x86/xen: silence smatch warning in pmu_msr_chk_emulated()

Commit 58ae6bb9f9d2 ("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: 58ae6bb9f9d2 ("xen/pv: add fault recovery control to pmu msr accesses")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

diff --git a/arch/x86/xen/pmu.c b/arch/x86/xen/pmu.c
index 68aff138287282b7e8e878f644c80bee5cad54a5..246d67dab5109d1b98200a821aa4cd1c79dfcb1e 100644 (file)
--- 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, index = 0;
 
        if (is_amd_pmu_msr(msr))
                *emul = xen_amd_pmu_emulate(msr, val, is_read);