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kernel_optimize_test/lib
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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
..
842 lib: 842: no need to check return value of debugfs_create functions 2019-07-03 16:57:17 +02:00
crypto crypto: arc4 - refactor arc4 core code into separate library 2019-06-20 14:18:33 +08:00
dim linux/dim: Implement RDMA adaptive moderation (DIM) 2019-07-08 16:37:21 -03:00
fonts fonts: Prefer a bigger font for high resolution screens 2019-06-20 10:11:24 +02:00
livepatch
lz4 treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
lzo treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
math treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
mpi Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2019-07-05 13:31:19 +09:00
raid6 Kbuild updates for v5.3 2019-07-12 16:03:16 -07:00
reed_solomon rslib: Make some functions static 2019-07-02 08:41:37 +02:00
vdso lib/vdso: Make delta calculation work correctly 2019-06-26 14:26:53 +02:00
xz treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_deflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zlib_inflate treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
zstd treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
.gitignore
argv_split.c
ashldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ashrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
asn1_decoder.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
assoc_array.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
atomic64_test.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
atomic64.c locking/atomic: Use s64 for atomic64 2019-06-03 12:32:56 +02:00
audit.c
bcd.c
bch.c
bitmap.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
bitrev.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
bsearch.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 372 2019-06-05 17:37:10 +02:00
btree.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 431 2019-06-05 17:37:16 +02:00
bucket_locks.c
bug.c
build_OID_registry treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
bust_spinlocks.c
chacha.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
check_signature.c
checksum.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
clz_ctz.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
clz_tab.c
cmdline.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
cmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
compat_audit.c
cpu_rmap.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cpumask.c
crc-ccitt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc-itu-t.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc-t10dif.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc4.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc7.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc8.c
crc16.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
crc32.c
crc32defs.h
crc32test.c
crc64.c
ctype.c
debug_info.c
debug_locks.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
debugobjects.c debugobjects: Move printk out of db->lock critical sections 2019-06-14 14:51:16 +02:00
dec_and_lock.c
decompress_bunzip2.c
decompress_inflate.c
decompress_unlz4.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
decompress_unlzma.c
decompress_unlzo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 95 2019-05-24 17:37:53 +02:00
decompress_unxz.c
decompress.c
devres.c devres: allow const resource arguments 2019-07-05 11:12:07 +09:00
digsig.c 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
dump_stack.c
dynamic_debug.c lib: dynamic_debug: no need to check return value of debugfs_create functions 2019-06-18 13:47:24 +02:00
dynamic_queue_limits.c
earlycpio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 283 2019-06-05 17:36:37 +02:00
error-inject.c
errseq.c
extable.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
fault-inject.c fault-inject: clean up debugfs file creation logic 2019-06-18 13:47:24 +02:00
fdt_empty_tree.c
fdt_ro.c
fdt_rw.c
fdt_strerror.c
fdt_sw.c
fdt_wip.c
fdt.c
find_bit_benchmark.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
find_bit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
flex_proportions.c
gen_crc32table.c
gen_crc64table.c
genalloc.c dma-mapping updates for Linux 5.3 2019-07-12 15:13:55 -07:00
generic-radix-tree.c
glob.c
globtest.c
hexdump.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 501 2019-06-19 17:09:56 +02:00
hweight.c x86/kconfig: Disable CONFIG_GENERIC_HWEIGHT and remove __HAVE_ARCH_SW_HWEIGHT 2019-05-13 11:07:33 +02:00
idr.c idr: Fix idr_get_next race with idr_remove 2019-06-02 23:00:24 -04:00
inflate.c
interval_tree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
interval_tree.c treewide: Add SPDX license identifier for missed files 2019-05-21 10:50:45 +02:00
iomap_copy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 504 2019-06-19 17:09:56 +02:00
iomap.c
iommu-helper.c
ioremap.c
iov_iter.c uio: make import_iovec()/compat_import_iovec() return bytes on success 2019-05-31 15:30:03 -06:00
irq_poll.c
irq_regs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
is_single_threaded.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
jedec_ddr_data.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
kasprintf.c
Kconfig Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2019-07-11 10:55:49 -07:00
Kconfig.debug kbuild: create *.mod with full directory path and remove MODVERDIR 2019-07-18 02:19:31 +09:00
Kconfig.kasan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.kgdb treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Kconfig.ubsan treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
kfifo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
klist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 248 2019-06-19 17:09:08 +02:00
kobject_uevent.c
kobject.c lib : kobject: fix refcount imblance on kobject_rename 2019-06-19 19:27:39 +02:00
kstrtox.c
kstrtox.h
libcrc32c.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
list_debug.c
list_sort.c lib: list_sort.c: add a blank line to avoid kernel-doc warnings 2019-06-20 14:07:34 -06:00
llist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 333 2019-06-05 17:37:06 +02:00
locking-selftest-hardirq.h
locking-selftest-mutex.h
locking-selftest-rlock-hardirq.h
locking-selftest-rlock-softirq.h
locking-selftest-rlock.h
locking-selftest-rsem.h
locking-selftest-rtmutex.h
locking-selftest-softirq.h
locking-selftest-spin-hardirq.h
locking-selftest-spin-softirq.h
locking-selftest-spin.h
locking-selftest-wlock-hardirq.h
locking-selftest-wlock-softirq.h
locking-selftest-wlock.h
locking-selftest-wsem.h
locking-selftest.c
lockref.c lockref: Limit number of cmpxchg loop retries 2019-06-07 13:15:06 -07:00
logic_pio.c
lru_cache.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 91 2019-05-24 17:37:53 +02:00
lshrdi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
Makefile Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2019-07-11 10:55:49 -07:00
memcat_p.c
memory-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
memweight.c
muldi3.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
net_utils.c
netdev-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
nlattr.c
nmi_backtrace.c
nodemask.c
notifier-error-inject.c lib: notifier-error-inject: no need to check return value of debugfs_create functions 2019-07-03 16:57:18 +02:00
notifier-error-inject.h
objagg.c lib: objagg: Use struct_size() in kzalloc() 2019-06-05 19:03:39 -07:00
of-reconfig-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
oid_registry.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36 2019-05-24 17:27:11 +02:00
once.c
packing.c
parman.c
parser.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
pci_iomap.c
percpu_counter.c
percpu_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
percpu-refcount.c Merge branch 'for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu 2019-07-14 16:17:18 -07:00
plist.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 10 2019-05-21 11:28:45 +02:00
pm-notifier-error-inject.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
radix-tree.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153 2019-05-30 11:26:32 -07:00
random32.c lib: Correct comment of prandom_seed 2019-05-17 11:32:47 -07:00
ratelimit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 428 2019-06-05 17:37:16 +02:00
rbtree_test.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
rbtree.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
refcount.c
rhashtable.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
sbitmap.c sbitmap: Replace cmpxchg with xchg 2019-07-01 11:57:12 -06:00
scatterlist.c SCSI sg on 20190709 2019-07-11 15:17:41 -07:00
seq_buf.c
sg_pool.c SCSI sg on 20190709 2019-07-11 15:17:41 -07:00
sg_split.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 230 2019-06-19 17:09:06 +02:00
sha1.c
sha256.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
show_mem.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 435 2019-06-05 17:37:16 +02:00
siphash.c
smp_processor_id.c sched/core: Provide a pointer to the valid CPU mask 2019-06-03 11:49:37 +02:00
sort.c lib/sort.c: fix kernel-doc notation warnings 2019-06-01 15:51:31 -07:00
stackdepot.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
stmp_device.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
string_helpers.c nfsd: escape high characters in binary data 2019-07-03 17:52:50 -04:00
string.c
strncpy_from_user.c
strnlen_user.c
syscall.c
test_bitfield.c
test_bitmap.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_blackhole_dev.c blackhole_dev: add a selftest 2019-07-01 19:34:46 -07:00
test_bpf.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 295 2019-06-05 17:36:38 +02:00
test_debug_virtual.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_firmware.c Char/Misc driver fixes for 5.2-rc4 2019-06-08 12:50:36 -07:00
test_hash.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_hexdump.c
test_ida.c
test_kasan.c lib/test_kasan: Add test for double-kzfree detection 2019-07-12 11:05:42 -07:00
test_kmod.c
test_list_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_memcat_p.c
test_module.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_objagg.c
test_overflow.c
test_parman.c
test_printf.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_rhashtable.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
test_siphash.c
test_sort.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_stackinit.c lib/test_stackinit: Handle Clang auto-initialization pattern 2019-06-05 07:36:43 -07:00
test_static_key_base.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
test_static_keys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
test_string.c treewide: Add SPDX license identifier for more missed files 2019-05-21 10:50:45 +02:00
test_strscpy.c
test_sysctl.c tools/testing/selftests/sysctl/sysctl.sh: add proc_do_large_bitmap() test case 2019-05-14 19:52:51 -07:00
test_ubsan.c
test_user_copy.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
test_uuid.c
test_vmalloc.c lib/test_vmalloc.c:test_func(): eliminate local `ret' 2019-05-14 19:52:49 -07:00
test_xarray.c XArray tests: Add check_insert 2019-06-02 23:00:24 -04:00
test-kstrtox.c
test-string_helpers.c
textsearch.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
timerqueue.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ts_bm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ts_fsm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ts_kmp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ubsan.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ubsan.h
ucmpdi2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120 2019-05-24 17:39:02 +02:00
ucs2_string.c
usercopy.c
uuid.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
vsprintf.c Printk changes for 5.3 2019-07-09 12:25:58 -07:00
win_minmax.c
xarray.c mm: fix page cache convergence regression 2019-05-31 13:52:41 -04:00
xxhash.c