linux-kernel - Re: [PATCH 2/2] x86: Fix typo in MSR_IA32_MISC_ENABLE_LIMIT

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Date:	Fri, 9 May 2014 12:33:03 +0200
From:	Borislav Petkov <bp@...e.de>
To:	Andres Freund <andres@...razel.de>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org,
	"H. Peter Anvin" <hpa@...ux.intel.com>,
	Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andy Whitcroft <apw@...onical.com>,
	Joe Perches <joe@...ches.com>
Subject: Re: [PATCH 2/2] x86: Fix typo in MSR_IA32_MISC_ENABLE_LIMIT_CPUID
 macro

On Fri, May 09, 2014 at 09:57:30AM +0200, Borislav Petkov wrote:
> > diff --git a/arch/x86/include/uapi/asm/msr-index.h b/arch/x86/include/uapi/asm/msr-index.h
> > index c827ace..fcf2b3a 100644
> > --- a/arch/x86/include/uapi/asm/msr-index.h
> > +++ b/arch/x86/include/uapi/asm/msr-index.h
> > @@ -384,7 +384,7 @@
> >  #define MSR_IA32_MISC_ENABLE_MWAIT_BIT			18
> >  #define MSR_IA32_MISC_ENABLE_MWAIT			(1ULL << MSR_IA32_MISC_ENABLE_MWAIT_BIT)
> >  #define MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT		22
> > -#define MSR_IA32_MISC_ENABLE_LIMIT_CPUID		(1ULL << MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT);
> > +#define MSR_IA32_MISC_ENABLE_LIMIT_CPUID		(1ULL << MSR_IA32_MISC_ENABLE_LIMIT_CPUID_BIT)

Btw, we should probably be catching typos like that with checkpatch.
Here's an initial version for single-line macros:

---
From: Borislav Petkov <bp@...e.de>
Subject: [PATCH] checkpatch: Catch trailing semicolons in macro definitions

This currently checks only single-line macro definitions. I.e.,

$ git show c0a639ad0bc6b178b46996bd1f821a04643e2bde | ./scripts/checkpatch.pl -

...
WARNING: Trailing semicolon at macro definition
+#define MSR_IA32_MISC_ENABLE_LIMIT_CPUID       (1ULL << MSR_BIT_LIMIT_CPUID);

Signed-off-by: Borislav Petkov <bp@...e.de>
---
 scripts/checkpatch.pl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 34eb2160489d..04929c20c9b5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -3313,6 +3313,11 @@ sub process {
 			}
 		}
 
+		if ($line =~ /^\+\s*#\s*define\s.*;\s*$/) {
+			WARN("TRAILING_SEMICOLON",
+			     "Trailing semicolon at macro definition\n" . $herecurr);
+		}
+
 # check for multiple assignments
 		if ($line =~ /^.\s*$Lval\s*=\s*$Lval\s*=(?!=)/) {
 			CHK("MULTIPLE_ASSIGNMENTS",
-- 
1.9.0

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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