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Vladimir Oltean cf304df99f devres: keep both device name and resource name in pretty name 
[ Upstream commit 35bd8c07db ]

Sometimes debugging a device is easiest using devmem on its register
map, and that can be seen with /proc/iomem. But some device drivers have
many memory regions. Take for example a networking switch. Its memory
map used to look like this in /proc/iomem:

1fc000000-1fc3fffff : pcie@1f0000000
  1fc000000-1fc3fffff : 0000:00:00.5
    1fc010000-1fc01ffff : sys
    1fc030000-1fc03ffff : rew
    1fc060000-1fc0603ff : s2
    1fc070000-1fc0701ff : devcpu_gcb
    1fc080000-1fc0800ff : qs
    1fc090000-1fc0900cb : ptp
    1fc100000-1fc10ffff : port0
    1fc110000-1fc11ffff : port1
    1fc120000-1fc12ffff : port2
    1fc130000-1fc13ffff : port3
    1fc140000-1fc14ffff : port4
    1fc150000-1fc15ffff : port5
    1fc200000-1fc21ffff : qsys
    1fc280000-1fc28ffff : ana

But after the patch in Fixes: was applied, the information is now
presented in a much more opaque way:

1fc000000-1fc3fffff : pcie@1f0000000
  1fc000000-1fc3fffff : 0000:00:00.5
    1fc010000-1fc01ffff : 0000:00:00.5
    1fc030000-1fc03ffff : 0000:00:00.5
    1fc060000-1fc0603ff : 0000:00:00.5
    1fc070000-1fc0701ff : 0000:00:00.5
    1fc080000-1fc0800ff : 0000:00:00.5
    1fc090000-1fc0900cb : 0000:00:00.5
    1fc100000-1fc10ffff : 0000:00:00.5
    1fc110000-1fc11ffff : 0000:00:00.5
    1fc120000-1fc12ffff : 0000:00:00.5
    1fc130000-1fc13ffff : 0000:00:00.5
    1fc140000-1fc14ffff : 0000:00:00.5
    1fc150000-1fc15ffff : 0000:00:00.5
    1fc200000-1fc21ffff : 0000:00:00.5
    1fc280000-1fc28ffff : 0000:00:00.5

That patch made a fair comment that /proc/iomem might be confusing when
it shows resources without an associated device, but we can do better
than just hide the resource name altogether. Namely, we can print the
device name _and_ the resource name. Like this:

1fc000000-1fc3fffff : pcie@1f0000000
  1fc000000-1fc3fffff : 0000:00:00.5
    1fc010000-1fc01ffff : 0000:00:00.5 sys
    1fc030000-1fc03ffff : 0000:00:00.5 rew
    1fc060000-1fc0603ff : 0000:00:00.5 s2
    1fc070000-1fc0701ff : 0000:00:00.5 devcpu_gcb
    1fc080000-1fc0800ff : 0000:00:00.5 qs
    1fc090000-1fc0900cb : 0000:00:00.5 ptp
    1fc100000-1fc10ffff : 0000:00:00.5 port0
    1fc110000-1fc11ffff : 0000:00:00.5 port1
    1fc120000-1fc12ffff : 0000:00:00.5 port2
    1fc130000-1fc13ffff : 0000:00:00.5 port3
    1fc140000-1fc14ffff : 0000:00:00.5 port4
    1fc150000-1fc15ffff : 0000:00:00.5 port5
    1fc200000-1fc21ffff : 0000:00:00.5 qsys
    1fc280000-1fc28ffff : 0000:00:00.5 ana

Fixes: 8d84b18f56 ("devres: always use dev_name() in devm_ioremap_resource()")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20200601095826.1757621-1-olteanv@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2020-08-21 13:05:32 +02:00
Documentation dt-bindings: iio: io-channel-mux: Fix compatible string in example code 2020-08-21 13:05:23 +02:00
LICENSES LICENSES: Rename other to deprecated 2019-05-03 06:34:32 -06:00
arch pseries: Fix 64 bit logical memory block panic 2020-08-21 13:05:28 +02:00
block iocost: Fix check condition of iocg abs_vdebt 2020-08-19 08:15:58 +02:00
certs PKCS#7: Refactor verify_pkcs7_signature() 2019-08-05 18:40:18 -04:00
crypto crypto: af_alg - Fix regression on empty requests 2020-08-21 13:05:31 +02:00
drivers USB: serial: ftdi_sio: clean up receive processing 2020-08-21 13:05:31 +02:00
fs orangefs: get rid of knob code... 2020-08-21 13:05:29 +02:00
include crypto: algif_aead - Only wake up when ctx->more is zero 2020-08-21 13:05:30 +02:00
init x86: Fix early boot crash on gcc-10, third try 2020-05-20 08:20:34 +02:00
ipc ipc/util.c: sysvipc_find_ipc() incorrectly updates position index 2020-05-20 08:20:16 +02:00
kernel module: Correctly truncate sysfs sections output 2020-08-21 13:05:28 +02:00
lib devres: keep both device name and resource name in pretty name 2020-08-21 13:05:32 +02:00
mm mm/memory_hotplug: fix unpaired mem_hotplug_begin/done 2020-08-21 13:05:27 +02:00
net mac80211: fix misplaced while instead of if 2020-08-21 13:05:26 +02:00
samples bpf: Fix fds_example SIGSEGV error 2020-08-19 08:16:03 +02:00
scripts recordmcount: only record relocation of type R_AARCH64_CALL26 on arm64. 2020-08-19 08:15:57 +02:00
security Smack: prevent underflow in smk_set_cipso() 2020-08-19 08:16:16 +02:00
sound ALSA: usb-audio: add quirk for Pioneer DDJ-RB 2020-08-19 08:16:27 +02:00
tools selftests/bpf: test_progs use another shell exit on non-actions 2020-08-21 13:05:31 +02:00
usr initramfs: restore default compression behavior 2020-04-08 09:08:38 +02:00
virt KVM: arm64: Don't inherit exec permission across page-table levels 2020-08-05 09:59:51 +02:00
.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: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Modules updates for v5.4 2019-09-22 10:34:46 -07:00
.mailmap ARM: SoC fixes 2019-11-10 13:41:59 -08:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS MAINTAINERS: Remove Simon as Renesas SoC Co-Maintainer 2019-10-10 08:12:51 -07:00
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 MAINTAINERS: Update drm/i915 bug filing URL 2020-02-28 17:22:19 +01:00
Makefile Linux 5.4.59 2020-08-19 08:16:29 +02:00
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.