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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 13:13:57 +08:00
linux-next/arch
Jeremy Fitzhardinge f595ec964d common implementation of iterative div/mod
We have a few instances of the open-coded iterative div/mod loop, used
when we don't expcet the dividend to be much bigger than the divisor.
Unfortunately modern gcc's have the tendency to strength "reduce" this
into a full mod operation, which isn't necessarily any faster, and
even if it were, doesn't exist if gcc implements it in libgcc.

The workaround is to put a dummy asm statement in the loop to prevent
gcc from performing the transformation.

This patch creates a single implementation of this loop, and uses it
to replace the open-coded versions I know about.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Christian Kujau <lists@nerdbynature.de>
Cc: Robert Hancock <hancockr@shaw.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-06-12 10:47:56 +02:00
..
alpha [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
arm [ARM] pxa: fix tosa.c build error 2008-06-02 20:38:15 +01:00
avr32 avr32: Fix cpufreq oops when ondemand governor is default 2008-05-27 09:37:42 +02:00
blackfin Blackfin arch: protect only the SPI bus controller with CONFIG_SPI_BFIN 2008-06-07 15:03:01 +08:00
cris [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
frv Fix various old email addresses for dwmw2 2008-06-06 11:29:10 -07:00
h8300 [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
ia64 [IA64] Workaround for RSE issue 2008-05-27 13:24:39 -07:00
m32r [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
m68k m68k: enable CONFIG_COMPAT_BRK by default 2008-06-06 11:29:09 -07:00
m68knommu [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
mips Fix divide by zero error in build_clear_page() and build_copy_page() 2008-06-05 18:13:16 +01:00
mn10300 [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
parisc [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
powerpc [POWERPC] Make walk_memory_resource available with MEMORY_HOTPLUG=n 2008-06-09 11:32:41 +10:00
ppc [POWERPC] Export empty_zero_page and copy_page in arch/ppc 2008-05-31 17:08:28 +10:00
s390 [S390] Update default configuration. 2008-05-30 10:03:36 +02:00
sh sh: Add -mno-fdpic to default flags. 2008-06-09 16:49:43 +09:00
sparc sparc: switch /proc/led to seq_file 2008-06-03 15:21:21 -07:00
sparc64 sparc64: Prevent stack backtrace false positives on trap frames. 2008-05-21 21:50:01 -07:00
um uml: PATH_MAX needs limits.h 2008-06-06 11:29:10 -07:00
v850 [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
x86 common implementation of iterative div/mod 2008-06-12 10:47:56 +02:00
xtensa [PATCH] take init_files to fs/file.c 2008-05-16 17:22:20 -04:00
.gitignore
Kconfig dma: add dma_*map*_attrs() interfaces 2008-04-29 08:06:11 -07:00