linux-kernel - [PATCH 2/2] xen: make HYPERVISOR_set_debugreg() always

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Date:   Thu, 25 Nov 2021 10:20:56 +0100
From:   Juergen Gross <jgross@...e.com>
To:     xen-devel@...ts.xenproject.org, x86@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     peterz@...radead.org, Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, kernel test robot <lkp@...el.com>
Subject: [PATCH 2/2] xen: make HYPERVISOR_set_debugreg() always_inline

HYPERVISOR_set_debugreg() is being called from noinstr code, so it
should be attributed "always_inline".

Fixes: 7361fac0465ba96ec8f ("x86/xen: Make set_debugreg() noinstr")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Juergen Gross <jgross@...e.com>
---
 arch/x86/include/asm/xen/hypercall.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/xen/hypercall.h b/arch/x86/include/asm/xen/hypercall.h
index 28ca1119606b..e5e0fe10c692 100644
--- a/arch/x86/include/asm/xen/hypercall.h
+++ b/arch/x86/include/asm/xen/hypercall.h
@@ -281,7 +281,7 @@ HYPERVISOR_callback_op(int cmd, void *arg)
 	return _hypercall2(int, callback_op, cmd, arg);
 }
 
-static inline int
+static __always_inline int
 HYPERVISOR_set_debugreg(int reg, unsigned long value)
 {
 	return _hypercall2(int, set_debugreg, reg, value);
-- 
2.26.2