linux-kernel - [GIT PULL] Please pull powerpc/linux.git powerpc-5.8-8 tag

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Message-ID: <87ime34yya.fsf@mpe.ellerman.id.au>
Date:   Fri, 31 Jul 2020 23:05:17 +1000
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        npiggin@...il.com, "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
Subject: [GIT PULL] Please pull powerpc/linux.git powerpc-5.8-8 tag

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Hash: SHA256

Hi Linus,

Please pull one more powerpc fix for 5.8:

The following changes since commit f0479c4bcbd92d1a457d4a43bcab79f29d11334a:

  selftests/powerpc: Use proper error code to check fault address (2020-07-15 23:10:17 +1000)

are available in the git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git tags/powerpc-5.8-8

for you to fetch changes up to 909adfc66b9a1db21b5e8733e9ebfa6cd5135d74:

  powerpc/64s/hash: Fix hash_preload running with interrupts enabled (2020-07-27 17:02:09 +1000)

- ------------------------------------------------------------------
powerpc fixes for 5.8 #8

Fix a bug introduced by the changes we made to lockless page table walking this
cycle. When using the hash MMU, and perf with callchain recording, we can
deadlock if the PMI interrupts a hash fault, and the callchain recording then
takes a hash fault on the same page.

Thanks to:
  Nicholas Piggin, Aneesh Kumar K.V, Anton Blanchard, Athira Rajeev.

- ------------------------------------------------------------------
Nicholas Piggin (1):
      powerpc/64s/hash: Fix hash_preload running with interrupts enabled


 arch/powerpc/kernel/exceptions-64s.S  | 14 ++++++++---
 arch/powerpc/mm/book3s64/hash_utils.c | 25 ++++++++++++++++++++
 arch/powerpc/perf/core-book3s.c       |  6 +++++
 3 files changed, 42 insertions(+), 3 deletions(-)
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