[0/4] mmu notifier debug checks v2

Message

Daniel Vetter Dec. 10, 2018, 10:36 a.m. UTC

Hi all,

Here's v2 of my mmu notifier debug checks.

I think the last two patches could probably be extended to all callbacks,
but I'm not really clear on the exact rules. But happy to extend them if
there's interest.

This stuff helps us catch issues in the i915 mmu notifier implementation.

Thanks, Daniel

Daniel Vetter (4):
  mm: Check if mmu notifier callbacks are allowed to fail
  kernel.h: Add non_block_start/end()
  mm, notifier: Catch sleeping/blocking for !blockable
  mm, notifier: Add a lockdep map for invalidate_range_start

 include/linux/kernel.h       | 10 +++++++++-
 include/linux/mmu_notifier.h |  6 ++++++
 include/linux/sched.h        |  4 ++++
 kernel/sched/core.c          |  6 +++---
 mm/mmu_notifier.c            | 18 +++++++++++++++++-
 5 files changed, 39 insertions(+), 5 deletions(-)