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35feb60474bf4f7fa7840e14fc7fd344996b919d
linux/lib
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Paul E. McKenney 35feb60474 kernel/smp: Provide CSD lock timeout diagnostics 
This commit causes csd_lock_wait() to emit diagnostics when a CPU
fails to respond quickly enough to one of the smp_call_function()
family of function calls.  These diagnostics are enabled by a new
CSD_LOCK_WAIT_DEBUG Kconfig option that depends on DEBUG_KERNEL.

This commit was inspired by an earlier patch by Josef Bacik.

[ paulmck: Fix for syzbot+0f719294463916a3fc0e@syzkaller.appspotmail.com ]
[ paulmck: Fix KASAN use-after-free issue reported by Qian Cai. ]
[ paulmck: Fix botched nr_cpu_ids comparison per Dan Carpenter. ]
[ paulmck: Apply Peter Zijlstra feedback. ]
Link: https://lore.kernel.org/lkml/00000000000042f21905a991ecea@google.com
Link: https://lore.kernel.org/lkml/0000000000002ef21705a9933cf3@google.com
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
2020-09-04 11:52:50 -07:00
..
842
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
crypto
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
dim
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
fonts
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
kunit
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
livepatch
Merge tag 'kbuild-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2020-08-09 14:10:26 -07:00
lz4
lz4: fix kernel decompression speed
2020-08-14 19:56:56 -07:00
lzo
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
math
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00
mpi
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
pldmfw
Add pldmfw library for PLDM firmware update
2020-07-28 17:07:06 -07:00
raid6
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
reed_solomon
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
vdso
vdso/treewide: Add vdso_data pointer argument to __arch_get_hw_counter()
2020-08-06 10:57:30 +02:00
xz
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00
zlib_deflate
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
zlib_dfltcc
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
zlib_inflate
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
zstd
kbuild: trace functions in subdirectories of lib/
2020-08-10 01:32:59 +09:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
argv_split.c
…
ashldi3.c
…
ashrdi3.c
…
asn1_decoder.c
…
assoc_array.c
…
atomic64_test.c
…
atomic64.c
…
audit.c
…
bcd.c
…
bch.c
lib/bch: Allow easy bit swapping
2020-05-24 20:48:11 +02:00
bitmap.c
lib/bitmap.c: fix bitmap_cut() for partial overlapping case
2020-08-12 10:57:59 -07:00
bitrev.c
…
bootconfig.c
lib/bootconfig: Add override operator support
2020-08-03 16:22:28 -04:00
bsearch.c
lib/bsearch: Provide __always_inline variant
2020-06-11 15:14:53 +02:00
btree.c
…
bucket_locks.c
…
bug.c
ftrace,bug: Improve traceoff_on_warn
2020-06-01 08:23:42 -04:00
build_OID_registry
…
bust_spinlocks.c
…
check_signature.c
…
checksum.c
arch, net: remove the last csum_partial_copy() leftovers
2020-07-20 17:45:32 -07:00
clz_ctz.c
…
clz_tab.c
…
cmdline.c
…
cmpdi2.c
…
compat_audit.c
…
cpu_rmap.c
lib: cpu_rmap: Use pr_warn instead of pr_warning
2019-10-18 15:01:57 +02:00
cpumask.c
lib: Restrict cpumask_local_spread to houskeeping CPUs
2020-07-08 11:39:01 +02:00
crc4.c
…
crc7.c
…
crc8.c
…
crc16.c
…
crc32.c
docs: move remaining stuff under Documentation/*.txt to Documentation/staging
2020-06-19 14:17:05 -06:00
crc32defs.h
…
crc32test.c
…
crc64.c
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00
crc-ccitt.c
…
crc-itu-t.c
…
crc-t10dif.c
crc-t10dif: clean up some more things
2020-06-18 17:26:43 +10:00
ctype.c
…
debug_info.c
…
debug_locks.c
lockdep: Prepare for noinstr sections
2020-05-19 15:47:21 +02:00
debugobjects.c
debugobjects: Convert to DEFINE_SHOW_ATTRIBUTE
2020-07-17 23:25:46 +02:00
dec_and_lock.c
…
decompress_bunzip2.c
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00
decompress_inflate.c
lib/zlib: add s390 hardware support for kernel zlib_inflate
2020-01-31 10:30:40 -08:00
decompress_unlz4.c
…
decompress_unlzma.c
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00
decompress_unlzo.c
…
decompress_unxz.c
…
decompress_unzstd.c
lib: Add zstd support to decompress
2020-07-31 11:49:08 +02:00
decompress.c
lib: Add zstd support to decompress
2020-07-31 11:49:08 +02:00
devres.c
lib: devres: add a comment about the devm_of_iomap() function
2020-07-10 14:15:55 +02:00
digsig.c
…
dump_stack.c
kernel: rename show_stack_loglvl() => show_stack()
2020-06-09 09:39:13 -07:00
dynamic_debug.c
dyndbg: export ddebug_exec_queries
2020-07-24 17:00:10 +02:00
dynamic_queue_limits.c
…
earlycpio.c
…
errname.c
printf: add support for printing symbolic error names
2019-10-17 16:23:25 +02:00
error-inject.c
…
errseq.c
…
extable.c
lib/extable.c: add missing prototypes
2019-09-25 17:51:39 -07:00
fault-inject.c
fault_inject: Don't rely on "return value" from WRITE_ONCE()
2020-04-15 21:36:41 +01:00
fdt_addresses.c
libfdt: include fdt_addresses.c
2020-01-08 16:59:19 +00:00
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
…
find_bit.c
lib/find_bit.c: uninline helper _find_next_bit()
2020-01-31 10:30:41 -08:00
flex_proportions.c
lib/flex_proportions.c: cleanup __fprop_inc_percpu_max
2020-06-04 19:06:25 -07:00
gen_crc32table.c
…
gen_crc64table.c
…
genalloc.c
lib/genalloc.c: rename addr_in_gen_pool to gen_pool_has_addr
2019-12-04 19:44:13 -08:00
generic-radix-tree.c
lib/generic-radix-tree.c: add kmemleak annotations
2019-10-14 15:04:00 -07:00
glob.c
…
globtest.c
…
hexdump.c
lib/hexdump: make print_hex_dump_bytes() a nop on !DEBUG builds
2019-09-25 17:51:39 -07:00
hweight.c
…
idr.c
idr: Fix idr_get_next_ul race with idr_remove
2019-11-01 22:26:34 -04:00
inflate.c
…
interval_tree_test.c
…
interval_tree.c
…
iomap_copy.c
…
iomap.c
iomap: constify ioreadX() iomem argument (as in generic implementation)
2020-08-14 19:56:57 -07:00
iommu-helper.c
…
iov_iter.c
iov_iter: Move unnecessary inclusion of crypto/hash.h
2020-06-30 09:34:23 -04:00
irq_poll.c
…
irq_regs.c
…
is_single_threaded.c
…
kasprintf.c
…
Kconfig
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
2020-08-05 20:13:21 -07:00
Kconfig.debug
kernel/smp: Provide CSD lock timeout diagnostics
2020-09-04 11:52:50 -07:00
Kconfig.kasan
kasan: update required compiler versions in documentation
2020-08-07 11:33:28 -07:00
Kconfig.kcsan
kcsan: Re-add GCC as a supported compiler
2020-06-29 12:04:48 -07:00
Kconfig.kgdb
kgdb: enable arch to support XML packet.
2020-07-09 20:09:28 -07:00
Kconfig.ubsan
ubsan, kcsan: Don't combine sanitizer with kcov on clang
2020-06-11 20:03:59 +02:00
kfifo.c
Partially revert "kfifo: fix kfifo_alloc() and kfifo_init()"
2019-08-30 18:47:15 -07:00
klist.c
…
kobject_uevent.c
…
kobject.c
kobject: Avoid premature parent object freeing in kobject_cleanup()
2020-07-10 14:14:37 +02:00
kstrtox.c
kstrto*: do not describe simple_strto*() as obsolete/replaced
2020-08-12 10:58:00 -07:00
kstrtox.h
…
libcrc32c.c
…
linear_ranges.c
lib: linear_ranges: Add missing MODULE_LICENSE()
2020-05-11 11:55:28 +01:00
list_debug.c
…
list_sort.c
…
list-test.c
Fix linked-list KUnit test when run multiple times
2020-03-25 16:38:39 -06:00
llist.c
…
locking-selftest-hardirq.h
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locking-selftest-mutex.h
…
locking-selftest-rlock-hardirq.h
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locking-selftest-rlock-softirq.h
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locking-selftest-rlock.h
…
locking-selftest-rsem.h
…
locking-selftest-rtmutex.h
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locking-selftest-softirq.h
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locking-selftest-spin-hardirq.h
…
locking-selftest-spin-softirq.h
…
locking-selftest-spin.h
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locking-selftest-wlock-hardirq.h
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locking-selftest-wlock-softirq.h
…
locking-selftest-wlock.h
…
locking-selftest-wsem.h
…
locking-selftest.c
locking/lockdep: Remove unused @nested argument from lock_release()
2019-10-09 12:46:10 +02:00
lockref.c
…
logic_pio.c
logic_pio: Use _inX() and _outX()
2020-05-07 14:54:26 +08:00
lru_cache.c
…
lshrdi3.c
…
Makefile
lib/test_bits.c: add tests of GENMASK
2020-08-12 10:58:00 -07:00
memcat_p.c
…
memory-notifier-error-inject.c
…
memregion.c
lib: Uplevel the pmem "region" ida to a global allocator
2019-11-07 15:44:29 +01:00
memweight.c
…
muldi3.c
…
net_utils.c
…
netdev-notifier-error-inject.c
…
nlattr.c
netlink: factor out policy range helpers
2020-04-30 17:51:42 -07:00
nmi_backtrace.c
lib: Add backtrace_idle parameter to force backtrace of idle CPUs
2020-08-24 14:24:25 -07:00
nodemask.c
…
notifier-error-inject.c
…
notifier-error-inject.h
…
objagg.c
lib: objagg: Replace zero-length arrays with flexible-array member
2020-02-16 18:33:00 -08:00
of-reconfig-notifier-error-inject.c
…
oid_registry.c
…
once.c
…
packing.c
lib: packing: add documentation for pbuflen argument
2020-06-28 20:45:27 -07:00
parman.c
…
parser.c
…
pci_iomap.c
…
percpu_counter.c
percpu_counter: add percpu_counter_sync()
2020-08-07 11:33:26 -07:00
percpu_test.c
…
percpu-refcount.c
lib/percpu-refcount.c: use a more common logging style
2020-06-04 19:06:25 -07:00
plist.c
…
pm-notifier-error-inject.c
…
radix-tree.c
treewide: Remove uninitialized_var() usage
2020-07-16 12:35:15 -07:00
random32.c
random32: add a tracepoint for prandom_u32()
2020-08-13 15:11:14 -07:00
ratelimit.c
…
rbtree_test.c
augmented rbtree: add new RB_DECLARE_CALLBACKS_MAX macro
2019-09-25 17:51:39 -07:00
rbtree.c
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00
refcount.c
locking/refcount: Consolidate implementations of refcount_t
2019-11-25 09:15:32 +01:00
rhashtable.c
rhashtable: Restore RCU marking on rhash_lock_head
2020-07-28 17:09:49 -07:00
sbitmap.c
sbitmap: Consider cleared bits in sbitmap_bitmap_show()
2020-07-01 10:53:00 -06:00
scatterlist.c
lib/scatterlist: fix sg_copy_buffer() kerneldoc
2020-04-07 10:43:43 -07:00
seq_buf.c
seq_buf: Export seq_buf_printf
2020-06-15 18:22:43 -07:00
sg_pool.c
…
sg_split.c
lib: scatterlist: Fix to support no mapped sg
2019-08-08 07:45:01 -06:00
sha1.c
crypto: lib/sha1 - fold linux/cryptohash.h into crypto/sha.h
2020-05-08 15:32:17 +10:00
show_mem.c
mm: remove quicklist page table caches
2019-09-24 15:54:09 -07:00
siphash.c
…
smp_processor_id.c
lib/smp_processor_id: Move it into noinstr section
2020-06-11 15:14:36 +02:00
sort.c
lib/sort: Move swap, cmp and cmp_r function types for wider use
2019-11-14 13:15:11 -05:00
stackdepot.c
kasan: stackdepot: move filter_irq_stacks() to stackdepot.c
2020-04-07 10:43:43 -07:00
stmp_device.c
…
string_helpers.c
lib/string_helpers: fix some kerneldoc warnings
2019-07-16 19:23:22 -07:00
string.c
lib/string.c: update match_string() doc-strings with correct behavior
2020-02-21 11:22:15 -08:00
strncpy_from_user.c
lib: Add might_fault() to strncpy_from_user.
2020-06-04 19:06:25 -07:00
strnlen_user.c
uaccess: Selectively open read or write user access
2020-05-01 12:35:21 +10:00
syscall.c
…
test_bitfield.c
…
test_bitmap.c
lib/test_bitmap.c: add test for bitmap_cut()
2020-08-12 10:57:59 -07:00
test_bitops.c
lib/test_bitops: do the full test during module init
2020-08-12 10:57:59 -07:00
test_bits.c
lib/test_bits.c: add tests of GENMASK
2020-08-12 10:58:00 -07:00
test_blackhole_dev.c
…
test_bpf.c
bpf: revert "test_bpf: Flag tests that cannot be jited on s390"
2020-07-16 20:52:43 +02:00
test_debug_virtual.c
…
test_firmware.c
Revert "test_firmware: Test platform fw loading on non-EFI systems"
2020-07-27 12:14:28 +02:00
test_fpu.c
selftests/fpu: Add an FPU selftest
2020-06-29 10:02:23 +02:00
test_hash.c
…
test_hexdump.c
…
test_hmm_uapi.h
mm/hmm: add tests for hmm_pfn_to_map_order()
2020-07-10 16:24:28 -03:00
test_hmm.c
mm/hmm/test: use the new migration invalidation
2020-07-28 16:20:33 -03:00
test_ida.c
…
test_kasan.c
kasan: adjust kasan_stack_oob for tag-based mode
2020-08-07 11:33:28 -07:00
test_kmod.c
test_kmod: avoid potential double free in trigger_config_run_type()
2020-08-12 10:58:01 -07:00
test_linear_ranges.c
lib/test_linear_ranges: add a test for the 'linear_ranges'
2020-05-08 18:18:12 +01:00
test_list_sort.c
…
test_lockup.c
lib/test_lockup.c: fix return value of test_lockup_init()
2020-08-12 10:58:00 -07:00
test_memcat_p.c
…
test_meminit.c
lib/test_meminit.c: add bulk alloc/free tests
2019-12-04 19:44:13 -08:00
test_min_heap.c
lib: Introduce generic min-heap
2020-03-06 11:56:59 +01:00
test_module.c
…
test_objagg.c
test_objagg: Fix potential memory leak in error handling
2020-06-15 13:32:11 -07:00
test_overflow.c
lib/test_overflow.c: avoid tainting the kernel and fix wrap size
2019-07-16 19:23:22 -07:00
test_parman.c
…
test_printf.c
Merge tag 'driver-core-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2020-06-07 10:53:36 -07:00
test_rhashtable.c
…
test_siphash.c
…
test_sort.c
…
test_stackinit.c
lib: test_stackinit.c: XFAIL switch variable init tests
2020-04-07 10:43:43 -07:00
test_static_key_base.c
…
test_static_keys.c
…
test_string.c
lib/test_string.c: add some testcases for strchr and strnchr
2019-07-16 19:23:22 -07:00
test_strscpy.c
…
test_sysctl.c
Merge tag 'linux-kselftest-5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
2020-06-09 10:03:12 -07:00
test_ubsan.c
…
test_user_copy.c
usercopy: Avoid soft lockups in test_check_nonzero_user()
2019-10-16 14:56:21 +02:00
test_uuid.c
…
test_vmalloc.c
lib/test_vmalloc.c: Add test cases for kvfree_rcu()
2020-06-29 11:59:26 -07:00
test_xarray.c
XArray: Fix xas_pause for large multi-index entries
2020-01-31 15:09:49 -05:00
test-kstrtox.c
…
test-string_helpers.c
lib/test-string_helpers.c: Add string_upper() and string_lower() tests
2020-07-15 12:45:06 +03:00
textsearch.c
lib: textsearch: fix escapes in example code
2019-10-03 12:12:23 -04:00
timerqueue.c
lib/timerqueue: Rely on rbtree semantics for next timer
2019-07-24 17:38:01 +02:00
ts_bm.c
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00
ts_fsm.c
lib/ts_fsm.c: replace zero-length array with flexible-array member
2020-04-07 10:43:43 -07:00
ts_kmp.c
lib/ts_kmp.c: replace zero-length array with flexible-array member
2020-04-07 10:43:43 -07:00
ubsan.c
lib/ubsan.c: fix gcc-10 warnings
2020-06-04 19:06:28 -07:00
ubsan.h
int128: move __uint128_t compiler test to Kconfig
2019-11-17 09:02:42 +08:00
ucmpdi2.c
…
ucs2_string.c
…
usercopy.c
Rebase locking/kcsan to locking/urgent
2020-06-11 20:02:46 +02:00
uuid.c
uuid: Provide a GUID generator for raw buffer
2020-03-23 17:01:47 +01:00
vsprintf.c
lib/vsprintf: Force type of flags value for gfp_t
2020-08-01 12:52:57 +09:00
win_minmax.c
…
xarray.c
xarray: Fix early termination of xas_for_each_marked
2020-03-12 17:42:08 -04:00
xxhash.c
lib/: replace HTTP links with HTTPS ones
2020-08-12 10:58:00 -07:00