linux-kernel - [PATCH 5.10 570/663] x86/entry: Fix instrumentation annotation

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Message-Id: <20210301161210.070497598@linuxfoundation.org>
Date:   Mon,  1 Mar 2021 17:13:38 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Kees Cook <keescook@...omium.org>
Subject: [PATCH 5.10 570/663] x86/entry: Fix instrumentation annotation

From: Thomas Gleixner <tglx@...utronix.de>

commit 15f720aabe71a5662c4198b22532d95bbeec80ef upstream.

Embracing a callout into instrumentation_begin() / instrumentation_begin()
does not really make sense. Make the latter instrumentation_end().

Fixes: 2f6474e4636b ("x86/entry: Switch XEN/PV hypercall entry to IDTENTRY")
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Kees Cook <keescook@...omium.org>
Cc: stable@...r.kernel.org
Link: https://lore.kernel.org/r/20210210002512.106502464@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/x86/entry/common.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -304,7 +304,7 @@ __visible noinstr void xen_pv_evtchn_do_
 
 	instrumentation_begin();
 	run_on_irqstack_cond(__xen_pv_evtchn_do_upcall, regs);
-	instrumentation_begin();
+	instrumentation_end();
 
 	set_irq_regs(old_regs);