linux-kernel - [PATCH 0/7] wchan: Fix wchan support

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Message-ID: <20211008111527.438276127@infradead.org>
Date:   Fri, 08 Oct 2021 13:15:27 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     keescook@...omium.org, jannh@...gle.com
Cc:     linux-kernel@...r.kernel.org, peterz@...radead.org,
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Subject: [PATCH 0/7] wchan: Fix wchan support

Hi,

This fixes up wchan which is various degrees of broken across the
architectures.

Patch 4 fixes wchan for x86, which has been returning 0 for the past many
releases.

Patch 5 fixes the fundamental race against scheduling.

Patch 6 deletes a lot and makes STACKTRACE unconditional

patch 7 fixes up a few STACKTRACE arch oddities

0day says all builds are good, so it must be perfect :-) I'm planning on
queueing up at least the first 5 patches, but I'm hoping the last two patches
can be too.

Also available here:

  git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/wchan

---
 arch/alpha/include/asm/processor.h      |  2 +-
 arch/alpha/kernel/process.c             |  5 ++-
 arch/arc/include/asm/processor.h        |  2 --
 arch/arc/kernel/stacktrace.c            | 19 +---------
 arch/arm/include/asm/processor.h        |  2 --
 arch/arm/kernel/process.c               | 24 -------------
 arch/arm64/include/asm/processor.h      |  2 --
 arch/arm64/kernel/process.c             | 28 ---------------
 arch/csky/include/asm/processor.h       |  2 --
 arch/csky/kernel/stacktrace.c           | 26 ++++----------
 arch/h8300/include/asm/processor.h      |  2 +-
 arch/h8300/kernel/process.c             |  5 +--
 arch/hexagon/include/asm/processor.h    |  3 --
 arch/hexagon/kernel/process.c           | 28 ---------------
 arch/ia64/include/asm/processor.h       |  3 --
 arch/ia64/kernel/process.c              | 31 -----------------
 arch/m68k/include/asm/processor.h       |  2 +-
 arch/m68k/kernel/process.c              |  4 +--
 arch/microblaze/include/asm/processor.h |  2 --
 arch/microblaze/kernel/process.c        |  6 ----
 arch/mips/include/asm/processor.h       |  2 --
 arch/mips/kernel/process.c              | 31 +----------------
 arch/mips/kernel/stacktrace.c           | 27 ++++++++------
 arch/nds32/include/asm/processor.h      |  2 --
 arch/nds32/kernel/process.c             | 28 ---------------
 arch/nds32/kernel/stacktrace.c          | 21 +++++------
 arch/nios2/include/asm/processor.h      |  2 +-
 arch/nios2/kernel/process.c             |  5 +--
 arch/openrisc/include/asm/processor.h   |  1 -
 arch/openrisc/kernel/process.c          |  6 ----
 arch/parisc/include/asm/processor.h     |  2 --
 arch/parisc/kernel/process.c            | 27 --------------
 arch/powerpc/include/asm/processor.h    |  2 --
 arch/powerpc/kernel/process.c           | 40 ---------------------
 arch/riscv/include/asm/processor.h      |  3 --
 arch/riscv/kernel/stacktrace.c          | 23 ------------
 arch/s390/include/asm/processor.h       |  1 -
 arch/s390/kernel/process.c              | 29 ---------------
 arch/sh/include/asm/processor_32.h      |  2 --
 arch/sh/kernel/process_32.c             | 22 ------------
 arch/sparc/include/asm/processor_32.h   |  2 +-
 arch/sparc/include/asm/processor_64.h   |  2 --
 arch/sparc/kernel/process_32.c          |  5 +--
 arch/sparc/kernel/process_64.c          | 31 -----------------
 arch/um/include/asm/processor-generic.h |  1 -
 arch/um/kernel/process.c                | 35 -------------------
 arch/x86/include/asm/processor.h        |  2 --
 arch/x86/kernel/process.c               | 62 ---------------------------------
 arch/xtensa/include/asm/processor.h     |  2 --
 arch/xtensa/kernel/process.c            | 32 -----------------
 fs/proc/array.c                         |  7 ++--
 fs/proc/base.c                          | 19 +++++-----
 include/linux/sched.h                   |  1 +
 kernel/sched/core.c                     | 34 ++++++++++++++++++
 lib/Kconfig.debug                       |  7 +---
 scripts/leaking_addresses.pl            |  3 +-
 56 files changed, 97 insertions(+), 622 deletions(-)