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Peter Zijlstra 8ce371f984 lockdep: Fix per-cpu static objects Since commit `383776fa75` ("locking/lockdep: Handle statically initialized PER_CPU locks properly") we try to collapse per-cpu locks into a single class by giving them all the same key. For this key we choose the canonical address of the per-cpu object, which would be the offset into the per-cpu area. This has two problems: - there is a case where we run !0 lock->key through static_obj() and expect this to pass; it doesn't for canonical pointers. - 0 is a valid canonical address. Cure both issues by redefining the canonical address as the address of the per-cpu variable on the boot CPU. Since I didn't want to rely on CPU0 being the boot-cpu, or even existing at all, track the boot CPU in a variable. Fixes: `383776fa75` ("locking/lockdep: Handle statically initialized PER_CPU locks properly") Reported-by: kernel test robot <fengguang.wu@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Borislav Petkov <bp@suse.de> Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Cc: linux-mm@kvack.org Cc: wfg@linux.intel.com Cc: kernel test robot <fengguang.wu@intel.com> Cc: LKP <lkp@01.org> Link: http://lkml.kernel.org/r/20170320114108.kbvcsuepem45j5cr@hirez.programming.kicks-ass.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		2017-03-26 15:09:45 +02:00
arch	locking/atomic/x86: Use atomic_try_cmpxchg()	2017-03-23 08:54:41 +01:00
block	blk: improve order of bio handling in generic_make_request()	2017-03-08 10:55:17 -07:00
certs
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2017-03-04 10:42:53 -08:00
Documentation	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-12 14:11:38 -07:00
drivers	Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-12 14:11:38 -07:00
firmware
fs	Merge branch 'prep-for-5level'	2017-03-10 08:59:07 -08:00
include	lockdep: Fix per-cpu static objects	2017-03-26 15:09:45 +02:00
init	Change get_random_{int,log} to use the CRNG used by /dev/urandom and	2017-03-11 09:08:47 -08:00
ipc	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-03 10:16:38 -08:00
kernel	lockdep: Fix per-cpu static objects	2017-03-26 15:09:45 +02:00
lib	locking/refcounts: Use atomic_try_cmpxchg()	2017-03-23 08:54:41 +01:00
mm	lockdep: Fix per-cpu static objects	2017-03-26 15:09:45 +02:00
net	libceph: osd_request_timeout option	2017-03-07 14:30:38 +01:00
samples	Merge branch 'rebased-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2017-03-03 11:38:56 -08:00
scripts	Merge branch 'akpm' (patches from Andrew)	2017-03-10 08:34:42 -08:00
security	Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2017-03-03 10:16:38 -08:00
sound	scripts/spelling.txt: add "disble(d)" pattern and fix typo instances	2017-03-09 17:01:09 -08:00
tools	userfaultfd: selftest: vm: allow to build in vm/ directory	2017-03-09 17:01:10 -08:00
usr
virt	KVM: arm/arm64: VGIC: Fix command handling while ITS being disabled	2017-03-07 15:44:08 +00:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS	MAINTAINERS: usb251xb: remove reference inexistent file	2017-03-09 10:34:16 +01:00
Makefile	Linux 4.11-rc2	2017-03-12 14:47:08 -07:00
README

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.