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8d7dc9283f399e1fda4e48a1c453f689326d9396
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Paul E. McKenney 8d7dc9283f rcu: Control grace-period delays directly from value 
In a misguided attempt to avoid an #ifdef, the use of the
gp_init_delay module parameter was conditioned on the corresponding
RCU_TORTURE_TEST_SLOW_INIT Kconfig variable, using IS_ENABLED() at
the point of use in the code.  This meant that the compiler always saw
the delay, which meant that RCU_TORTURE_TEST_SLOW_INIT_DELAY had to be
unconditionally defined.  This in turn caused "make oldconfig" to ask
pointless questions about the value of RCU_TORTURE_TEST_SLOW_INIT_DELAY
in cases where it was not even used.

This commit avoids these pointless questions by defining gp_init_delay
under #ifdef.  In one branch, gp_init_delay is initialized to
RCU_TORTURE_TEST_SLOW_INIT_DELAY and is also a module parameter (thus
allowing boot-time modification), and in the other branch gp_init_delay
is a const variable initialized by default to zero.

This approach also simplifies the code at the delay point by eliminating
the IS_DEFINED().  Because gp_init_delay is constant zero in the no-delay
case intended for production use, the "gp_init_delay > 0" check causes
the delay to become dead code, as desired in this case.  In addition,
this commit replaces magic constant "10" with the preprocessor variable
PER_RCU_NODE_PERIOD, which controls the number of grace periods that
are allowed to elapse at full speed before a delay is inserted.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
Paul E. McKenney <paulmck@linux.vnet.ibm.com>
2015-04-14 19:33:59 -07:00
..
fonts
fonts: Add 6x10 font
2014-10-09 11:35:48 +03:00
lz4
LZ4 : fix the data abort issue
2015-03-16 21:55:35 +01:00
lzo
lzo: check for length overrun in variable length encoding.
2014-09-28 11:08:01 +02:00
mpi
MPILIB: Fix comparison of negative MPIs
2015-01-14 16:10:12 +00:00
raid6
x86/raid6: correctly check for assembler capabilities
2015-02-04 08:35:51 +11:00
reed_solomon
…
xz
lib/xz: enable all filters by default in Kconfig
2014-06-04 16:54:18 -07:00
zlib_deflate
zlib: clean up some dead code
2014-08-06 18:01:24 -07:00
zlib_inflate
zlib: clean up some dead code
2014-08-06 18:01:24 -07:00
.gitignore
X.509: Implement simple static OID registry
2012-10-08 13:50:18 +10:30
argv_split.c
argv_split(): teach it to handle mutable strings
2013-04-29 18:28:19 -07:00
asn1_decoder.c
lib/asn1_decoder.c: kernel-doc warning fix
2014-06-04 16:54:19 -07:00
assoc_array.c
assoc_array: Include rcupdate.h for call_rcu() definition
2015-01-07 16:08:41 +00:00
atomic64_test.c
lib/atomic64_test.c: convert printk(KERN_INFO to pr_info
2014-06-04 16:54:19 -07:00
atomic64.c
locking,arch: Rewrite generic atomic support
2014-08-14 12:48:14 +02:00
audit.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
average.c
lib: Ensure EWMA does not store wrong intermediate values
2014-01-16 23:46:06 -08:00
bcd.c
usb/core: use bin2bcd() for bcdDevice in RH
2012-09-10 11:13:16 -07:00
bch.c
…
bitmap.c
bitmap, cpumask, nodemask: remove dedicated formatting functions
2015-02-13 21:21:39 -08:00
bitrev.c
ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction
2014-12-22 16:43:06 +00:00
bsearch.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
btree.c
lib/btree.c: fix leak of whole btree nodes
2014-06-04 16:54:18 -07:00
bug.c
lib/bug: Use RCU list ops for module_bug_list
2014-11-11 17:07:46 +10:30
build_OID_registry
X.509: do not emit any informational output
2013-06-19 17:54:06 +02:00
bust_spinlocks.c
printk: Provide a wake_up_klogd() off-case
2013-03-22 16:41:20 -07:00
check_signature.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
checksum.c
lib/checksum.c: fix build for generic csum_tcpudp_nofold
2015-01-29 11:57:38 -08:00
clz_ctz.c
lib/clz_ctz.c: add prototype declarations in lib/clz_ctz.c
2014-04-03 16:21:12 -07:00
clz_tab.c
lib: Fix multiple definitions of clz_tab
2012-02-02 10:34:23 +11:00
cmdline.c
lib: Add a generic cmdline parse function parse_option_str
2014-10-03 18:40:58 +01:00
compat_audit.c
audit: Add generic compat syscall support
2014-03-20 10:11:35 -04:00
cordic.c
Docs: wording: functions -> algorithm
2011-10-29 21:20:22 +02:00
cpu_rmap.c
Remove GENERIC_HARDIRQ config option
2013-09-13 15:09:52 +02:00
cpu-notifier-error-inject.c
cpu: rewrite cpu-notifier-error-inject module
2012-07-30 17:25:22 -07:00
cpumask.c
lib/cpumask: cpumask_set_cpu_local_first to use all cores when numa node is not defined
2014-07-02 18:29:23 -07:00
crc7.c
lib/crc7: Shift crc7() output left 1 bit
2014-05-16 14:26:52 -04:00
crc8.c
…
crc16.c
…
crc32.c
lib: crc32: Add some additional __pure annotations
2014-06-25 16:04:00 -07:00
crc32defs.h
crc32: select an algorithm via Kconfig
2012-03-23 16:58:38 -07:00
crc-ccitt.c
…
crc-itu-t.c
…
crc-t10dif.c
crypto: crct10dif - Add fallback for broken initrds
2013-09-12 15:31:34 +10:00
ctype.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
debug_locks.c
mutex: Add support for wound/wait style locks
2013-06-26 12:10:56 +02:00
debugobjects.c
lib/debugobjects.c: convert printk(KERN_DEBUG to pr_debug
2014-06-04 16:53:53 -07:00
dec_and_lock.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
decompress_bunzip2.c
decompress_bunzip2: off by one in get_next_block()
2014-12-13 12:42:52 -08:00
decompress_inflate.c
initramfs: support initramfs that is bigger than 2GiB
2014-08-08 15:57:26 -07:00
decompress_unlz4.c
initramfs: support initramfs that is bigger than 2GiB
2014-08-08 15:57:26 -07:00
decompress_unlzma.c
initramfs: support initramfs that is bigger than 2GiB
2014-08-08 15:57:26 -07:00
decompress_unlzo.c
initramfs: support initramfs that is bigger than 2GiB
2014-08-08 15:57:26 -07:00
decompress_unxz.c
initramfs: support initramfs that is bigger than 2GiB
2014-08-08 15:57:26 -07:00
decompress.c
lib/decompress.c: consistency of compress formats for kernel image
2014-12-13 12:42:52 -08:00
devres.c
devres: support sizes greater than an unsigned long
2014-11-07 10:09:07 -08:00
digsig.c
lib/digsig.c: kernel-doc warning fixes
2014-06-04 16:54:19 -07:00
div64.c
math64: New separate div64_u64_rem helper
2013-08-23 09:02:14 -04:00
dma-debug.c
dma-debug: prevent early callers from crashing
2014-12-10 17:41:02 -08:00
dump_stack.c
asmlinkage: Add explicit __visible to drivers/*, lib/*, kernel/*
2014-05-05 16:07:46 -07:00
dynamic_debug.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2015-02-10 18:57:15 -08:00
dynamic_queue_limits.c
lib/dynamic_queue_limits.c: simplify includes
2015-02-12 18:54:15 -08:00
earlycpio.c
earlycpio.c: Fix the confusing comment of find_cpio_data().
2013-08-14 23:24:01 +02:00
extable.c
…
fault-inject.c
fault-inject: add ratelimit option
2014-12-13 12:42:52 -08:00
fdt_empty_tree.c
lib: add fdt_empty_tree.c
2014-04-30 19:49:37 +01:00
fdt_ro.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_rw.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_strerror.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_sw.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt_wip.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
fdt.c
of/lib: Allow scripts/dtc/libfdt to be used from kernel code
2012-07-23 13:54:52 +01:00
find_last_bit.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
find_next_bit.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
flex_array.c
reciprocal_divide: update/correction of the algorithm
2014-01-21 23:17:20 -08:00
flex_proportions.c
proportions: add @gfp to init functions
2014-09-08 09:51:30 +09:00
gcd.c
lib/gcd.c: prevent possible div by 0
2012-10-06 03:04:57 +09:00
gen_crc32table.c
lib: crc32: constify crc32 lookup table
2015-02-13 21:21:35 -08:00
genalloc.c
lib/genalloc.c: check result of devres_alloc()
2015-02-13 21:21:36 -08:00
glob.c
lib/glob.c: add CONFIG_GLOB_SELFTEST
2014-08-06 18:01:25 -07:00
halfmd4.c
lib/halfmd4.c: simplify includes
2015-02-12 18:54:15 -08:00
hexdump.c
hexdump: make it return number of bytes placed in buffer
2015-02-12 18:54:15 -08:00
hweight.c
Make ARCH_HAS_FAST_MULTIPLIER a real config variable
2014-09-13 11:14:53 -07:00
idr.c
lib/idr.c: remove redundant include
2015-02-12 18:54:15 -08:00
inflate.c
…
int_sqrt.c
lib/int_sqrt.c: optimize square root algorithm
2013-04-29 18:28:19 -07:00
interval_tree_test.c
lib: Export interval_tree
2014-05-05 09:09:14 +02:00
interval_tree.c
lib/interval_tree.c: simplify includes
2015-02-12 18:54:15 -08:00
iomap_copy.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
iomap.c
Kconfig: rename HAS_IOPORT to HAS_IOPORT_MAP
2014-04-07 16:36:11 -07:00
iommu-helper.c
Merge tag 'module-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2012-03-24 10:24:31 -07:00
ioremap.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
iov_iter.c
move iov_iter.c from mm/ to lib/
2015-02-17 22:22:17 -05:00
irq_regs.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
is_single_threaded.c
…
jedec_ddr_data.c
ddr: add LPDDR2 data from JESD209-2
2012-05-02 00:04:06 -07:00
kasprintf.c
lib/kasprintf.c: use kmalloc_track_caller() to get accurate traces for kvasprintf
2012-10-11 08:50:15 +09:00
Kconfig
Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
2015-02-19 10:36:45 -08:00
Kconfig.debug
rcu: Control grace-period delays directly from value
2015-04-14 19:33:59 -07:00
Kconfig.kasan
kasan: enable instrumentation of global variables
2015-02-13 21:21:42 -08:00
Kconfig.kgdb
kdb: Allow access to sensitive commands to be restricted by default
2014-11-11 09:31:52 -06:00
Kconfig.kmemcheck
…
kfifo.c
kfifo: use BUG_ON
2014-08-08 15:57:25 -07:00
klist.c
klist: use same naming scheme as hlist for klist_add_after()
2014-08-06 18:01:24 -07:00
kobject_uevent.c
lib/kobject_uevent.c: remove redundant include
2015-02-12 18:54:15 -08:00
kobject.c
kobject: fix NULL pointer derefernce in kobj_child_ns_ops
2014-11-07 10:52:19 -08:00
kstrtox.c
lib/kstrtox.c: remove redundant cleanup
2014-01-23 16:36:57 -08:00
kstrtox.h
lib/kstrtox: common code between kstrto*() and simple_strto*() functions
2011-10-31 17:30:56 -07:00
lcm.c
lib/lcm.c: replace include
2015-02-12 18:54:16 -08:00
libcrc32c.c
crypto: LLVMLinux: Remove VLAIS usage from libcrc32c.c
2014-10-14 10:51:23 +02:00
list_debug.c
rcu: Fix broken strings in RCU's source code.
2012-07-06 06:01:49 -07:00
list_sort.c
lib/list_sort.c: rearrange includes
2015-02-12 18:54:15 -08:00
llist.c
lib/llist.c: remove redundant include
2015-02-12 18:54:15 -08:00
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-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
locking/lockdep: Revert qrwlock recusive stuff
2014-10-03 06:09:30 +02:00
lockref.c
dcache: let the dentry count go down to zero without taking d_lock
2015-01-25 23:16:29 -05:00
lru_cache.c
drbd: debugfs: add per volume oldest_requests
2014-07-10 18:35:19 +02:00
Makefile
move iov_iter.c from mm/ to lib/
2015-02-17 22:22:17 -05:00
md5.c
lib/md5.c: simplify include
2015-02-12 18:54:15 -08:00
memory-notifier-error-inject.c
memory: memory notifier error injection module
2012-07-30 17:25:22 -07:00
memweight.c
string: introduce memweight()
2012-07-30 17:25:16 -07:00
net_utils.c
mac_pton: Use bool not int return
2014-06-25 17:45:43 -07:00
nlattr.c
lib/nlattr.c: remove redundant include
2015-02-12 18:54:16 -08:00
notifier-error-inject.c
mode_t, whack-a-mole at 11...
2013-04-09 14:13:05 -04:00
notifier-error-inject.h
fault-injection: notifier error injection
2012-07-30 17:25:22 -07:00
of-reconfig-notifier-error-inject.c
powerpc+of: Rename and fix OF reconfig notifier error inject module
2012-12-14 10:32:52 +11:00
oid_registry.c
Give the OID registry file module info to avoid kernel tainting
2013-05-05 14:38:00 -07:00
parser.c
lib/parser.c: put EXPORT_SYMBOLs in the conventional place
2014-01-23 16:36:55 -08:00
pci_iomap.c
pci: add pci_iomap_range
2015-01-21 16:28:49 +10:30
percpu_counter.c
percpu_counter: add @gfp to percpu_counter_init()
2014-09-08 09:51:29 +09:00
percpu_ida.c
lib/percpu_ida.c: remove redundant includes
2015-02-12 18:54:16 -08:00
percpu_test.c
percpu: add test module for various percpu operations
2013-11-13 12:09:11 +09:00
percpu-refcount.c
percpu_ref: make INIT_ATOMIC and switch_to_atomic() sticky
2014-09-24 13:31:50 -04:00
plist.c
lib/plist.c: remove redundant include
2015-02-12 18:54:16 -08:00
pm-notifier-error-inject.c
PM: PM notifier error injection module
2012-07-30 17:25:22 -07:00
proportions.c
proportions: add @gfp to init functions
2014-09-08 09:51:30 +09:00
radix-tree.c
lib/radix-tree.c: change to simpler include
2015-02-12 18:54:16 -08:00
random32.c
random32: improvements to prandom_bytes
2014-08-24 18:36:01 -07:00
ratelimit.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
rational.c
lib: Change mail address of Oskar Schirmer
2012-05-17 15:18:37 +02:00
rbtree_test.c
rbtree/test: test rbtree_postorder_for_each_entry_safe()
2014-01-23 16:37:03 -08:00
rbtree.c
lib/rbtree.c: fix typo in comment of __rb_insert()
2014-08-08 15:57:24 -07:00
reciprocal_div.c
reciprocal_divide: update/correction of the algorithm
2014-01-21 23:17:20 -08:00
rhashtable.c
rhashtable: use cond_resched()
2015-02-27 17:55:14 -05:00
scatterlist.c
lib/scatterlist: fix memory leak with scsi-mq
2014-10-28 10:27:10 -06:00
seq_buf.c
seq_buf: Fix seq_buf_bprintf() truncation
2015-03-04 23:40:19 -05:00
sha1.c
lib: reduce the use of module.h wherever possible
2012-03-07 15:04:04 -05:00
show_mem.c
lib/show_mem.c: remove redundant include
2015-02-12 18:54:16 -08:00
smp_processor_id.c
percpu: add preemption checks to __this_cpu ops
2014-04-07 16:36:14 -07:00
sort.c
lib/sort.c: move include inside #if 0
2015-02-12 18:54:16 -08:00
stmp_device.c
lib/stmp_device.c: replace module.h include
2015-02-12 18:54:16 -08:00
string_helpers.c
libstring_helpers.c:string_get_size(): return void
2015-02-12 18:54:13 -08:00
string.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2015-02-14 09:47:01 -08:00
strncpy_from_user.c
lib/strncpy_from_user.c: replace module.h include
2015-02-12 18:54:16 -08:00
strnlen_user.c
lib: Fix generic strnlen_user for 32-bit big-endian machines
2012-05-27 20:59:46 -07:00
swiotlb.c
swiotlb: don't assume PA 0 is invalid
2014-06-20 16:04:32 -04:00
syscall.c
lib/syscall.c: unexport task_current_syscall()
2014-04-03 16:21:06 -07:00
test_bpf.c
test: bpf: expand DIV_KX to DIV_MOD_KX
2014-12-08 20:23:22 -05:00
test_firmware.c
test: add firmware_class loader test
2014-07-17 18:44:19 -07:00
test_kasan.c
lib: add kasan test module
2015-02-13 21:21:41 -08:00
test_module.c
test: add minimal module for verification testing
2014-01-23 16:36:57 -08:00
test_rhashtable.c
rhashtable: remove indirection for grow/shrink decision functions
2015-02-27 16:06:02 -05:00
test_user_copy.c
test: check copy_to/from_user boundary validation
2014-01-23 16:36:57 -08:00
test-hexdump.c
hexdump: make it return number of bytes placed in buffer
2015-02-12 18:54:15 -08:00
test-kstrtox.c
lib/test-kstrtox.c: use ARRAY_SIZE instead of sizeof/sizeof[0]
2014-08-06 18:01:25 -07:00
test-string_helpers.c
lib / string_helpers: introduce string_escape_mem()
2014-10-14 02:18:26 +02:00
textsearch.c
lib/textsearch.c: remove textsearch_put reference from comments
2014-10-14 02:18:14 +02:00
timerqueue.c
Merge tag 'module-for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
2012-03-24 10:24:31 -07:00
ts_bm.c
…
ts_fsm.c
…
ts_kmp.c
…
ucs2_string.c
Move utf16 functions to kernel core and rename
2013-04-15 21:23:03 +01:00
usercopy.c
Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
2013-04-30 17:04:09 -07:00
uuid.c
uuid: use prandom_bytes()
2013-04-29 18:28:42 -07:00
vsprintf.c
lib/vsprintf: implement bitmap printing through '%*pb[l]'
2015-02-13 21:21:36 -08:00