Messages in this thread Patch in this message | | | Date | Fri, 9 May 2014 09:31:17 -0700 | From | tip-bot for Andres Freund <> | Subject | [tip:x86/urgent] x86: Fix typo preventing msr_set/ clear_bit from having an effect |
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Commit-ID: 722a0d22d028bd74061cf582de1764884e73674f Gitweb: http://git.kernel.org/tip/722a0d22d028bd74061cf582de1764884e73674f Author: Andres Freund <andres@anarazel.de> AuthorDate: Fri, 9 May 2014 03:29:16 +0200 Committer: H. Peter Anvin <hpa@zytor.com> CommitDate: Fri, 9 May 2014 08:42:32 -0700
x86: Fix typo preventing msr_set/clear_bit from having an effect
Due to a typo the msr accessor function introduced in 22085a66c2fab6cf9b9393c056a3600a6b4735de didn't have any lasting effects because they accidentally wrote the old value back.
After c0a639ad0bc6b178b46996bd1f821a04643e2bde this at the very least this causes cpuid limits not to be lifted on some cpus leading to missing capabilities for those.
Signed-off-by: Andres Freund <andres@anarazel.de> Link: http://lkml.kernel.org/r/1399598957-7011-2-git-send-email-andres@anarazel.de Cc: Borislav Petkov <bp@suse.de> Signed-off-by: H. Peter Anvin <hpa@zytor.com> --- arch/x86/lib/msr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/lib/msr.c b/arch/x86/lib/msr.c index db9db44..4362373 100644 --- a/arch/x86/lib/msr.c +++ b/arch/x86/lib/msr.c @@ -76,7 +76,7 @@ static inline int __flip_bit(u32 msr, u8 bit, bool set) if (m1.q == m.q) return 0; - err = msr_write(msr, &m); + err = msr_write(msr, &m1); if (err) return err;
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