From: Juergen Gross jgross@suse.com
[ Upstream commit 58e636039b512697554b579c2bb23774061877f5 ]
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 Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/xen/smp_pv.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c index 41fd4c123165..7b6e56703bb9 100644 --- a/arch/x86/xen/smp_pv.c +++ b/arch/x86/xen/smp_pv.c @@ -59,7 +59,6 @@ static void cpu_bringup(void)
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)) {