Valdis Kletnieks Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/mmdebug.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/linux/mmdebug.h') diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h index 569e4c8d0ebb..877ef226f90f 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 @@ void dump_vma(const struct vm_area_struct *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) @@ -34,6 +43,7 @@ void dump_vma(const struct vm_area_struct *vma); #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) -- cgit v1.2.3