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Rafael J. Wysocki 722e5f2b1e driver core: Partially revert "driver core: correct device's shutdown order" Commit `52cdbdd498` (driver core: correct device's shutdown order) introduced a regression by breaking device shutdown on some systems. Namely, the devices_kset_move_last() call in really_probe() added by that commit is a mistake as it may cause parents to follow children in the devices_kset list which then causes shutdown to fail. For example, if a device has children before really_probe() is called for it (which is not uncommon), that call will cause it to be reordered after the children in the devices_kset list and the ordering of that list will not reflect the correct device shutdown order any more. Also it causes the devices_kset list to be constantly reordered until all drivers have been probed which is totally pointless overhead in the majority of cases and it only covered an issue with system shutdown, while system-wide suspend/resume potentially had the same issue on the affected platforms (which was not covered). Moreover, the shutdown issue originally addressed by the change in really_probe() made by commit `52cdbdd498` is not present in 4.18-rc any more, since dra7 started to use the sdhci-omap driver which doesn't disable any regulators during shutdown, so the really_probe() part of commit `52cdbdd498` can be safely reverted. [The original issue was related to the omap_hsmmc driver used by dra7 previously.] For the above reasons, revert the really_probe() modifications made by commit `52cdbdd498`. The other code changes made by commit `52cdbdd498` are useful and they need not be reverted. Fixes: `52cdbdd498` (driver core: correct device's shutdown order) Link: https://lore.kernel.org/lkml/CAFgQCTt7VfqM=UyCnvNFxrSw8Z6cUtAi3HUwR4_xPAc03SgHjQ@mail.gmail.com/ Reported-by: Pingfan Liu <kernelfans@gmail.com> Tested-by: Pingfan Liu <kernelfans@gmail.com> Reviewed-by: Kishon Vijay Abraham I <kishon@ti.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-07-10 17:47:43 +02:00
arch	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-24 20:29:15 +08:00
block	for-linus-20180623	2018-06-24 06:33:54 +08:00
certs	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2018-06-24 06:31:54 +08:00
Documentation	This contains a few fixes and a clean up.	2018-06-24 06:23:28 +08:00
drivers	driver core: Partially revert "driver core: correct device's shutdown order"	2018-07-10 17:47:43 +02:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	\n	2018-06-22 18:04:56 +09:00
include	Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-24 20:18:19 +08:00
init	dma-mapping: move all DMA mapping code to kernel/dma	2018-06-14 08:50:37 +02:00
ipc	ipc: use new return type vm_fault_t	2018-06-15 07:55:25 +09:00
kernel	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-24 20:29:15 +08:00
lib	Merge branch 'locking-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-24 19:36:16 +08:00
LICENSES	LICENSES: Add Linux-OpenIB license text	2018-04-27 16:41:53 -06:00
mm	for-linus-20180623	2018-06-24 06:33:54 +08:00
net	NFS client bugfixes for Linux 4.18	2018-06-22 06:21:34 +09:00
samples	VFIO updates for v4.18	2018-06-12 13:11:26 -07:00
scripts	tracing: Fix SKIP_STACK_VALIDATION=1 build due to bad merge with -mrecord-mcount	2018-06-21 15:12:56 -04:00
security	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
sound	docs: Fix some broken references	2018-06-15 18:10:01 -03:00
tools	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-24 20:29:15 +08:00
usr	kbuild: rename built-in.o to built-in.a	2018-03-26 02:01:19 +09:00
virt	KVM: arm64: Prevent KVM_COMPAT from being selected	2018-06-21 17:17:50 +01:00
.clang-format	clang-format: add configuration file	2018-04-11 10:28:35 -07:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	Kbuild updates for v4.17 (2nd)	2018-04-15 17:21:30 -07:00
.mailmap	Merge branch 'asoc-4.17' into asoc-4.18 for compress dependencies	2018-04-26 12:24:28 +01:00
COPYING	COPYING: use the new text with points to the license files	2018-03-23 12:41:45 -06:00
CREDITS	MAINTAINERS/CREDITS: Drop METAG ARCHITECTURE	2018-03-05 16:34:24 +00:00
Kbuild
Kconfig	kconfig: add basic helper macros to scripts/Kconfig.include	2018-05-29 03:31:19 +09:00
MAINTAINERS	Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-06-24 19:59:52 +08:00
Makefile	Linux 4.18-rc2	2018-06-24 20:54:29 +08:00
README	Docs: Added a pointer to the formatted docs to README	2018-03-21 09:02:53 -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.
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.