From b9e3614f444f6546204f4538afcaa3ebe36d49f2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Steinbrink?= Date: Mon, 25 Jun 2007 23:04:37 +0200 Subject: [PATCH] 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 Signed-off-by: Linus Torvalds --- include/asm-i386/paravirt.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/asm-i386/paravirt.h b/include/asm-i386/paravirt.h index d7a0512f88e0..7f846a7d6bcc 100644 --- a/include/asm-i386/paravirt.h +++ b/include/asm-i386/paravirt.h @@ -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 */