aboutsummaryrefslogtreecommitdiffstats
path: root/include/asm-i386/mce.h
diff options
context:
space:
mode:
authorAndi Kleen <ak@suse.de>2007-07-22 11:12:32 +0200
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-22 11:03:37 -0700
commit8f4e956b313dcccbc7be6f10808952345e3b638c (patch)
treecc8c93fa1faf5e0b608e3a21330a32bd82fe6f47 /include/asm-i386/mce.h
parent19d36ccdc34f5ed444f8a6af0cbfdb6790eb1177 (diff)
downloadkernel_samsung_smdk4412-8f4e956b313dcccbc7be6f10808952345e3b638c.zip
kernel_samsung_smdk4412-8f4e956b313dcccbc7be6f10808952345e3b638c.tar.gz
kernel_samsung_smdk4412-8f4e956b313dcccbc7be6f10808952345e3b638c.tar.bz2
x86: Stop MCEs and NMIs during code patching
When a machine check or NMI occurs while multiple byte code is patched the CPU could theoretically see an inconsistent instruction and crash. Prevent this by temporarily disabling MCEs and returning early in the NMI handler. Based on discussion with Mathieu Desnoyers. Cc: Mathieu Desnoyers <compudj@krystal.dyndns.org> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-i386/mce.h')
-rw-r--r--include/asm-i386/mce.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-i386/mce.h b/include/asm-i386/mce.h
index b0a02ee..d56d897 100644
--- a/include/asm-i386/mce.h
+++ b/include/asm-i386/mce.h
@@ -5,3 +5,7 @@ extern void mcheck_init(struct cpuinfo_x86 *c);
#endif
extern int mce_disabled;
+
+extern void stop_mce(void);
+extern void restart_mce(void);
+