linux/arch
Yinghai Lu 917a015362 x86: mtrr: Fix high_width computation when phys-addr is >= 44bit
found one system where cpu address line is 44bits, mtrr printout
is not right:

 [    0.000000] MTRR variable ranges enabled:
 [    0.000000]   0 base 0   00000000 mask FF0 00000000 write-back
 [    0.000000]   1 base 10  00000000 mask FFF 80000000 write-back
 [    0.000000]   2 base 0   80000000 mask FFF 80000000 uncachable
 [    0.000000]   3 base 0   7F800000 mask FFF FF800000 uncachable

Li Zefan and Frederic pointed out the high_width could be -4 some how.

It turns out when phys_addr is 44bit, size_or_mask will be
ffffffff,00000000 so ffs(size_or_mask) will be 0.

Try to check low 32 bit, to get correct high_width.

Signed-off-by: Yinghai Lu <yinghai@kerne.org>
Also-analyzed-by: Frederic Weisbecker <fweisbec@gmail.com>
Also-analyzed-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zhaolei <zhaolei@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
LKML-Reference: <4A026540.8060504@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11 11:40:43 +02:00
..
alpha alpha: binfmt_aout fix 2009-05-02 15:36:10 -07:00
arm [ARM] 5507/1: support R_ARM_MOVW_ABS_NC and MOVT_ABS relocation types 2009-05-07 17:21:01 +01:00
avr32 avr32: drop unused CLEAN_FILES 2009-05-01 10:54:00 +02:00
blackfin
cris
frv FRV: Use __INIT macro instead of .text.init. 2009-04-27 19:46:30 -07:00
h8300
ia64 [IA64] xen_domu_defconfig: fix build issues/warnings 2009-05-05 11:43:13 -07:00
m32r m32r: use __stringify() macro in assembler.h 2009-05-02 22:38:21 +09:00
m68k m68k: arch/m68k/kernel/sun3-head.S needs <linux/init.h> 2009-04-28 16:07:18 -07:00
m68knommu Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu 2009-04-24 08:45:53 -07:00
microblaze Merge branch 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze 2009-05-08 16:24:25 -07:00
mips
mn10300 mn10300: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
parisc
powerpc Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2009-05-05 08:25:37 -07:00
s390 s390: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:39 -07:00
sh sh: Use __INIT macro instead of .text.init. 2009-04-27 19:51:58 -07:00
sparc sparc: cleanup references to deprecated .text.init* sections. 2009-04-27 19:51:58 -07:00
um
x86 x86: mtrr: Fix high_width computation when phys-addr is >= 44bit 2009-05-11 11:40:43 +02:00
xtensa xtensa: convert to use __HEAD and HEAD_TEXT macros. 2009-04-26 09:20:38 -07:00
.gitignore
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