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| author | Sasha Levin <sasha.levin@oracle.com> | 2014-10-09 15:28:37 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-10-09 22:25:58 -0400 |
| commit | 31c9afa6db122a5c7a7843278aaf77dd08ea6e98 (patch) | |
| tree | aaa9854a4b07f458a0972141de3ee0a77d264641 /include/linux/mmdebug.h | |
| parent | 82742a3a5152195edd69528c0c9a1a6fb9caa293 (diff) | |
| download | lwn-31c9afa6db122a5c7a7843278aaf77dd08ea6e98.tar.gz lwn-31c9afa6db122a5c7a7843278aaf77dd08ea6e98.zip | |
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>
Diffstat (limited to 'include/linux/mmdebug.h')
| -rw-r--r-- | include/linux/mmdebug.h | 10 |
1 files changed, 10 insertions, 0 deletions
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) |