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linux-next/arch/mips/cavium-octeon
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Hidehiro Kawai 54c721b857 mips/panic: replace smp_send_stop() with kdump friendly version in panic path 
Daniel Walker reported problems which happens when
crash_kexec_post_notifiers kernel option is enabled
(https://lkml.org/lkml/2015/6/24/44).

In that case, smp_send_stop() is called before entering kdump routines
which assume other CPUs are still online.  As the result, kdump
routines fail to save other CPUs' registers.  Additionally for MIPS
OCTEON, it misses to stop the watchdog timer.

To fix this problem, call a new kdump friendly function,
crash_smp_send_stop(), instead of the smp_send_stop() when
crash_kexec_post_notifiers is enabled.  crash_smp_send_stop() is a
weak function, and it just call smp_send_stop().  Architecture
codes should override it so that kdump can work appropriately.
This patch provides MIPS version.

Fixes: f06e5153f4 (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Link: http://lkml.kernel.org/r/20160810080950.11028.28000.stgit@sysi4-13.yrl.intra.hitachi.co.jp
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Reported-by: Daniel Walker <dwalker@fifo99.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Cc: Xunlei Pang <xpang@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Daney <david.daney@cavium.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: "Steven J. Hill" <steven.hill@cavium.com>
Cc: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-11 15:06:32 -07:00
..
crypto Merge branch 'mvebu/drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc 2015-06-19 22:07:07 +08:00
executive MIPS: Octeon: Fix typo 2016-08-03 08:16:01 +02:00
cpu.c MIPS: Octeon: Place cnmips_cu2_setup in __init memory. 2010-10-04 18:34:00 +01:00
csrc-octeon.c MIPS: OCTEON: Don't attempt to use nonexistent registers on OCTEON III models. 2016-05-13 14:01:40 +02:00
dma-octeon.c dma-mapping: use unsigned long for dma_attrs 2016-08-04 08:50:07 -04:00
flash_setup.c MIPS: Octeon: Don't set .owner. 2015-04-08 01:10:53 +02:00
Kconfig treewide: Fix typos in Kconfig 2014-09-26 11:12:28 +02:00
Makefile of: clean-up unnecessary libfdt include paths 2015-06-04 20:16:47 -05:00
oct_ilm.c MIPS: Octeon: remove unnecessary null test before debugfs_remove_recursive 2014-08-02 00:06:47 +02:00
octeon_boot.h MIPS: Octeon: Handle bootloader structures in little-endian mode. 2015-04-01 17:21:23 +02:00
octeon-irq.c MIPS: Octeon: mark GPIO controller node not populated after IRQ init. 2016-09-29 18:59:49 +02:00
octeon-memcpy.S MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
octeon-platform.c MIPS: Octeon: Fix platform bus probing 2016-09-19 17:35:44 +02:00
Platform MIPS: OCTEON: Rename Kconfig CAVIUM_OCTEON_REFERENCE_BOARD to CAVIUM_OCTEON_SOC 2013-06-10 18:01:25 +02:00
setup.c mips/panic: replace smp_send_stop() with kdump friendly version in panic path 2016-10-11 15:06:32 -07:00
smp.c mips/octeon/smp: Convert to hotplug state machine 2016-09-19 21:44:32 +02:00