[PATCH v3 00/57] Scope-based Resource Management

[Peter Zijlstra]

Hi,

After a wee bit of bike-shedding on the syntax/API of the thing I think we're
in a reasonable shape.

There's still the no_free_ptr() vs take_ptr() thing, but that can be easily
sorted with a little script over the patches if we reach consensus.

I've taken to converting kernel/sched/core.c and kernel/events/core.c to see
how well this stuff actually works. Unlike last time, I've split them up into a
gazillion little patches. Both for my sanity -- bisect is genius when you're
trying to debug stuff in the middle of the night as well as reviewer sanity.

These are by no means 'complete' convertions, I've mostly focussed on functions
that had 'goto' in them. Since that's a large part of why I started on all this.

x86_x64-defconfig boots and passes perf test. I'll go figure out how to point
syzcaller at it.

The patches have gone through a few cycles of 0day over the weekend, and mostly
builds fine now.

Dan Carpenter poked me about how sparse doesn't yet understand the __cleanup__
attribute and seems to suffer from decl-after-stmt issues, so that might be
something that needs attention.

Anyway, does this look like something we can live with?

---
 Makefile                            |    6 +-
 arch/arm64/kernel/vdso32/Makefile   |    2 -
 drivers/dma/ioat/dma.c              |   12 +-
 include/linux/cleanup.h             |  167 ++++
 include/linux/compiler-clang.h      |    9 +
 include/linux/compiler_attributes.h |    6 +
 include/linux/cpu.h                 |    2 +
 include/linux/device.h              |    7 +
 include/linux/file.h                |   11 +
 include/linux/irqflags.h            |    7 +
 include/linux/mutex.h               |    4 +
 include/linux/percpu.h              |    4 +
 include/linux/perf_event.h          |   14 +-
 include/linux/preempt.h             |    5 +
 include/linux/rcupdate.h            |    3 +
 include/linux/rwsem.h               |    8 +
 include/linux/sched/task.h          |    2 +
 include/linux/slab.h                |    3 +
 include/linux/spinlock.h            |   31 +
 include/linux/srcu.h                |    5 +
 kernel/events/core.c                | 1642 +++++++++++++++--------------------
 kernel/sched/core.c                 |  931 +++++++++-----------
 kernel/sched/sched.h                |   40 +
 scripts/checkpatch.pl               |    2 +-
 security/apparmor/include/lib.h     |    6 +-
 25 files changed, 1433 insertions(+), 1496 deletions(-)