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| author | David S. Miller <davem@davemloft.net> | 2011-12-06 21:10:05 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-06 21:10:05 -0500 |
| commit | 959327c7842e8621e28b89acea7d57ff02b60972 (patch) | |
| tree | b00de195fa401186228796abdcd16812862fbf4d /arch/x86/include/asm/msr.h | |
| parent | f84ea779c25dabc90956f1c329e5e5c501ea96cc (diff) | |
| parent | b835c0f47f725d864bf2545f10c733b754bb6d51 (diff) | |
| download | op-kernel-dev-959327c7842e8621e28b89acea7d57ff02b60972.zip op-kernel-dev-959327c7842e8621e28b89acea7d57ff02b60972.tar.gz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/x86/include/asm/msr.h')
| -rw-r--r-- | arch/x86/include/asm/msr.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h index 084ef95..95203d4 100644 --- a/arch/x86/include/asm/msr.h +++ b/arch/x86/include/asm/msr.h @@ -169,7 +169,14 @@ static inline int wrmsr_safe(unsigned msr, unsigned low, unsigned high) return native_write_msr_safe(msr, low, high); } -/* rdmsr with exception handling */ +/* + * rdmsr with exception handling. + * + * Please note that the exception handling works only after we've + * switched to the "smart" #GP handler in trap_init() which knows about + * exception tables - using this macro earlier than that causes machine + * hangs on boxes which do not implement the @msr in the first argument. + */ #define rdmsr_safe(msr, p1, p2) \ ({ \ int __err; \ |
