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From: "Chang S. Bae" <chang.seok.bae@intel.com>
To: Andy Lutomirski <luto@kernel.org>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Markus T Metzger <markus.t.metzger@intel.com>,
	"Ravi V . Shankar" <ravi.v.shankar@intel.com>,
	"Chang S . Bae" <chang.seok.bae@intel.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 5/6] x86/msr: write_rdtscp_aux() to use wrmsr_safe()
Date: Mon,  4 Jun 2018 12:24:28 -0700	[thread overview]
Message-ID: <1528140269-26205-6-git-send-email-chang.seok.bae@intel.com> (raw)
In-Reply-To: <1528140269-26205-1-git-send-email-chang.seok.bae@intel.com>

Using wrmsr_safe() can make code a bit simpler by removing
some condition check

Suggested-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/include/asm/msr.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 04addd6..09bec62 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -317,7 +317,7 @@ static inline int wrmsrl_safe(u32 msr, u64 val)
 
 #define write_tsc(low, high) wrmsr(MSR_IA32_TSC, (low), (high))
 
-#define write_rdtscp_aux(val) wrmsr(MSR_TSC_AUX, (val), 0)
+#define write_rdtscp_aux(val) wrmsr_safe(MSR_TSC_AUX, (val), 0)
 
 struct msr *msrs_alloc(void);
 void msrs_free(struct msr *msrs);
-- 
2.7.4

  parent reply	other threads:[~2018-06-04 19:24 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-04 19:24 [PATCH 0/6] x86: infrastructure to enable FSGSBASE Chang S. Bae
2018-06-04 19:24 ` [PATCH 1/6] x86/fsgsbase/64: Introduce FS/GS base helper functions Chang S. Bae
2018-06-04 19:24 ` [PATCH 2/6] x86/fsgsbase/64: Make ptrace read FS/GS base accurately Chang S. Bae
2018-06-04 19:24 ` [PATCH 3/6] x86/fsgsbase/64: Use FS/GS base helpers in core dump Chang S. Bae
2018-06-04 19:24 ` [PATCH 4/6] x86/fsgsbase/64: Factor out load FS/GS segments from __switch_to Chang S. Bae
2018-06-04 19:24 ` Chang S. Bae [this message]
2018-06-04 19:24 ` [PATCH 6/6] x86/vdso: Move out the CPU number store Chang S. Bae
2018-06-05  3:57   ` Mika Penttilä
2018-06-05  4:44     ` Bae, Chang Seok
2018-06-05  5:19       ` Mika Penttilä
2018-06-05  5:36     ` H. Peter Anvin
2018-06-05  6:03       ` Mika Penttilä
2018-06-05 10:22       ` Andy Lutomirski
2018-06-13  6:53   ` [lkp-robot] [x86/vdso] ab1bcc4420: BUG:kernel_hang_in_boot_stage kernel test robot

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