linux/arch/tile
Chris Metcalf 511f838945 arch/tile: adopt the new nmi_backtrace framework
Previously tile was rolling its own method of capturing backtrace data
in the NMI handlers, but it was relying on running printk() from the NMI
handler, which is not always safe.  So adopt the nmi_backtrace model
(with the new cpumask extension) instead.

So we can call the nmi_backtrace code directly from the nmi handler,
move the nmi_enter()/exit() into the top-level tile NMI handler.

The semantics of the routine change slightly since it is now synchronous
with the remote cores completing the backtraces.  Previously it was
asynchronous, but with protection to avoid starting a new remote
backtrace if the old one was still in progress.

Link: http://lkml.kernel.org/r/1472487169-14923-4-git-send-email-cmetcalf@mellanox.com
Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org> [arm]
Cc: Petr Mladek <pmladek@suse.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-10-07 18:46:30 -07:00
..
configs Merge branch 'akpm' (patches from Andrew) 2016-05-23 19:42:28 -07:00
gxio Fix typo 2016-05-23 12:17:22 -04:00
include arch/tile: adopt the new nmi_backtrace framework 2016-10-07 18:46:30 -07:00
kernel arch/tile: adopt the new nmi_backtrace framework 2016-10-07 18:46:30 -07:00
kvm rcu: Make SRCU optional by using CONFIG_SRCU 2015-01-06 11:04:29 -08:00
lib Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2016-07-27 10:54:11 -07:00
mm mm: move most file-based accounting to the node 2016-07-28 16:07:41 -07:00
Kbuild
Kconfig atomic64: no need for CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE 2016-10-07 18:46:30 -07:00
Kconfig.debug tile: remove DEBUG_EXTRA_FLAGS kernel config option 2013-09-03 14:52:17 -04:00
Makefile tile: remove DEBUG_EXTRA_FLAGS kernel config option 2013-09-03 14:52:17 -04:00