[PATCH AUTOSEL 4.9 40/90] KVM: x86: fix incorrect comparison in trace event

From: Sasha Levin
Date: Thu Sep 17 2020 - 22:27:36 EST


From: Paolo Bonzini <pbonzini@xxxxxxxxxx>

[ Upstream commit 147f1a1fe5d7e6b01b8df4d0cbd6f9eaf6b6c73b ]

The "u" field in the event has three states, -1/0/1. Using u8 however means that
comparison with -1 will always fail, so change to signed char.

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
arch/x86/kvm/mmutrace.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h
index 756b14ecc957a..df1076b0eabf3 100644
--- a/arch/x86/kvm/mmutrace.h
+++ b/arch/x86/kvm/mmutrace.h
@@ -336,7 +336,7 @@ TRACE_EVENT(
/* These depend on page entry type, so compute them now. */
__field(bool, r)
__field(bool, x)
- __field(u8, u)
+ __field(signed char, u)
),

TP_fast_assign(
--
2.25.1