[GIT PULL] pstore fix for v4.10-rc8

[GIT PULL] pstore fix for v4.10-rc8

[Kees Cook]

Hi,

This pstore regression was just noticed. If I'm too late, this can land
in v4.11 and -stable, but if the fix window is still open for v4.10, I'd
love to see this fix pulled for v4.10.

Thanks!

-Kees

The following changes since commit d966564fcdc19e13eb6ba1fbe6b8101070339c3d:

  Revert "x86/ioapic: Restore IO-APIC irq_chip retrigger callback" (2017-02-08 18:08:29 -0800)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git tags/pstore-v4.10-rc8

for you to fetch changes up to 8672aed7bd865774257efd40929702759a869329:

  pstore: don't OOPS when there are no ftrace zones (2017-02-09 11:49:49 -0800)

----------------------------------------------------------------
Fix pstore regression (boot Oops) when ftrace disabled, from Brian Norris.

----------------------------------------------------------------
Brian Norris (1):
      pstore: don't OOPS when there are no ftrace zones

 fs/pstore/ram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
Kees Cook
Pixel Security

[PATCH] ARM: multi_v7_defconfig: enable pstore configs

[Brian Norris]

It's useful to get testing on these features on various boards (e.g., on
KernelCI), and (when they're working) the ramoops feature is extremely
helpful for debugging live systems.

Signed-off-by: Brian Norris <briannorris@chromium.org>
---
+ ARM folks
- Linus

>From Kees's recent pull request:

On Thu, Feb 09, 2017 at 11:56:46AM -0800, Kees Cook wrote:
> Hi,
> 
> This pstore regression was just noticed. If I'm too late, this can land
> in v4.11 and -stable, but if the fix window is still open for v4.10, I'd
> love to see this fix pulled for v4.10.
> 
> Thanks!
> 
> -Kees
[...]
> ----------------------------------------------------------------
> Fix pstore regression (boot Oops) when ftrace disabled, from Brian Norris.
> 
> ----------------------------------------------------------------

I expect we aren't getting regular testing coverage (e.g., from
KernelCI, which has a few ARM-based Chromebooks in the lab [1], which
would have trivially caught the bug) because pstore is not enabled on
the multiplatform config that gets used there. Seems like a good idea,
so we can catch regressions like this automatically?

[1] https://kernelci.org/boot/rk3288-veyron-jerry/

 arch/arm/configs/multi_v7_defconfig | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 028d2b70e3b5..74bdb89faff6 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -906,6 +906,10 @@ CONFIG_TMPFS=y
 CONFIG_SQUASHFS=y
 CONFIG_SQUASHFS_LZO=y
 CONFIG_SQUASHFS_XZ=y
+CONFIG_PSTORE=y
+CONFIG_PSTORE_CONSOLE=y
+CONFIG_PSTORE_PMSG=y
+CONFIG_PSTORE_RAM=y
 CONFIG_NFS_FS=y
 CONFIG_NFS_V3_ACL=y
 CONFIG_NFS_V4=y
-- 
2.11.0.483

Re: [PATCH] ARM: multi_v7_defconfig: enable pstore configs

[Arnd Bergmann]

On Thursday, February 9, 2017 12:52:50 PM CET Brian Norris wrote:
> It's useful to get testing on these features on various boards (e.g., on
> KernelCI), and (when they're working) the ramoops feature is extremely
> helpful for debugging live systems.
> 
> Signed-off-by: Brian Norris <briannorris@chromium.org>
> ---
> + ARM folks
> - Linus

Applied to next/defconfig, thanks!

	Arnd