Prarit Bhargava d6be118a97 x86: fix memmap=exactmap boot argument ... When using kdump modifying the e820 map is yielding strange results. For example starting with BIOS-provided physical RAM map: BIOS-e820: 0000000000000100 - 0000000000093400 (usable) BIOS-e820: 0000000000093400 - 00000000000a0000 (reserved) BIOS-e820: 0000000000100000 - 000000003fee0000 (usable) BIOS-e820: 000000003fee0000 - 000000003fef3000 (ACPI data) BIOS-e820: 000000003fef3000 - 000000003ff80000 (ACPI NVS) BIOS-e820: 000000003ff80000 - 0000000040000000 (reserved) BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved) BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved) BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved) BIOS-e820: 00000000ff000000 - 0000000100000000 (reserved) and booting with args memmap=exactmap memmap=640K@0K memmap=5228K@16384K memmap=125188K@22252K memmap=76K#1047424K memmap=564K#1047500K resulted in: user-defined physical RAM map: user: 0000000000000000 - 0000000000093400 (usable) user: 0000000000093400 - 00000000000a0000 (reserved) user: 0000000000100000 - 000000003fee0000 (usable) user: 000000003fee0000 - 000000003fef3000 (ACPI data) user: 000000003fef3000 - 000000003ff80000 (ACPI NVS) user: 000000003ff80000 - 0000000040000000 (reserved) user: 00000000e0000000 - 00000000f0000000 (reserved) user: 00000000fec00000 - 00000000fec10000 (reserved) user: 00000000fee00000 - 00000000fee01000 (reserved) user: 00000000ff000000 - 0000000100000000 (reserved) But should have resulted in: user-defined physical RAM map: user: 0000000000000000 - 00000000000a0000 (usable) user: 0000000001000000 - 000000000151b000 (usable) user: 00000000015bb000 - 0000000008ffc000 (usable) user: 000000003fee0000 - 000000003ff80000 (ACPI data) This is happening because of an improper usage of strcmp() in the e820 parsing code. The strcmp() always returns !0 and never resets the value for e820.nr_map and returns an incorrect user-defined map. This patch fixes the problem. Signed-off-by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2008-09-09 11:54:53 -07:00
..
boot	x86: boot: stub out unimplemented CPU feature words	2008-09-05 16:13:44 -07:00
configs	x86: update defconfigs	2008-08-27 08:14:17 +02:00
crypto
ia32	tracehook: exec	2008-07-26 12:00:08 -07:00
kernel	x86: fix memmap=exactmap boot argument	2008-09-09 11:54:53 -07:00
kvm	KVM: MMU: Fix torn shadow pte	2008-08-25 17:24:27 +03:00
lguest	lguest: set max_pfn_mapped, growl loudly at Yinghai Lu	2008-07-29 09:58:31 +10:00
lib	x86: msr: propagate errors from smp_call_function_single()	2008-08-25 17:45:48 -07:00
mach-default	x86: add ->pre_time_init to x86_quirks	2008-07-20 09:25:52 +02:00
mach-es7000	x86: move the last Dprintk instance to pr_debug()	2008-07-21 21:58:34 +02:00
mach-generic
mach-rdc321x	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
mach-voyager	Merge branch 'generic-ipi' into generic-ipi-for-linus	2008-07-15 21:55:59 +02:00
math-emu
mm	x86: fix two modpost warnings in mm/init_64.c	2008-08-22 07:51:54 +02:00
oprofile	x86: fix oprofile + hibernation badness	2008-08-20 16:18:31 +02:00
pci	Un-break printk strings in x86 PCI probing code	2008-09-02 10:38:28 -07:00
power	x86: fix i486 suspend to disk CR4 oops	2008-08-18 08:50:19 +02:00
vdso	Merge branches 'x86/urgent', 'x86/amd-iommu', 'x86/apic', 'x86/cleanups', 'x86/core', 'x86/cpu', 'x86/fixmap', 'x86/gart', 'x86/kprobes', 'x86/memtest', 'x86/modules', 'x86/nmi', 'x86/pat', 'x86/reboot', 'x86/setup', 'x86/step', 'x86/unify-pci', 'x86/uv', 'x86/xen' and 'xen-64bit' into x86/for-linus	2008-07-21 16:37:17 +02:00
video
xen	x86, xen: Use native_pte_flags instead of native_pte_val for .pte_flags	2008-09-06 20:13:58 +02:00
Kconfig	[x86] Clean up MAXSMP Kconfig, and limit NR_CPUS to 512	2008-08-25 14:15:38 -07:00
Kconfig.cpu	x86: disable static NOPLs on 32 bits	2008-09-08 11:35:43 -07:00
Kconfig.debug	x86: Fix help message for STRICT_DEVMEM config option	2008-07-21 13:04:08 -07:00
Makefile	x86, RDC321x: add to mach-default	2008-07-26 13:51:46 +02:00
Makefile_32.cpu