1
linux/arch
Linus Torvalds 4710bcce8e i386: remove bogus mtrr range check
Commit 9215da3320 "fixed" the MTRR range
check to not allow any MTRR's under the 1MB mark (since that's where the
fixed MTRR's are active).

However, that was totally bogus, since it's normal (and almost required)
to have a large variable MTRR that starts at 0, and covers some large
percentage of the whole RAM, and then using the fixed MTRR's to override
that large MTRR to handle the special ISA hole in the 640k-1M region.

The old check was bogus too (checking that no variable MTRR is used that
is entirely under the 1MB range), but at least it wasn't actively
detrimental, because no sane situation would ever trigger such MTRR
usage in the first place.

That said, the whole notion of not allowing variable MTRR's in the low
1MB is just stupid, so rather than revert the commit, this just removes
the whole sad and unnecessary check entirely.

Cc: Jan Beulich <jbeulich@novell.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Luca Palermo <darkmage@sabayonlinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-01 10:56:11 -07:00
..
alpha alpha: fix alignment problem in csum_ipv6_magic() 2007-06-24 08:59:11 -07:00
arm Introduce fixed sys_sync_file_range2() syscall, implement on PowerPC and ARM 2007-06-28 11:38:30 -07:00
arm26 all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
avr32 [AVR32] Update defconfigs 2007-06-23 15:43:48 +02:00
blackfin Blackfin arch: match kernel startup messaage with new linker script 2007-06-21 11:34:16 +08:00
cris
frv all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
h8300 h8300 trival patches 2007-06-01 08:18:29 -07:00
i386 i386: remove bogus mtrr range check 2007-07-01 10:56:11 -07:00
ia64 [IA64] Make SN2 PCI code use ioremap rather than manually mangle the address 2007-06-26 13:35:45 -07:00
m32r all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
m68k x86_64: Quieten Atari keyboard warnings in Kconfig 2007-06-20 14:27:26 -07:00
m68knommu m68knommu: fix ColdFire timer off by 1 2007-06-08 17:23:32 -07:00
mips mips-jazz: correct flags for timer io resource 2007-06-28 11:38:19 -07:00
parisc [PARISC] unwinder improvements 2007-06-21 17:46:22 -04:00
powerpc Fix VDSO gettimeofday() when called with NULL struct timeval. 2007-06-29 21:27:00 -07:00
ppc potential parse error in ifdef part 3 2007-06-08 17:23:33 -07:00
s390 [S390] Add oops_enter()/oops_exit() calls to die(). 2007-06-19 13:10:20 +02:00
sh sh: Handle -ERESTART_RESTARTBLOCK for restartable syscalls. 2007-06-19 12:33:21 +09:00
sh64 sh64: Handle -ERESTART_RESTARTBLOCK for restartable syscalls. 2007-06-19 12:41:32 +09:00
sparc [SPARC32]: Build fix. 2007-05-31 01:52:51 -07:00
sparc64 [SPARC64]: Need to set state to IDLE during sun4v IRQ enable. 2007-06-26 00:13:31 -07:00
um uml: remove PAGE_SIZE from libc code 2007-06-16 13:16:16 -07:00
v850 all-archs: consolidate .data section definition in asm-generic 2007-05-19 09:11:57 +02:00
x86_64 x86_64 irq: use mask/unmask and proper locking in fixup_irqs() 2007-06-26 16:54:29 -07:00
xtensa [XTENSA] Remove non-rt signal handling 2007-05-31 17:49:32 -07:00