From 613623b6fd1f09c2a8ee16739f823d826e3c0c77 Mon Sep 17 00:00:00 2001 From: Juergen Gross Date: Fri, 2 Oct 2015 13:44:04 +0200 Subject: [PATCH] use masking operation instead of test_bit for VGCF bits Use a bit mask for testing of a set bit instead of test_bit in case no atomic operation is needed, as this will lead to smaller and more effective code. Signed-off-by: Juergen Gross Reviewed-by: Jan Beulich Reviewed-by: Andrew Cooper --- xen/arch/x86/domain.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c index dc3bb08da3..4e96f6ca5a 100644 --- a/xen/arch/x86/domain.c +++ b/xen/arch/x86/domain.c @@ -1352,7 +1352,7 @@ static void load_segments(struct vcpu *n) domain_crash(n->domain); } - if ( test_bit(_VGCF_failsafe_disables_events, &n->arch.vgc_flags) ) + if ( n->arch.vgc_flags & VGCF_failsafe_disables_events ) vcpu_info(n, evtchn_upcall_mask) = 1; regs->entry_vector |= TRAP_syscall; @@ -1394,7 +1394,7 @@ static void load_segments(struct vcpu *n) domain_crash(n->domain); } - if ( test_bit(_VGCF_failsafe_disables_events, &n->arch.vgc_flags) ) + if ( n->arch.vgc_flags & VGCF_failsafe_disables_events ) vcpu_info(n, evtchn_upcall_mask) = 1; regs->entry_vector |= TRAP_syscall; -- 2.30.2