linux-kernel - [tip: x86/msr] x86/msr: Add compatibility wrappers for rdmsrl()/wrmsrl()

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Message-ID: <174457056267.31282.9550644254346313322.tip-bot2@tip-bot2>
Date: Sun, 13 Apr 2025 18:56:02 -0000
From: "tip-bot2 for Ingo Molnar" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Ingo Molnar <mingo@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Juergen Gross <jgross@...e.com>, Dave Hansen <dave.hansen@...el.com>,
 Xin Li <xin@...or.com>, Linus Torvalds <torvalds@...ux-foundation.org>,
 linux-kernel@...r.kernel.org, x86@...nel.org
Subject:
 [tip: x86/msr] x86/msr: Add compatibility wrappers for rdmsrl()/wrmsrl()

The following commit has been merged into the x86/msr branch of tip:

Commit-ID:     a5447e92e169dafaf02fd653500105c7186d7128
Gitweb:        https://git.kernel.org/tip/a5447e92e169dafaf02fd653500105c7186d7128
Author:        Ingo Molnar <mingo@...nel.org>
AuthorDate:    Sun, 13 Apr 2025 20:43:16 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Sun, 13 Apr 2025 20:50:38 +02:00

x86/msr: Add compatibility wrappers for rdmsrl()/wrmsrl()

To reduce the impact of the API renames in -next, add compatibility
wrappers for the two most popular MSR access APIs: rdmsrl() and wrmsrl().

Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Juergen Gross <jgross@...e.com>
Cc: Dave Hansen <dave.hansen@...el.com>
Cc: Xin Li <xin@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org
---
 arch/x86/include/asm/msr.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 20deb58..2ccc78e 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -396,5 +396,10 @@ static inline int wrmsr_safe_regs_on_cpu(unsigned int cpu, u32 regs[8])
 	return wrmsr_safe_regs(regs);
 }
 #endif  /* CONFIG_SMP */
+
+/* Compatibility wrappers: */
+#define rdmsrl(msr, val) rdmsrq(msr, val)
+#define wrmsrl(msr, val) wrmsrq(msr, val)
+
 #endif /* __ASSEMBLER__ */
 #endif /* _ASM_X86_MSR_H */