Linus Torvalds 7e0fb73c52 Merge branch 'hash' of git://ftp.sciencehorizons.net/linux ... Pull string hash improvements from George Spelvin: "This series does several related things: - Makes the dcache hash (fs/namei.c) useful for general kernel use. (Thanks to Bruce for noticing the zero-length corner case) - Converts the string hashes in <linux/sunrpc/svcauth.h> to use the above. - Avoids 64-bit multiplies in hash_64() on 32-bit platforms. Two 32-bit multiplies will do well enough. - Rids the world of the bad hash multipliers in hash_32. This finishes the job started in commit 689de1d6ca ("Minimal fix-up of bad hashing behavior of hash_64()") The vast majority of Linux architectures have hardware support for 32x32-bit multiply and so derive no benefit from "simplified" multipliers. The few processors that do not (68000, h8/300 and some models of Microblaze) have arch-specific implementations added. Those patches are last in the series. - Overhauls the dcache hash mixing. The patch in commit 0fed3ac866 ("namei: Improve hash mixing if CONFIG_DCACHE_WORD_ACCESS") was an off-the-cuff suggestion. Replaced with a much more careful design that's simultaneously faster and better. (My own invention, as there was noting suitable in the literature I could find. Comments welcome!) - Modify the hash_name() loop to skip the initial HASH_MIX(). This would let us salt the hash if we ever wanted to. - Sort out partial_name_hash(). The hash function is declared as using a long state, even though it's truncated to 32 bits at the end and the extra internal state contributes nothing to the result. And some callers do odd things: - fs/hfs/string.c only allocates 32 bits of state - fs/hfsplus/unicode.c uses it to hash 16-bit unicode symbols not bytes - Modify bytemask_from_count to handle inputs of 1..sizeof(long) rather than 0..sizeof(long)-1. This would simplify users other than full_name_hash" Special thanks to Bruce Fields for testing and finding bugs in v1. (I learned some humbling lessons about "obviously correct" code.) On the arch-specific front, the m68k assembly has been tested in a standalone test harness, I've been in contact with the Microblaze maintainers who mostly don't care, as the hardware multiplier is never omitted in real-world applications, and I haven't heard anything from the H8/300 world" * 'hash' of git://ftp.sciencehorizons.net/linux: h8300: Add <asm/hash.h> microblaze: Add <asm/hash.h> m68k: Add <asm/hash.h> <linux/hash.h>: Add support for architecture-specific functions fs/namei.c: Improve dcache hash function Eliminate bad hash multipliers from hash_32() and hash_64() Change hash_64() return value to 32 bits <linux/sunrpc/svcauth.h>: Define hash_str() in terms of hashlen_string() fs/namei.c: Add hashlen_string() function Pull out string hash to <linux/stringhash.h>		2016-05-28 16:15:25 -07:00
..
842	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2016-03-17 21:38:27 -07:00
fonts	…
lz4	lib: lz4: cleanup unaligned access efficiency detection	2016-04-13 09:22:49 -07:00
lzo	…
mpi	lib/mpi: mpi_read_raw_from_sgl(): fix out-of-bounds buffer access	2016-04-05 20:35:51 +08:00
raid6	powerpc: Create disable_kernel_{fp,altivec,vsx,spe}()	2015-12-01 13:52:25 +11:00
reed_solomon	…
xz	…
zlib_deflate	zlib_deflate/deftree: remove bi_reverse()	2015-09-10 13:29:01 -07:00
zlib_inflate	…
.gitignore	…
Kconfig	raxix-tree: introduce CONFIG_RADIX_TREE_MULTIORDER	2016-05-20 17:58:30 -07:00
Kconfig.debug	Merge branch 'hash' of git://ftp.sciencehorizons.net/linux	2016-05-28 16:15:25 -07:00
Kconfig.kasan	mm, kasan: stackdepot implementation. Enable stackdepot for SLAB	2016-03-25 16:37:42 -07:00
Kconfig.kgdb	kgdb: depends on VT	2016-05-23 17:04:14 -07:00
Kconfig.kmemcheck	…
Kconfig.ubsan	ubsan: fix tree-wide -Wmaybe-uninitialized false positives	2016-03-22 15:36:02 -07:00
Makefile	Merge branch 'hash' of git://ftp.sciencehorizons.net/linux	2016-05-28 16:15:25 -07:00
argv_split.c	…
asn1_decoder.c	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-05-17 09:33:39 -07:00
assoc_array.c	assoc_array: don't call compare_object() on a node	2016-04-06 14:06:48 +01:00
atomic64.c	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
atomic64_test.c	x86/cpufeature: Carve out X86_FEATURE_*	2016-01-30 11:22:17 +01:00
audit.c	syscalls: implement execveat() system call	2014-12-13 12:42:51 -08:00
bcd.c	…
bch.c	…
bitmap.c	lib/bitmap.c: conversion routines to/from u32 array	2016-02-19 22:54:09 -05:00
bitrev.c	ARM: 8187/1: add CONFIG_HAVE_ARCH_BITREVERSE to support rbit instruction	2014-12-22 16:43:06 +00:00
bsearch.c	…
btree.c	treewide: Remove old email address	2015-11-23 09:44:58 +01:00
bug.c	lib/bug.c: use common WARN helper	2016-03-17 15:09:34 -07:00
build_OID_registry	…
bust_spinlocks.c	…
check_signature.c	…
checksum.c	ipv4: Update parameters for csum_tcpudp_magic to their original types	2016-03-13 23:55:13 -04:00
clz_ctz.c	…
clz_tab.c	…
cmdline.c	…
compat_audit.c	…
cordic.c	…
cpu-notifier-error-inject.c	…
cpu_rmap.c	sched/topology: Rename topology_thread_cpumask() to topology_sibling_cpumask()	2015-05-27 15:22:15 +02:00
cpumask.c	cpumask: Export cpumask_any_but()	2016-02-29 09:35:20 +01:00
crc-ccitt.c	…
crc-itu-t.c	lib: crc-itu-t.[ch] fix 0x0x prefix in integer constants	2015-05-26 15:26:43 +02:00
crc-t10dif.c	lib: introduce crc_t10dif_update()	2015-05-30 22:42:24 -07:00
crc7.c	…
crc8.c	…
crc16.c	…
crc32.c	…
crc32defs.h	…
ctype.c	…
debug_info.c	kbuild: include core debug info when DEBUG_INFO_REDUCED	2015-06-11 15:08:32 +02:00
debug_locks.c	…
debugobjects.c	debugobjects: insulate non-fixup logic related to static obj from fixup callbacks	2016-05-19 19:12:14 -07:00
dec_and_lock.c	…
decompress.c	lib/decompress: set the compressor name to NULL on error	2015-07-17 16:39:54 -07:00
decompress_bunzip2.c	lib/decompressors: use real out buf size for gunzip with kernel	2015-09-10 13:29:01 -07:00
decompress_inflate.c	lib/decompressors: use real out buf size for gunzip with kernel	2015-09-10 13:29:01 -07:00
decompress_unlz4.c	lib/decompressors: use real out buf size for gunzip with kernel	2015-09-10 13:29:01 -07:00
decompress_unlzma.c	lib/decompress_unlzma: Do a NULL check for pointer	2015-09-10 13:29:01 -07:00
decompress_unlzo.c	lib/decompressors: use real out buf size for gunzip with kernel	2015-09-10 13:29:01 -07:00
decompress_unxz.c	lib/decompressors: use real out buf size for gunzip with kernel	2015-09-10 13:29:01 -07:00
devres.c	devres: use to_pci_dev()	2016-02-07 23:17:59 -08:00
digsig.c	KEYS: Merge the type-specific data with the payload data	2015-10-21 15:18:36 +01:00
div64.c	__div64_32(): make it overridable at compile time	2015-11-16 14:42:12 -05:00
dma-debug.c	dma-debug: avoid spinlock recursion when disabling dma-debug	2016-05-26 15:35:44 -07:00
dma-noop.c	dma: Provide simple noop dma ops	2016-03-02 17:01:55 +02:00
dump_stack.c	dump_stack: avoid potential deadlocks	2016-02-05 18:10:40 -08:00
dynamic_debug.c	convert a bunch of open-coded instances of memdup_user_nul()	2016-01-04 10:26:58 -05:00
dynamic_queue_limits.c	lib/dynamic_queue_limits.c: simplify includes	2015-02-12 18:54:15 -08:00
earlycpio.c	…
extable.c	extable: add support for relative extables to search and sort routines	2016-02-24 14:57:26 +00:00
fault-inject.c	fault-inject: fix inverted interval/probability values in printk	2015-10-23 17:55:10 +09:00
fdt.c	…
fdt_empty_tree.c	…
fdt_ro.c	…
fdt_rw.c	…
fdt_strerror.c	…
fdt_sw.c	…
fdt_wip.c	…
find_bit.c	lib: rename lib/find_next_bit.c to lib/find_bit.c	2015-04-17 09:03:54 -04:00
flex_array.c	…
flex_proportions.c	lib+mm: fix few spelling mistakes	2016-02-15 11:18:23 +01:00
gcd.c	lib/GCD.c: use binary GCD algorithm instead of Euclidean	2016-05-20 17:58:30 -07:00
gen_crc32table.c	lib: crc32: constify crc32 lookup table	2015-02-13 21:21:35 -08:00
genalloc.c	CPM/QE: use genalloc to manage CPM/QE muram	2015-12-22 17:10:18 -06:00
glob.c	…
halfmd4.c	lib/halfmd4.c: use rol32 inline function in the ROUND macro	2015-11-06 17:50:42 -08:00
hexdump.c	lib/hexdump.c: truncate output in case of overflow	2015-11-06 17:50:42 -08:00
hweight.c	…
idr.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
inflate.c	…
int_sqrt.c	…
interval_tree.c	lib/interval_tree.c: simplify includes	2015-02-12 18:54:15 -08:00
interval_tree_test.c	…
iomap.c	…
iomap_copy.c	lib/iomap_copy.c: add __ioread32_copy()	2016-01-20 17:09:18 -08:00
iommu-common.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc	2015-11-05 16:34:48 -08:00
iommu-helper.c	…
ioremap.c	x86, mm: support huge KVA mappings on x86	2015-04-14 16:49:04 -07:00
iov_iter.c	Merge branch 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-05-25 15:59:09 -07:00
irq_poll.c	irq_poll: Fix irq_poll_sched()	2016-01-19 15:26:55 -05:00
irq_regs.c	…
is_single_threaded.c	lib/is_single_threaded.c: change current_is_single_threaded() to use for_each_thread()	2015-11-06 17:50:42 -08:00
jedec_ddr_data.c	…
kasprintf.c	lib/kasprintf.c: add sanity check to kvasprintf	2016-01-16 11:17:27 -08:00
kfifo.c	…
klist.c	klist: fix starting point removed bug in klist iterators	2016-02-07 22:18:47 -08:00
kobject.c	kobject: export kset_find_obj() for module use	2016-02-09 17:36:34 -08:00
kobject_uevent.c	lib/kobject_uevent.c: remove redundant include	2015-02-12 18:54:15 -08:00
kstrtox.c	lib: add "on"/"off" support to kstrtobool	2016-03-17 15:09:34 -07:00
kstrtox.h	…
lcm.c	block: fix blk_stack_limits() regression due to lcm() change	2015-03-31 09:45:50 -06:00
libcrc32c.c	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2016-01-22 11:58:43 -08:00
list_debug.c	list: kill list_force_poison()	2016-03-09 15:43:42 -08:00
list_sort.c	lib/list_sort: use late_initcall to hook in self tests	2015-06-16 14:12:35 -04:00
llist.c	lib/llist.c: fix data race in llist_del_first	2015-11-06 17:50:42 -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	…
lockref.c	locking/lockref: Remove homebrew cmpxchg64_relaxed() macro definition	2015-08-12 11:59:04 +02:00
lru_cache.c	lru_cache: Converted lc_seq_printf_status to return void	2015-11-25 09:22:02 -07:00
md5.c	lib/md5.c: simplify include	2015-02-12 18:54:15 -08:00
memory-notifier-error-inject.c	…
memweight.c	…
net_utils.c	…
netdev-notifier-error-inject.c	net: Add support for CHANGEUPPER notifier error injection	2015-12-03 11:49:23 -05:00
nlattr.c	libnl: fix help of _64bit functions	2016-04-23 20:13:24 -04:00
nmi_backtrace.c	printk/nmi: generic solution for safe printk in NMI	2016-05-20 17:58:30 -07:00
nodemask.c	include/linux/nodemask.h: create next_node_in() helper	2016-05-19 19:12:14 -07:00
notifier-error-inject.c	…
notifier-error-inject.h	…
of-reconfig-notifier-error-inject.c	…
oid_registry.c	…
once.c	once: make helper generic for calling functions once	2015-10-08 05:26:36 -07:00
parser.c	…
pci_iomap.c	libnvdimm for 4.3:	2015-09-08 14:35:59 -07:00
percpu-refcount.c	lib+mm: fix few spelling mistakes	2016-02-15 11:18:23 +01:00
percpu_counter.c	percpu_counter: update debugobjects fixup callbacks return type	2016-05-19 19:12:14 -07:00
percpu_ida.c	mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM	2015-11-06 17:50:42 -08:00
percpu_test.c	…
plist.c	lib/plist.c: remove redundant include	2015-02-12 18:54:16 -08:00
pm-notifier-error-inject.c	…
radix-tree.c	radix-tree: make radix_tree_descend() more useful	2016-05-20 17:58:30 -07:00
random32.c	netfilter: meta: add PRANDOM support	2016-02-29 13:55:59 +01:00
ratelimit.c	ratelimit: fix bug in time interval by resetting right begin time	2016-01-21 17:20:51 -08:00
rational.c	…
rbtree.c	rbtree: Make lockless searches non-fatal	2015-05-28 11:32:04 +09:30
rbtree_test.c	…
reciprocal_div.c	…
rhashtable.c	rhashtable: accept GFP flags in rhashtable_walk_init	2016-04-05 10:56:32 +02:00
scatterlist.c	scatterlist: fix a typo in comment block of sg_miter_stop()	2016-02-08 10:15:17 -08:00
seq_buf.c	tracing: Use seq_buf_used() in seq_buf_to_user() instead of len	2015-12-23 14:27:20 -05:00
sg_pool.c	lib: scatterlist: move SG pool code from SCSI driver to lib/sg_pool.c	2016-04-15 16:53:14 -04:00
sg_split.c	lib: scatterlist: add sg splitting function	2015-08-24 14:28:01 -06:00
sha1.c	lib: EXPORT_SYMBOL sha_init	2015-03-23 22:12:08 -04:00
show_mem.c	lib/show_mem.c: correct reserved memory calculation	2015-09-08 15:35:28 -07:00
smp_processor_id.c	…
sort.c	lib/sort: Add 64 bit swap function	2015-06-25 17:00:40 -07:00
stackdepot.c	lib/stackdepot: avoid to return 0 handle	2016-05-05 17:38:53 -07:00
stmp_device.c	lib/stmp_device.c: replace module.h include	2015-02-12 18:54:16 -08:00
string.c	lib: move strtobool() to kstrtobool()	2016-03-17 15:09:34 -07:00
string_helpers.c	string_helpers: add kstrdup_quotable_file	2016-04-21 10:47:26 +10:00
strncpy_from_user.c	x86/kasan: instrument user memory access API	2016-05-20 17:58:30 -07:00
strnlen_user.c	Use the new batched user accesses in generic user string handling	2015-12-17 10:05:19 -08:00
swiotlb.c	Merge branch 'for-4.2/sg' of git://git.kernel.dk/linux-block	2015-06-25 15:22:36 -07:00
syscall.c	…
test-kstrtox.c	kstrto*: accept "-0" for signed conversion	2015-09-10 13:29:01 -07:00
test-string_helpers.c	lib/test-string_helpers.c: fix and improve string_get_size() tests	2016-02-03 08:28:43 -08:00
test_bitmap.c	test_bitmap: unit tests for lib/bitmap.c	2016-02-19 22:54:09 -05:00
test_bpf.c	bpf: prepare bpf_int_jit_compile/bpf_prog_select_runtime apis	2016-05-16 13:49:32 -04:00
test_firmware.c	test: firmware_class: add asynchronous request trigger	2016-01-07 13:44:22 -07:00
test_hash.c	<linux/hash.h>: Add support for architecture-specific functions	2016-05-28 15:48:31 -04:00
test_hexdump.c	test_hexdump: print statistics at the end	2016-01-20 17:09:18 -08:00
test_kasan.c	kasan/tests: add tests for user memory access functions	2016-05-20 17:58:30 -07:00
test_module.c	…
test_printf.c	mm, printk: introduce new format string for flags	2016-03-15 16:55:16 -07:00
test_rhashtable.c	rhashtable: accept GFP flags in rhashtable_walk_init	2016-04-05 10:56:32 +02:00
test_static_key_base.c	locking/static_keys: Provide a selftest	2015-08-03 11:51:12 +02:00
test_static_keys.c	locking/static_keys: Avoid nested functions	2016-02-09 10:27:29 +01:00
test_user_copy.c	…
textsearch.c	…
timerqueue.c	timerqueue: Let timerqueue_add/del return information	2015-04-22 17:06:49 +02:00
ts_bm.c	…
ts_fsm.c	…
ts_kmp.c	…
ubsan.c	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
ubsan.h	UBSAN: run-time undefined behavior sanity checker	2016-01-20 17:09:18 -08:00
ucs2_string.c	lib/ucs2_string: Correct ucs2 -> utf8 conversion	2016-02-16 12:49:05 +00:00
usercopy.c	…
uuid.c	lib/uuid.c: remove FSF address	2016-05-20 17:58:30 -07:00
vsprintf.c	lib/uuid.c: introduce a few more generic helpers	2016-05-20 17:58:30 -07:00