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fix nmi_watchdog=2 bootup hang 

wrmsrl() is broken, dropping the upper 32bits of the value to be
written. This broke the NMI watchdog on AMD hardware. (and it
probably broke other code too.)

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Björn Steinbrink 2007-06-25 23:04:37 +02:00 committed by Linus Torvalds
parent 189548642c
commit b9e3614f44
1 changed files with 1 additions and 1 deletions
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2
include/asm-i386/paravirt.h
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@ -539,7 +539,7 @@ static inline int paravirt_write_msr(unsigned msr, unsigned low, unsigned high)
val = paravirt_read_msr(msr, &_err); \
} while(0)
#define wrmsrl(msr,val) ((void)paravirt_write_msr(msr, val, 0))
#define wrmsrl(msr,val) wrmsr(msr, (u32)((u64)(val)), ((u64)(val))>>32)
#define wrmsr_safe(msr,a,b) paravirt_write_msr(msr, a, b)
/* rdmsr with exception handling */