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| author | Daniel Gollub <dgollub@suse.de> | 2007-08-15 02:40:35 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-18 10:25:25 -0700 |
| commit | 0328ecef9041fe477efc2404fd3aaa29e7ee0430 (patch) | |
| tree | 10384b404a1052df528d947e6c2269f10b3b4712 /arch/x86_64 | |
| parent | 8154549cb8ca795cbefda404cd6120398e5b145f (diff) | |
| download | blackbird-obmc-linux-0328ecef9041fe477efc2404fd3aaa29e7ee0430.tar.gz blackbird-obmc-linux-0328ecef9041fe477efc2404fd3aaa29e7ee0430.zip | |
x86_64: Fix to keep watchdog disabled by default for i386/x86_64
Fixed wrong expression which enabled watchdogs even if nmi_watchdog kernel
parameter wasn't set. This regression got slightly introduced with commit
b7471c6da94d30d3deadc55986cc38d1ff57f9ca.
Introduced NMI_DISABLED (-1) which allows to switch the value of NMI_DEFAULT
without breaking the APIC NMI watchdog code (again).
Fixes:
https://bugzilla.novell.com/show_bug.cgi?id=298084
http://bugzilla.kernel.org/show_bug.cgi?id=7839
And likely some more nmi_watchdog=0 related issues.
Signed-off-by: Daniel Gollub <dgollub@suse.de>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64')
| -rw-r--r-- | arch/x86_64/kernel/nmi.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86_64/kernel/nmi.c b/arch/x86_64/kernel/nmi.c index cb8ee9d02f86..0ec6d2ddb931 100644 --- a/arch/x86_64/kernel/nmi.c +++ b/arch/x86_64/kernel/nmi.c @@ -85,7 +85,7 @@ int __init check_nmi_watchdog (void) int *counts; int cpu; - if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DEFAULT)) + if ((nmi_watchdog == NMI_NONE) || (nmi_watchdog == NMI_DISABLED)) return 0; if (!atomic_read(&nmi_active)) @@ -442,7 +442,7 @@ int proc_nmi_enabled(struct ctl_table *table, int write, struct file *file, if (!!old_state == !!nmi_watchdog_enabled) return 0; - if (atomic_read(&nmi_active) < 0) { + if (atomic_read(&nmi_active) < 0 || nmi_watchdog == NMI_DISABLED) { printk( KERN_WARNING "NMI watchdog is permanently disabled\n"); return -EIO; } |
