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Christophe Leroy d4bf905307 powerpc: Fix CONFIG_TRACE_IRQFLAGS with CONFIG_VMAP_STACK 
When CONFIG_PROVE_LOCKING is selected together with (now default)
CONFIG_VMAP_STACK, kernel enter deadlock during boot.

At the point of checking whether interrupts are enabled or not, the
value of MSR saved on stack is read using the physical address of the
stack. But at this point, when using VMAP stack the DATA MMU
translation has already been re-enabled, leading to deadlock.

Don't use the physical address of the stack when
CONFIG_VMAP_STACK is set.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Fixes: 028474876f ("powerpc/32: prepare for CONFIG_VMAP_STACK")
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/daeacdc0dec0416d1c587cc9f9e7191ad3068dc0.1581095957.git.christophe.leroy@c-s.fr
2020-02-08 21:49:06 +11:00
arch powerpc: Fix CONFIG_TRACE_IRQFLAGS with CONFIG_VMAP_STACK 2020-02-08 21:49:06 +11:00
block SCSI misc on 20200129 2020-01-29 18:16:16 -08:00
certs certs: Add wrapper function to check blacklisted binary hash 2019-11-12 12:25:50 +11:00
crypto treewide: remove redundant IS_ERR() before error code check 2020-02-04 03:05:27 +00:00
Documentation powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
drivers powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
fs overlayfs update for 5.6 2020-02-04 11:45:21 +00:00
include Microblaze patches for 5.6-rc1 2020-02-04 11:58:07 +00:00
init init/main.c: fix misleading "This architecture does not have kernel memory protection" message 2020-01-31 10:30:41 -08:00
ipc proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
kernel proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
lib lib: new testcases for bitmap_parse{_user} 2020-02-04 03:05:27 +00:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
mm Merge branch 'akpm' (patches from Andrew) 2020-02-04 07:24:48 +00:00
net treewide: remove redundant IS_ERR() before error code check 2020-02-04 03:05:27 +00:00
samples proc: convert everything to "struct proc_ops" 2020-02-04 03:05:26 +00:00
scripts mm: remove __krealloc 2020-02-04 03:05:24 +00:00
security linux-kselftest-5.6-rc1-kunit 2020-01-29 15:25:34 -08:00
sound treewide: remove redundant IS_ERR() before error code check 2020-02-04 03:05:27 +00:00
tools powerpc updates for 5.6 2020-02-04 13:06:46 +00:00
usr initramfs: do not show compression mode choice if INITRAMFS_SOURCE is empty 2020-02-03 17:31:43 +00:00
virt Merge branch 'cve-2019-3016' into kvm-next-5.6 2020-01-30 18:47:59 +01:00
.clang-format clang-format: Update with the latest for_each macro list 2019-08-31 10:00:51 +02:00
.cocciconfig
.get_maintainer.ignore Opt out of scripts/get_maintainer.pl 2019-05-16 10:53:40 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore modpost: dump missing namespaces into a single modules.nsdeps file 2019-11-11 20:10:01 +09:00
.mailmap RTC for 5.6 2020-02-04 07:03:40 +00:00
COPYING
CREDITS open: introduce openat2(2) syscall 2020-01-18 09:19:18 -05:00
Kbuild kbuild: do not descend to ./Kbuild when cleaning 2019-08-21 21:03:58 +09:00
Kconfig docs: kbuild: convert docs to ReST and rename to *.rst 2019-06-14 14:21:21 -06:00
MAINTAINERS hwspinlock updates for v5.6 2020-02-04 09:04:37 +00:00
Makefile Kbuild updates for v5.6 2020-02-01 10:01:52 -08:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

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

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

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.