Some older gccs (<GCC 7), when invoked with -fsanitize-coverage=trace-pc,
cause a spurious uninitialised variable warning in dt_cpu_ftrs.c:
arch/powerpc/kernel/dt_cpu_ftrs.c: In function ‘cpufeatures_process_feature’:
arch/powerpc/kernel/dt_cpu_ftrs.c:686:7: warning: ‘m’ may be used
uninitialized in this function [-Wmaybe-uninitialized]
if (m->cpu_ftr_bit_mask)
An upcoming patch will enable support for kcov, which requires
-fsanitize-coverage=trace-pc.
Work around this by explicitly initialising m to NULL.
Signed-off-by: Andrew Donnellan <andrew.donnel...@au1.ibm.com>
---
arch/powerpc/kernel/dt_cpu_ftrs.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c
b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 8be3721d9302..2192b2114513 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -658,7 +658,7 @@ static void __init cpufeatures_setup_start(u32 isa)
static bool __init cpufeatures_process_feature(struct dt_cpu_feature *f)
{
- const struct dt_cpu_feature_match *m;
+ const struct dt_cpu_feature_match *m = NULL;
bool known = false;
int i;
--
2.11.0
