From: Juergen Gross <jgross@suse.com>
Date: Wed, 25 Aug 2021 11:31:58 +0000 (+0200)
Subject: xen: remove stray preempt_disable() from PV AP startup code
X-Git-Tag: v5.15~113^2~34
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=58e636039b512697554b579c2bb23774061877f5;p=platform%2Fkernel%2Flinux-starfive.git

xen: remove stray preempt_disable() from PV AP startup code

In cpu_bringup() there is a call of preempt_disable() without a paired
preempt_enable(). This is not needed as interrupts are off initially.
Additionally this will result in early boot messages like:

BUG: scheduling while atomic: swapper/1/0/0x00000002

Signed-off-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20210825113158.11716-1-jgross@suse.com
Signed-off-by: Juergen Gross <jgross@suse.com>
---

diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
index c2ac319..96afadf 100644
--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -64,7 +64,6 @@ static void cpu_bringup(void)
 	cr4_init();
 	cpu_init();
 	touch_softlockup_watchdog();
-	preempt_disable();
 
 	/* PVH runs in ring 0 and allows us to do native syscalls. Yay! */
 	if (!xen_feature(XENFEAT_supervisor_mode_kernel)) {