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authorEric W. Biederman <ebiederm@xmission.com>2005-06-25 17:57:41 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 19:24:46 -0400
commit9635b47d910223745258768418003580ef7dba17 (patch)
treeb61adfddad3bf3069c9fa379b34805420b4ef85c /include/asm-i386/apic.h
parent8f43d03fe2c4962c11d8227ac9505e590bad758b (diff)
[PATCH] kexec: x86: local apic fix
From: "Maciej W. Rozycki" <macro@linux-mips.org> Fix a kexec problem whcih causes local APIC detection failure. The problem is detect_init_APIC() is called early, before the command line have been processed. Therefore "lapic" (and "nolapic") have not been seen, yet. Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Eric Biederman <ebiederm@xmission.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386/apic.h')
-rw-r--r--include/asm-i386/apic.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/asm-i386/apic.h b/include/asm-i386/apic.h
index a5810cf7b578..53268cd9306e 100644
--- a/include/asm-i386/apic.h
+++ b/include/asm-i386/apic.h
@@ -5,6 +5,7 @@
5#include <linux/pm.h> 5#include <linux/pm.h>
6#include <asm/fixmap.h> 6#include <asm/fixmap.h>
7#include <asm/apicdef.h> 7#include <asm/apicdef.h>
8#include <asm/processor.h>
8#include <asm/system.h> 9#include <asm/system.h>
9 10
10#define Dprintk(x...) 11#define Dprintk(x...)
@@ -16,8 +17,20 @@
16#define APIC_VERBOSE 1 17#define APIC_VERBOSE 1
17#define APIC_DEBUG 2 18#define APIC_DEBUG 2
18 19
20extern int enable_local_apic;
19extern int apic_verbosity; 21extern int apic_verbosity;
20 22
23static inline void lapic_disable(void)
24{
25 enable_local_apic = -1;
26 clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability);
27}
28
29static inline void lapic_enable(void)
30{
31 enable_local_apic = 1;
32}
33
21/* 34/*
22 * Define the default level of output to be very little 35 * Define the default level of output to be very little
23 * This can be turned up by using apic=verbose for more 36 * This can be turned up by using apic=verbose for more