Saravana Kannan 51fae39bd5 scripts/dev-needs: Add script to list device dependencies ... This script can be useful for: - Figuring out the list of modules you need to pack in initrd - Figuring out the list of drivers you need to modularize for a device to be fully functional without building in any dependencies. - Figuring out which drivers to enable first, when porting drivers between kernels (say, to upstream). - Plotting graphs of system dependencies, etc. Usage: dev-needs.sh [-c|-d|-m|-f] [filter options] <list of devices> This script needs to be run on the target device once it has booted to a shell. The script takes as input a list of one or more device directories under /sys/devices and then lists the probe dependency chain (suppliers and parents) of these devices. It does a breadth first search of the dependency chain, so the last entry in the output is close to the root of the dependency chain. By default it lists the full path to the devices under /sys/devices. It also takes an optional modifier flag as the first parameter to change what information is listed in the output. If the requested information is not available, the device name is printed. -c lists the compatible string of the dependencies -d lists the driver name of the dependencies that have probed -m lists the module name of the dependencies that have a module -f list the firmware node path of the dependencies -g list the dependencies as edges and nodes for graphviz -t list the dependencies as edges for tsort The filter options provide a way to filter out some dependencies: --allow-no-driver By default dependencies that don't have a driver attached are ignored. This is to avoid following device links to "class" devices that are created when the consumer probes (as in, not a probe dependency). If you want to follow these links anyway, use this flag. --exclude-devlinks Don't follow device links when tracking probe dependencies. --exclude-parents Don't follow parent devices when tracking probe dependencies. Signed-off-by: Saravana Kannan <saravanak@google.com> Link: https://lore.kernel.org/r/20200901224842.1787825-1-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-09-04 18:19:37 +02:00
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atomic	locking/atomics: Provide the arch_atomic_ interface to generic code	2020-06-25 08:23:22 -07:00
basic	kbuild: introduce hostprogs-always-y and userprogs-always-y	2020-08-10 01:32:59 +09:00
coccinelle	mm, treewide: rename kzfree() to kfree_sensitive()	2020-08-07 11:33:22 -07:00
dtc	kbuild: introduce hostprogs-always-y and userprogs-always-y	2020-08-10 01:32:59 +09:00
dummy-tools	kbuild: add dummy toolchains to enable all cc-option etc. in Kconfig	2020-04-09 00:13:45 +09:00
gcc-plugins	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
gdb	scripts/gdb: fix python 3.8 SyntaxWarning	2020-08-12 10:58:02 -07:00
genksyms	genksyms: keywords: Use __restrict not _restrict	2020-08-18 20:16:46 +09:00
kconfig	kconfig: qconf: replace deprecated QString::sprintf() with QTextStream	2020-08-21 10:23:38 +09:00
ksymoops	…
mod	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
package	kbuild: Replace HTTP links with HTTPS ones	2020-08-10 01:32:59 +09:00
selinux	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
tracing	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
Kbuild.include	kbuild: stop filtering out $(GCC_PLUGINS_CFLAGS) from cc-option base	2020-08-10 01:32:59 +09:00
Kconfig.include	kconfig: unify cc-option and as-option	2020-06-17 10:38:42 +09:00
Lindent	…
Makefile	kbuild: introduce hostprogs-always-y and userprogs-always-y	2020-08-10 01:32:59 +09:00
Makefile.asm-generic	kbuild: force all architectures except um to include mandatory-y	2019-03-17 12:56:32 +09:00
Makefile.build	kbuild: sort hostprogs before passing it to ifneq	2020-08-10 01:32:59 +09:00
Makefile.clean	kbuild: introduce hostprogs-always-y and userprogs-always-y	2020-08-10 01:32:59 +09:00
Makefile.dtbinst	kbuild: refactor Makefile.dtbinst more	2020-03-25 10:19:43 +09:00
Makefile.extrawarn	Makefile.extrawarn: Move sign-compare from W=2 to W=3	2020-08-18 01:52:08 +09:00
Makefile.gcc-plugins	gcc-plugins/stackleak: Use asm instrumentation to avoid useless register saving	2020-06-24 07:48:28 -07:00
Makefile.headersinst	kbuild: move headers_check rule to usr/include/Makefile	2019-11-15 00:23:10 +09:00
Makefile.host	kbuild: sort hostprogs before passing it to ifneq	2020-08-10 01:32:59 +09:00
Makefile.kasan	kasan: allow enabling stack tagging for tag-based mode	2020-08-07 11:33:28 -07:00
Makefile.kcov	kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled	2020-08-10 01:32:59 +09:00
Makefile.kcsan	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
Makefile.lib	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
Makefile.modfinal	kbuild: move modkern_{c,a}flags to Makefile.lib from Makefile.build	2019-08-22 01:14:11 +09:00
Makefile.modinst	kbuild: modinst: read modules.order instead of $(MODVERDIR)/*.mod	2019-07-17 22:39:27 +09:00
Makefile.modpost	kbuild: remove redundant FORCE definition in scripts/Makefile.modpost	2020-08-02 23:09:16 +09:00
Makefile.modsign	kbuild: modsign: read modules.order instead of $(MODVERDIR)/*.mod	2019-07-17 22:39:27 +09:00
Makefile.package	kbuild: fix broken builds because of GZIP,BZIP2,LZOP variables	2020-06-11 20:14:41 +09:00
Makefile.ubsan	kbuild: include scripts/Makefile.* only when relevant CONFIG is enabled	2020-08-10 01:32:59 +09:00
Makefile.userprogs	kbuild: add infrastructure to build userspace programs	2020-05-17 18:52:01 +09:00
adjust_autoksyms.sh	kbuild: split adjust_autoksyms.sh in two parts	2020-03-03 20:49:21 +09:00
asn1_compiler.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36	2019-05-24 17:27:11 +02:00
bin2c.c	…
bloat-o-meter	scripts/bloat-o-meter: Support comparing library archives	2020-08-07 11:33:21 -07:00
bootgraph.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 391	2019-06-05 17:37:11 +02:00
bpf_helpers_doc.py	bpf: Introduce SK_LOOKUP program type with a dedicated attach point	2020-07-17 20:18:16 -07:00
cc-can-link.sh	…
check-sysctl-docs	docs: add a script to check sysctl docs	2020-02-25 03:35:16 -07:00
check_extable.sh	…
checkincludes.pl	…
checkkconfigsymbols.py	kconfig: remove '---help---' support	2020-08-14 13:30:03 +09:00
checkpatch.pl	Kconfig updates for v5.9	2020-08-14 11:04:45 -07:00
checkstack.pl	scripts/checkstack.pl: fix arm sp regex	2020-05-26 00:03:16 +09:00
checksyscalls.sh	checksyscalls: fix up mq_timedreceive and stat exceptions	2019-02-19 21:27:53 +01:00
checkversion.pl	…
clang-version.sh	kbuild: update comment block of scripts/clang-version.sh	2019-03-04 22:34:54 +09:00
cleanfile	…
cleanpatch	…
coccicheck	…
config	scripts/config: allow colons in option strings for sed	2020-04-23 01:10:16 +09:00
const_structs.checkpatch	const_structs.checkpatch: add regulator_ops	2020-08-07 11:33:21 -07:00
decode_stacktrace.sh	scripts/decode_stacktrace.sh: guess path to vmlinux by release name	2020-08-07 11:33:21 -07:00
decodecode	scripts/decodecode: fix trapping instruction formatting	2020-05-07 19:27:20 -07:00
depmod.sh	…
dev-needs.sh	scripts/dev-needs: Add script to list device dependencies	2020-09-04 18:19:37 +02:00
diffconfig	…
documentation-file-ref-check	scripts: documentation-file-ref-check: Add line break before exit	2020-04-15 15:13:13 -06:00
export_report.pl	modpost: move the namespace field in Module.symvers last	2020-03-17 08:59:03 +09:00
extract-cert.c	extract-cert: add static to local data	2020-08-18 20:16:46 +09:00
extract-ikconfig	…
extract-module-sig.pl	…
extract-sys-certs.pl	…
extract-vmlinux	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 378	2019-06-05 17:37:10 +02:00
extract_xc3028.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 339	2019-06-05 17:37:07 +02:00
faddr2line	…
file-size.sh	…
find-unused-docs.sh	scripts/find-unused-docs: Fix massive false positives	2020-01-27 14:25:06 -07:00
gcc-goto.sh	jump_label: move 'asm goto' support test to Kconfig	2019-01-06 09:46:51 +09:00
gcc-ld	…
gcc-plugin.sh	gcc-plugins: drop support for GCC <= 4.7	2020-04-09 00:13:45 +09:00
gcc-version.sh	kbuild: clean up scripts/gcc-version.sh	2019-03-04 22:35:04 +09:00
gcc-x86_32-has-stack-protector.sh	…
gcc-x86_64-has-stack-protector.sh	…
gen_autoksyms.sh	kbuild: generate autoksyms.h early	2020-03-03 20:49:21 +09:00
gen_compile_commands.py	gen_compile_commands: lower the entry count threshold	2019-07-27 12:18:19 +09:00
gen_ksymdeps.sh	kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS	2018-12-01 23:13:14 +09:00
get_abi.pl	doc: ABI scripts: add a SPDX header file	2019-06-21 16:58:37 +02:00
get_dvb_firmware	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61	2019-05-24 17:36:45 +02:00
get_maintainer.pl	get_maintainer: fix unexpected behavior for path/to//file (double slashes)	2020-06-04 19:06:24 -07:00
gfp-translate	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
headerdep.pl	…
headers_check.pl	…
headers_install.sh	Merge branch 'work.fdpic' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-08-07 13:29:39 -07:00
insert-sys-cert.c	…
jobserver-exec	docs, parallelism: Rearrange how jobserver reservations are made	2019-11-22 10:35:18 -07:00
kallsyms.c	KVM: arm64: Add build rules for separate VHE/nVHE object files	2020-07-05 18:37:55 +01:00
kernel-doc	scripts/kernel-doc: optionally treat warnings as errors	2020-07-31 11:11:17 -06:00
ld-version.sh	…
leaking_addresses.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
link-vmlinux.sh	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
makelst	…
markup_oops.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 373	2019-06-05 17:37:10 +02:00
mkcompile_h	kbuild: use CONFIG_CC_VERSION_TEXT to construct LINUX_COMPILER macro	2020-05-12 13:28:33 +09:00
mkmakefile	kbuild: get rid of $(realpath ...) from scripts/mkmakefile	2019-08-29 23:54:29 +09:00
mksysmap	mksysmap: Fix the mismatch of '.L' symbols in System.map	2020-06-06 23:39:20 +09:00
mkuboot.sh	…
module-common.lds	…
modules-check.sh	kbuild: make module name conflict fatal error	2020-05-26 00:03:16 +09:00
namespace.pl	namespace: fix namespace.pl script to support relative paths	2019-10-05 15:29:49 +09:00
nsdeps	scripts: add dummy report mode to add_namespace.cocci	2020-07-10 14:19:58 +02:00
objdiff	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 199	2019-05-30 11:29:23 -07:00
parse-maintainers.pl	parse-maintainers: Do not sort section content by default	2020-03-26 15:08:27 -07:00
patch-kernel	…
profile2linkerlist.pl	…
prune-kernel	…
recordmcount.c	recordmcount: Fix build failure on non arm64	2020-08-10 15:22:06 +01:00
recordmcount.h	recordmcount: support >64k sections	2020-06-16 21:21:00 -04:00
recordmcount.pl	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 166	2019-05-30 11:26:39 -07:00
setlocalversion	scripts: setlocalversion: replace backquote to dollar parenthesis	2019-11-11 20:10:01 +09:00
show_delta	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 438	2019-06-05 17:37:17 +02:00
sign-file.c	…
sorttable.c	s390/kernel: expand exception table logic to allow new handling options	2020-07-20 10:55:50 +02:00
sorttable.h	scripts/sorttable: Implement build-time ORC unwind table sorting	2019-12-13 10:47:58 +01:00
spdxcheck-test.sh	scripts: add spdxcheck.py self test	2018-12-28 12:11:44 -08:00
spdxcheck.py	spdxcheck.py: fix directory structures	2019-06-01 15:51:31 -07:00
spelling.txt	scripts/spelling.txt: add more spellings to spelling.txt	2020-08-07 11:33:21 -07:00
sphinx-pre-install	docs: Don't push Sphinx upgrades quite so readily	2020-06-26 09:31:53 -06:00
split-man.pl	…
stackdelta	…
stackusage	…
subarch.include	…
tags.sh	scripts/tags.sh: collect compiled source precisely	2020-08-07 11:33:21 -07:00
tools-support-relr.sh	scripts/tools-support-relr.sh: un-quote variables	2019-11-13 10:52:05 +00:00
unifdef.c	…
ver_linux	ver_linux: Query ld cache for versions of libc/libcpp run-time	2020-02-10 13:35:15 -08:00
xen-hypercalls.sh	…
xz_wrap.sh	kbuild: add variables for compression tools	2020-06-06 23:42:01 +09:00