Masahiro Yamada b7dca6dd1e kbuild: create *.mod with full directory path and remove MODVERDIR ... While descending directories, Kbuild produces objects for modules, but do not link final *.ko files; it is done in the modpost. To keep track of modules, Kbuild creates a *.mod file in $(MODVERDIR) for every module it is building. Some post-processing steps read the necessary information from *.mod files. This avoids descending into directories again. This mechanism was introduced in 2003 or so. Later, commit 551559e13a ("kbuild: implement modules.order") added modules.order. So, we can simply read it out to know all the modules with directory paths. This is easier than parsing the first line of *.mod files. $(MODVERDIR) has a flat directory structure, that is, *.mod files are named only with base names. This is based on the assumption that the module name is unique across the tree. This assumption is really fragile. Stephen Rothwell reported a race condition caused by a module name conflict: https://lkml.org/lkml/2019/5/13/991 In parallel building, two different threads could write to the same $(MODVERDIR)/*.mod simultaneously. Non-unique module names are the source of all kind of troubles, hence commit 3a48a91901 ("kbuild: check uniqueness of module names") introduced a new checker script. However, it is still fragile in the build system point of view because this race happens before scripts/modules-check.sh is invoked. If it happens again, the modpost will emit unclear error messages. To fix this issue completely, create *.mod with full directory path so that two threads never attempt to write to the same file. $(MODVERDIR) is no longer needed. Since modules with directory paths are listed in modules.order, Kbuild is still able to find *.mod files without additional descending. I also killed cmd_secanalysis; scripts/mod/sumversion.c computes MD4 hash for modules with MODULE_VERSION(). When CONFIG_DEBUG_SECTION_MISMATCH=y, it occurs not only in the modpost stage, but also during directory descending, where sumversion.c may parse stale *.mod files. It would emit 'No such file or directory' warning when an object consisting a module is renamed, or when a single-obj module is turned into a multi-obj module or vice versa. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Nicolas Pitre <nico@fluxnic.net>		2019-07-18 02:19:31 +09:00
..
ABI	Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-07-15 21:10:39 -07:00
EDID	docs: EDID/HOWTO.txt: convert it and rename to howto.rst	2019-06-14 14:32:29 -06:00
PCI	Documentation: PCI: convert endpoint/pci-test-howto.txt to reST	2019-05-30 17:54:34 -05:00
RCU	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
accelerators	docs: mark orphan documents as such	2019-06-08 13:42:11 -06:00
accounting	psi: introduce psi monitor	2019-05-14 19:52:48 -07:00
acpi/dsd	docs: fix broken documentation links	2019-06-08 13:42:13 -06:00
admin-guide	for-linus-20190715	2019-07-15 21:20:52 -07:00
aoe	docs: aoe: convert docs to ReST and rename to *.rst	2019-06-14 14:20:22 -06:00
arm	docs: mark orphan documents as such	2019-06-08 13:42:11 -06:00
arm64	ARM:	2019-07-12 15:35:14 -07:00
auxdisplay	…
backlight	…
block	block: Remove unused definitions	2019-07-10 14:18:01 -06:00
blockdev	zram: idle writeback fixes and cleanup	2019-01-08 17:15:10 -08:00
bpf	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
bus-devices	…
cdrom	docs: ide: convert docs to ReST and rename to *.rst	2019-06-14 14:21:18 -06:00
cgroup-v1	for-5.3/block-20190708	2019-07-09 10:45:06 -07:00
cma	…
connector	…
console	Documentation: corrections to console/console.txt	2018-08-10 16:09:40 -06:00
core-api	asm-generic, x86: add bitops instrumentation for KASAN	2019-07-12 11:05:42 -07:00
cpu-freq	docs: power: convert docs to ReST and rename to *.rst	2019-06-14 16:08:36 -05:00
crypto	crypto: doc - Fix formatting of new crypto engine content	2019-07-03 22:13:12 +08:00
dev-tools	docs: kmemleak: add more documentation details	2019-07-12 11:05:42 -07:00
device-mapper	- Add encrypted byte-offset initialization vector (eboiv) to DM crypt.	2019-07-13 15:24:31 -07:00
devicetree	Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-07-15 21:10:39 -07:00
doc-guide	Doc : doc-guide : Fix a typo	2019-06-28 09:04:14 -06:00
driver-api	pci-v5.3-changes	2019-07-15 20:44:49 -07:00
driver-model	docs: driver-model: convert docs to ReST and rename to *.rst	2019-06-21 15:47:26 +02:00
early-userspace	Correct gen_init_cpio tool's documentation	2018-11-25 12:25:53 -07:00
fault-injection	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
fb	drm main pull request for v5.3-rc1 (sans mm changes)	2019-07-15 19:04:27 -07:00
features	Documentation/stackprotector: powerpc supports stack protector	2019-06-14 14:44:43 -06:00
filesystems	f2fs-for-5.3-rc1	2019-07-12 17:28:24 -07:00
firmware-guide	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
firmware_class	…
fpga	docs: fpga: convert docs to ReST and rename to *.rst	2019-06-14 14:21:15 -06:00
gpio	docs: gpio: convert docs to ReST and rename to *.rst	2019-04-23 23:30:07 +02:00
gpu	drm main pull request for v5.3-rc1 (sans mm changes)	2019-07-15 19:04:27 -07:00
hid	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/hid/hid	2019-07-11 15:32:11 -07:00
hwmon	Driver Core and debugfs changes for 5.3-rc1	2019-07-12 12:24:03 -07:00
i2c	Merge branch 'i2c/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux	2019-07-15 21:10:39 -07:00
ia64	…
ide	docs: ide: convert docs to ReST and rename to *.rst	2019-06-14 14:21:18 -06:00
iio	docs: iio: convert to ReST	2019-06-22 10:41:57 +01:00
infiniband	docs: infiniband: add it to the driver-api bookset	2019-07-08 14:22:56 -03:00
input	docs: hid: convert to ReST	2019-07-02 10:19:34 +02:00
interconnect	docs: mark orphan documents as such	2019-06-08 13:42:11 -06:00
ioctl	platform/x86: ISST: Update ioctl-number.txt for Intel Speed Select interface	2019-07-02 18:41:16 +03:00
isdn	isdn: remove isdn4linux	2019-05-31 11:13:10 +02:00
kbuild	kbuild: get rid of misleading $(AS) from documents	2019-07-17 22:37:51 +09:00
kdump	docs: kdump: convert docs to ReST and rename to *.rst	2019-06-14 14:21:24 -06:00
kernel-hacking	docs: stop suggesting strlcpy	2019-06-20 14:08:49 -06:00
laptops	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
leds	docs: leds: convert to ReST	2019-06-28 20:57:31 +02:00
lightnvm	…
livepatch	docs/livepatch: Unify style of livepatch documentation in the ReST format	2019-05-07 16:06:28 -06:00
locking	locking/lockdep: Add explanation to lock usage rules in lockdep design doc	2019-06-03 11:55:48 +02:00
m68k	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
maintainer	docs: Add a document on repository management	2019-06-18 09:33:16 -06:00
md	…
media	media: doc-rst: Fix typos	2019-06-27 07:35:47 -04:00
memory-devices	…
mic	docs: mic: convert docs to ReST and rename to *.rst	2019-06-14 14:23:26 -06:00
mips	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
misc-devices	docs: misc-devices: convert files without extension to ReST	2019-07-03 21:09:41 +02:00
mmc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
mtd	Documentation: mtd: remove stale pxa3xx NAND controller documentation	2018-09-04 23:37:38 +02:00
namespaces	…
netlabel	docs: netlabel: convert docs to ReST and rename to *.rst	2019-06-14 14:23:30 -06:00
networking	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2019-07-11 10:55:49 -07:00
nfc	…
nios2	…
nvdimm	Documentation: nvdimm: Fix typo	2019-06-07 11:39:04 -06:00
nvmem	Documentation: nvmem: document cell tables and lookup entries	2018-09-28 15:14:54 +02:00
openrisc	…
parisc	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
pcmcia	docs: pcmcia: convert docs to ReST and rename to *.rst	2019-06-14 14:23:35 -06:00
perf	Documentation: perf: Add documentation for ThunderX2 PMU uncore driver	2018-12-06 12:29:47 +00:00
phy	…
power	power supply and reset changes for the v5.3 series	2019-07-15 21:06:15 -07:00
powerpc	powerpc updates for 5.3	2019-07-13 16:08:36 -07:00
process	pci-v5.3-changes	2019-07-15 20:44:49 -07:00
pti	…
rapidio	…
riscv	docs: riscv: convert docs to ReST and rename to *.rst	2019-06-14 14:31:32 -06:00
s390	docs: s390: s390dbf: typos and formatting, update crash command	2019-07-05 13:42:24 +02:00
scheduler	pci-v5.3-changes	2019-07-15 20:44:49 -07:00
scsi	scsi: ufs: Documentation: Announce ufs-tool v1.0	2019-06-26 22:47:51 -04:00
security	Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"	2019-07-10 18:43:43 -07:00
serial	docs: serial: convert docs to ReST and rename to *.rst	2019-04-25 11:37:42 +02:00
sh	sh: remove board_time_init() callback	2018-12-18 16:13:04 +01:00
sound	ALSA: doc: my_chip has no element ioport	2019-04-03 11:55:47 +02:00
sparc	docs: sparc: convert to ReST	2019-05-08 17:13:35 -07:00
sphinx	docs: automarkup.py: ignore exceptions when seeking for xrefs	2019-07-08 14:35:47 -06:00
sphinx-static	docs: improve readability for people with poorer eyesight	2018-10-07 09:16:50 -06:00
spi	spi-summary: document set_cs_timing	2019-04-08 14:13:43 +07:00
sysctl	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
target	docs: target: convert docs to ReST and rename to *.rst	2019-06-14 14:31:36 -06:00
thermal	docs: hwmon: Add an index file and rename docs to *.rst	2019-04-17 10:37:23 -07:00
timers	docs: timers: convert docs to ReST and rename to *.rst	2019-06-14 14:31:48 -06:00
trace	pci-v5.3-changes	2019-07-15 20:44:49 -07:00
translations	pci-v5.3-changes	2019-07-15 20:44:49 -07:00
usb	docs: usb: rename files to .rst and add them to drivers-api	2019-06-20 14:28:36 +02:00
userspace-api	Documentation: Add section about CPU vulnerabilities for Spectre	2019-06-26 11:42:41 -06:00
virtual	ARM:	2019-07-12 15:35:14 -07:00
vm	HMM patches for 5.3	2019-07-14 19:42:11 -07:00
w1	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00
watchdog	docs: watchdog: convert docs to ReST and rename to *.rst	2019-06-14 14:32:05 -06:00
wimax	…
x86	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
xilinx	docs: xilinx: convert eemi.txt to eemi.rst	2019-06-14 14:32:10 -06:00
xtensa	xtensa: document boot parameter passing	2019-02-03 18:06:19 -08:00
.gitignore	…
Changes	…
CodingStyle	…
DMA-API-HOWTO.txt	DMA mapping updates for 5.2	2019-05-09 08:40:55 -07:00
DMA-API.txt	Documentation: DMA-API: fix a function name of max_mapping_size	2019-06-07 11:10:33 -06:00
DMA-ISA-LPC.txt	Documentation/DMA-ISA-LPC: fix an incorrect reference	2019-02-11 08:23:07 -07:00
DMA-attributes.txt	…
IPMI.txt	…
IRQ-affinity.txt	…
IRQ-domain.txt	…
IRQ.txt	…
Intel-IOMMU.txt	…
Kconfig	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
Makefile	docs: Kbuild/Makefile: allow check for missing docs at build time	2019-06-07 11:33:16 -06:00
SAK.txt	…
SM501.txt	…
SubmittingPatches	…
atomic_bitops.txt	docs: atomic_bitops.txt: add a title for this document	2019-04-11 12:37:02 -06:00
atomic_t.txt	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2019-07-08 16:12:03 -07:00
bt8xxgpio.txt	…
btmrvl.txt	…
bus-virt-phys-mapping.txt	…
clearing-warn-once.txt	A reasonably busy cycle for docs, including:	2019-05-08 12:42:50 -07:00
conf.py	Disable Sphinx SmartyPants in HTML output	2019-06-30 15:30:34 -06:00
cpu-load.txt	…
cputopology.txt	topology: Create core_cpus and die_cpus sysfs attributes	2019-05-23 10:08:34 +02:00
crc32.txt	…
dcdbas.txt	…
debugging-modules.txt	…
debugging-via-ohci1394.txt	…
dell_rbu.txt	…
digsig.txt	…
docutils.conf	doc-rst: Add missing newline at end of file	2019-06-20 14:16:56 -06:00
dontdiff	kbuild: create *.mod with full directory path and remove MODVERDIR	2019-07-18 02:19:31 +09:00
efi-stub.txt	efi_stub: update documentation on dtb= parameter	2018-09-09 14:46:44 -06:00
eisa.txt	docs: driver-model: convert docs to ReST and rename to *.rst	2019-06-21 15:47:26 +02:00
futex-requeue-pi.txt	…
gcc-plugins.txt	…
highuid.txt	…
hw_random.txt	…
hwspinlock.txt	…
index.rst	pci-v5.3-changes	2019-07-15 20:44:49 -07:00
intel_txt.txt	…
io-mapping.txt	…
io_ordering.txt	…
iostats.txt	block: document iostat changes for disk busy time accounting	2019-06-14 14:46:43 -06:00
irqflags-tracing.txt	…
isa.txt	…
isapnp.txt	…
kernel-per-CPU-kthreads.txt	docs: watchdog: convert docs to ReST and rename to *.rst	2019-06-14 14:32:05 -06:00
kobject.txt	kref/kobject: Improve documentation	2018-12-06 13:57:03 +01:00
kprobes.txt	Merge branch 'parisc-5.2-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux	2019-05-07 19:34:17 -07:00
kref.txt	…
ldm.txt	…
lockup-watchdogs.txt	…
logo.gif	…
logo.txt	…
lsm.txt	…
lzo.txt	lib/lzo: fix bugs for very short or empty input	2019-04-05 16:02:30 -10:00
mailbox.txt	…
memory-barriers.txt	It's been a relatively busy cycle for docs:	2019-07-09 12:34:26 -07:00
men-chameleon-bus.txt	…
nommu-mmap.txt	Documentation: nommu-map: Fix duplicate word typo	2018-06-26 09:01:27 -06:00
ntb.txt	docs: ntb.txt: add blank lines to clean up some Sphinx warnings	2019-04-11 12:37:03 -06:00
numastat.txt	…
packing.txt	lib: Add support for generic packing operations	2019-05-03 10:49:17 -04:00
padata.txt	…
parport-lowlevel.txt	…
percpu-rw-semaphore.txt	…
phy.txt	…
pi-futex.txt	…
pnp.txt	…
preempt-locking.txt	x86/fpu: Remove fpu__restore()	2019-04-09 19:27:42 +02:00
pwm.txt	pwm: Add power management descriptions	2019-06-26 11:39:11 +02:00
rbtree.txt	…
remoteproc.txt	…
rfkill.txt	rfkill: Fix several typos in documentation	2018-06-15 13:36:08 +02:00
robust-futex-ABI.txt	…
robust-futexes.txt	futex: Update comments and docs about return values of arch futex code	2019-04-26 13:57:55 +01:00
rpmsg.txt	…
rtc.txt	Documentation: rtc: Correct location of rtctest.c	2019-03-25 10:34:55 -06:00
sgi-ioc4.txt	…
siphash.txt	…
smsc_ece1099.txt	…
speculation.txt	docs: speculation.txt: mark example blocks as such	2019-04-11 12:37:03 -06:00
static-keys.txt	static_keys.txt: Fix trivial spelling mistake	2019-02-06 16:44:16 -07:00
svga.txt	…
switchtec.txt	NTB: switchtec_ntb: Update switchtec documentation with prerequisites for NTB	2018-10-11 11:28:53 -05:00
sync_file.txt	…
tee.txt	Documentation: tee: Grammar s/the its/its/	2019-06-07 11:23:38 -06:00
this_cpu_ops.txt	…
unaligned-memory-access.txt	docs: unaligned-memory-access.txt: use a lowercase title	2019-04-11 12:37:03 -06:00
vfio-mediated-device.txt	vfio/mdev: Check globally for duplicate devices	2018-06-08 10:24:27 -06:00
vfio.txt	…
video-output.txt	docs: video-output.txt: convert it to ReST format	2019-04-11 12:37:03 -06:00
xillybus.txt	…
xz.txt	…
zorro.txt	…