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Olof Johansson b822a6da85 UPSTREAM: kernel/sched/psi.c: simplify cgroup_move_task()
The existing code triggered an invalid warning about 'rq' possibly being
used uninitialized.  Instead of doing the silly warning suppression by
initializa it to NULL, refactor the code to bail out early instead.

Warning was:

  kernel/sched/psi.c: In function `cgroup_move_task':
  kernel/sched/psi.c:639:13: warning: `rq' may be used uninitialized in this function [-Wmaybe-uninitialized]

Link: http://lkml.kernel.org/r/20181103183339.8669-1-olof@lixom.net
Fixes: 2ce7135adc ("psi: cgroup support")
Signed-off-by: Olof Johansson <olof@lixom.net>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

(cherry picked from commit 8fcb2312d1)

Bug: 127712811
Test: lmkd in PSI mode
Change-Id: Id989da224a726082e0cfa5d5d9460bf63d448a93
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
2019-03-21 16:25:27 -07:00
arch BACKPORT: sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD 2019-03-21 16:25:26 -07:00
block BACKPORT: sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD 2019-03-21 16:25:26 -07:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto This is the 4.19.25 stable release 2019-02-23 09:20:46 +01:00
Documentation UPSTREAM: psi: cgroup support 2019-03-21 16:25:27 -07:00
drivers BACKPORT: sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD 2019-03-21 16:25:26 -07:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs BACKPORT: sched: loadavg: consolidate LOAD_INT, LOAD_FRAC, CALC_LOAD 2019-03-21 16:25:26 -07:00
include UPSTREAM: psi: cgroup support 2019-03-21 16:25:27 -07:00
init UPSTREAM: psi: cgroup support 2019-03-21 16:25:27 -07:00
ipc ANDROID: vfs: Add permission2 for filesystems with per mount permissions 2018-12-05 09:48:14 -08:00
kernel UPSTREAM: kernel/sched/psi.c: simplify cgroup_move_task() 2019-03-21 16:25:27 -07:00
lib This is the 4.19.29 stable release 2019-03-13 14:17:29 -07:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm UPSTREAM: psi: pressure stall information for CPU, memory, and IO 2019-03-21 16:25:27 -07:00
net This is the 4.19.30 stable release 2019-03-19 13:24:04 +01:00
samples samples: mei: use /dev/mei0 instead of /dev/mei 2019-02-15 08:10:11 +01:00
scripts This is the 4.19.21 stable release 2019-02-12 20:37:21 +01:00
security This is the 4.19.30 stable release 2019-03-19 13:24:04 +01:00
sound ALSA: hda/realtek: Enable headset MIC of Acer TravelMate X514-51T with ALC255 2019-03-19 13:12:42 +01:00
tools UPSTREAM: delayacct: track delays from thrashing cache pages 2019-03-21 16:25:26 -07:00
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/ 2018-08-22 23:21:44 +09:00
virt kvm: fix kvm_ioctl_create_device() reference counting (CVE-2019-6974) 2019-02-12 19:47:25 +01:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
build.config.cuttlefish.aarch64 ANDROID: Move from clang r346389b to r349610. 2019-02-12 13:23:13 -08:00
build.config.cuttlefish.x86_64 ANDROID: Move from clang r346389b to r349610. 2019-02-12 13:23:13 -08:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS MAINTAINERS: Add Sasha as a stable branch maintainer 2018-12-01 09:37:25 +01:00
Makefile This is the 4.19.30 stable release 2019-03-19 13:24:04 +01:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

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.
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.