Roman Zippel 2418f4f28f introduce explicit signed/unsigned 64bit divide ... The current do_div doesn't explicitly say that it's unsigned and the signed counterpart is missing, which is e.g. needed when dealing with time values. This introduces 64bit signed/unsigned divide functions which also attempts to cleanup the somewhat awkward calling API, which often requires the use of temporary variables for the dividend. To avoid the need for temporary variables everywhere for the remainder, each divide variant also provides a version which doesn't return the remainder. Each architecture can now provide optimized versions of these function, otherwise generic fallback implementations will be used. As an example I provided an alternative for the current x86 divide, which avoids the asm casts and using an union allows gcc to generate better code. It also avoids the upper divde in a few more cases, where the result is known (i.e. upper quotient is zero). Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Cc: john stultz <johnstul@us.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2008-05-01 08:03:58 -07:00
..
lzo	lzo: fix typo in decompressor	2008-04-10 15:34:05 -07:00
reed_solomon	lib: Remove unnecessary inclusions of asm/semaphore.h	2008-04-18 22:17:17 -04:00
zlib_deflate	lib/: Spelling fixes	2008-02-03 17:48:52 +02:00
zlib_inflate	[ZLIB]: Fix external builds of zlib_inflate code.	2007-10-11 22:17:20 -07:00
.gitignore
argv_split.c	LIB: Replace inappropriate include of <linux/bug.h>	2007-10-20 00:26:10 +02:00
audit.c
bitmap.c	mempolicy: add bitmap_onto() and bitmap_fold() operations	2008-04-28 08:58:19 -07:00
bitrev.c
bug.c
bust_spinlocks.c	handle recursive calls to bust_spinlocks()	2007-10-17 08:42:56 -07:00
check_signature.c
cmdline.c
cpumask.c
crc7.c
crc16.c
crc32.c	lib/: Spelling fixes	2008-02-03 17:48:52 +02:00
crc32defs.h
crc-ccitt.c
crc-itu-t.c
ctype.c
debug_locks.c
debugobjects.c	infrastructure to debug (dynamic) objects	2008-04-30 08:29:53 -07:00
dec_and_lock.c
devres.c	devres: support addresses greater than an unsigned long via dev_ioremap	2008-04-30 16:52:48 -07:00
div64.c	introduce explicit signed/unsigned 64bit divide	2008-05-01 08:03:58 -07:00
dump_stack.c
extable.c	lib/extable.c: remove an expensive integer divide in search_extable()	2008-02-06 10:41:08 -08:00
fault-inject.c	libfs: allow error return from simple attributes	2008-02-08 09:22:34 -08:00
find_next_bit.c	bitops: remove "optimizations"	2008-04-29 08:11:16 -07:00
gen_crc32table.c
genalloc.c
halfmd4.c
hexdump.c	hexdump: don't print bytes with bit 7 set	2007-11-29 09:24:53 -08:00
hweight.c	remove asm/bitops.h includes	2007-10-19 11:53:41 -07:00
idr.c	idr: create idr_layer_cache at boot time	2008-04-29 08:06:25 -07:00
inflate.c	lib/inflate.c: handle failed malloc()	2008-04-29 08:06:02 -07:00
int_sqrt.c
iomap_copy.c
iomap.c	iomap: fix 64 bits resources on 32 bits	2008-04-29 08:06:02 -07:00
iommu-helper.c	iommu: export iommu_is_span_boundary helper function	2008-03-04 16:35:17 -08:00
ioremap.c	lib/ioremap.c should #include <linux/io.h>	2007-10-17 08:42:50 -07:00
irq_regs.c
kasprintf.c	lib: move kasprintf to a separate file	2007-07-31 15:39:39 -07:00
Kconfig	x86, bitops: select the generic bitmap search functions	2008-04-26 19:21:17 +02:00
Kconfig.debug	debugobjects: add timer specific object debugging code	2008-04-30 08:29:53 -07:00
Kconfig.kgdb	kgdb: allow static kgdbts boot configuration	2008-04-17 20:05:43 +02:00
kernel_lock.c	Convert asm/semaphore.h users to linux/semaphore.h	2008-04-18 22:22:54 -04:00
klist.c	klist: fix coding style errors in klist.h and klist.c	2008-04-30 16:52:58 -07:00
kobject_uevent.c	lib: replace remaining __FUNCTION__ occurrences	2008-04-30 08:29:54 -07:00
kobject.c	kobject: do not copy vargs, just pass them around	2008-04-30 16:52:48 -07:00
kref.c	kref: add kref_set()	2008-01-24 20:40:05 -08:00
libcrc32c.c	[LIB] crc32c: Keep intermediate crc state in cpu order	2007-11-08 21:34:09 +08:00
list_debug.c
lmb.c	[POWERPC] Provide walk_memory_resource() for powerpc	2008-04-29 15:57:53 +10:00
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
Makefile	infrastructure to debug (dynamic) objects	2008-04-30 08:29:53 -07:00
parser.c
percpu_counter.c	mm: bdi: export BDI attributes in sysfs	2008-04-30 08:29:49 -07:00
plist.c
prio_heap.c	Fix cpusets update_cpumask	2007-10-19 11:53:41 -07:00
prio_tree.c
proportions.c	mm: bdi: allow setting a maximum for the bdi dirty limit	2008-04-30 08:29:50 -07:00
radix-tree.c	Remove set_migrateflags()	2008-04-28 08:58:17 -07:00
random32.c	[NET]: srandom32 fixes for networking v2	2008-04-03 14:07:02 -07:00
ratelimit.c	isolate ratelimit from printk.c for other use	2008-04-29 08:06:06 -07:00
rbtree.c
reciprocal_div.c
rwsem-spinlock.c	lib: remove fastcall from lib/*	2008-02-08 09:22:31 -08:00
rwsem.c	x86: fix UML and -regparm=3	2008-01-30 13:33:00 +01:00
scatterlist.c	[SCSI] block: add sg buffer copy helper functions	2008-04-07 12:15:45 -05:00
sha1.c
smp_processor_id.c	debug_smp_processor_id() fixlets	2008-02-06 10:41:09 -08:00
sort.c	lib/sort.c optimization	2007-10-17 08:42:52 -07:00
spinlock_debug.c	Use helpers to obtain task pid in printks	2007-10-19 11:53:43 -07:00
string.c
swiotlb.c	dma/ia64: update ia64 machvecs, swiotlb.c	2008-04-29 08:06:12 -07:00
textsearch.c	[TEXTSEARCH]: Do not allow zero length patterns in the textsearch infrastructure	2007-12-01 00:03:52 +11:00
ts_bm.c
ts_fsm.c
ts_kmp.c
vsprintf.c	lib/vsprintf.c: fix bug omitting minus sign of numbers (module_param)	2008-02-23 17:12:14 -08:00