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46cb27f516
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Yinghai Lu 46cb27f516 x86: check range in reserve_early() 
Impact: cleanup

one 32-bit system reports:

BIOS-provided physical RAM map:
 BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
 BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
 BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
 BIOS-e820: 0000000000100000 - 000000001c000000 (usable)
 BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
DMI 2.0 present.
last_pfn = 0x1c000 max_arch_pfn = 0x100000
kernel direct mapping tables up to 1c000000 @ 7000-c000
..
RAMDISK: 1bc69000 - 1bfef4fa
..
0MB HIGHMEM available.
448MB LOWMEM available.
  mapped low ram: 0 - 1c000000
  low ram: 00000000 - 1c000000
  bootmap 00002000 - 00005800
(9 early reservations) ==> bootmem [0000000000 - 001c000000]
  #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 - 0000001000]
  #1 [0000001000 - 0000002000]    EX TRAMPOLINE ==> [0000001000 - 0000002000]
  #2 [0000006000 - 0000007000]       TRAMPOLINE ==> [0000006000 - 0000007000]
  #3 [0000400000 - 00009ed14c]    TEXT DATA BSS ==> [0000400000 - 00009ed14c]
  #4 [001bc69000 - 001bfef4fa]          RAMDISK ==> [001bc69000 - 001bfef4fa]
  #5 [00009ee000 - 00009f2000]    INIT_PG_TABLE ==> [00009ee000 - 00009f2000]
  #6 [000009f400 - 0000100000]    BIOS reserved ==> [000009f400 - 0000100000]
  #7 [0000007000 - 0000007000]          PGTABLE
  #8 [0000002000 - 0000006000]          BOOTMAP ==> [0000002000 - 0000006000]

Notice the strange blank PGTABLE entry.

The reason is init_pg_table is big enough, and zero range is called
with init_memory_mapping/reserve_early().

So try to check the range in reserve_early()

v2: fix the reversed compare

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: nickpiggin@yahoo.com.au
Cc: ink@jurassic.park.msu.ru
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-02-24 22:43:15 +01:00
..
alpha Merge branch 'x86/urgent' into x86/core 2009-02-20 17:40:43 +01:00
arm Merge branch 'x86/urgent' into x86/core 2009-02-20 17:40:43 +01:00
avr32 Merge branch 'x86/urgent' into x86/core 2009-02-20 17:40:43 +01:00
blackfin Merge branch 'core/header-fixes' into x86/headers 2009-02-13 21:05:03 +01:00
cris Merge branch 'syscalls' of git://git390.osdl.marist.edu/pub/scm/linux-2.6 2009-01-14 19:58:40 -08:00
frv FRV: in_interrupt() requires #inclusion of linux/hardirq.h not asm/hardirq.h now 2009-02-09 08:51:35 -08:00
h8300 headers_check fix: h8300, swab.h 2009-02-01 11:01:24 +05:30
ia64 Merge branch 'x86/urgent' into x86/core 2009-02-20 17:40:43 +01:00
m32r eeprom: More consistent symbol names 2009-01-26 21:19:57 +01:00
m68k m68knommu: remove the no longer used PCI support option 2009-01-27 16:42:02 +10:00
m68knommu m68knommu: fix 5329 ColdFire periphal addressing 2009-01-27 16:42:03 +10:00
mips Merge branch 'core/header-fixes' into x86/headers 2009-02-13 21:05:03 +01:00
mn10300 Merge branch 'x86/mm' into core/percpu 2009-01-21 10:39:51 +01:00
parisc Merge branch 'core/header-fixes' into x86/headers 2009-02-13 21:05:03 +01:00
powerpc Merge branch 'x86/urgent' into x86/core 2009-02-20 17:40:43 +01:00
s390 [S390] fix "mem=" handling in case of standby memory 2009-02-19 15:19:19 +01:00
sh sh: Fix up T-bit error handling in SH-4A mutex fastpath. 2009-01-29 11:56:03 +09:00
sparc Merge branch 'linus' into x86/apic 2009-02-13 09:44:22 +01:00
um mm: invoke oom-killer from page fault 2009-01-06 15:58:58 -08:00
x86 x86: check range in reserve_early() 2009-02-24 22:43:15 +01:00
xtensa headers_check fix: xtensa, swab.h 2009-02-01 11:01:30 +05:30
.gitignore
Kconfig [CVE-2009-0029] System call wrapper infrastructure 2009-01-14 14:15:16 +01:00