[PATCH] x86/xen: silence smatch warning in pmu_msr_chk_emulated()

From: Juergen Gross
Date: Thu Oct 20 2022 - 07:38:39 EST


Commit 8714f7bcd3c2 ("xen/pv: add fault recovery control to pmu msr
accesses") introduced code resulting in a warning issued by the smatch
static checker, claiming to use an uninitialized variable.

This is a false positive, but work around the warning nevertheless.

Fixes: 8714f7bcd3c2 ("xen/pv: add fault recovery control to pmu msr accesses")
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
arch/x86/xen/pmu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/pmu.c b/arch/x86/xen/pmu.c
index 68aff1382872..898a252ed6f1 100644
--- a/arch/x86/xen/pmu.c
+++ b/arch/x86/xen/pmu.c
@@ -302,7 +302,7 @@ static bool xen_amd_pmu_emulate(unsigned int msr, u64 *val, bool is_read)
static bool pmu_msr_chk_emulated(unsigned int msr, uint64_t *val, bool is_read,
bool *emul)
{
- int type, index;
+ int type = 0, index = 0;

if (is_amd_pmu_msr(msr))
*emul = xen_amd_pmu_emulate(msr, val, is_read);
--
2.35.3