Properly initialise vaddr pointers in cpc_read() and cpc_write() to
NULL instead of 0.

This fixes the following sparse warnings:
drivers/acpi/cppc_acpi.c:937:31: warning: Using plain integer as NULL pointer
drivers/acpi/cppc_acpi.c:982:31: warning: Using plain integer as NULL pointer

Signed-off-by: Ionela Voinescu <[email protected]>
Cc: "Rafael J. Wysocki" <[email protected]>
Cc: Len Brown <[email protected]>
---
 drivers/acpi/cppc_acpi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index fd71020f5d5f..69057fcd2c04 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -934,7 +934,7 @@ int __weak cpc_write_ffh(int cpunum, struct cpc_reg *reg, 
u64 val)
 static int cpc_read(int cpu, struct cpc_register_resource *reg_res, u64 *val)
 {
        int ret_val = 0;
-       void __iomem *vaddr = 0;
+       void __iomem *vaddr = NULL;
        int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
        struct cpc_reg *reg = &reg_res->cpc_entry.reg;
 
@@ -979,7 +979,7 @@ static int cpc_read(int cpu, struct cpc_register_resource 
*reg_res, u64 *val)
 static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val)
 {
        int ret_val = 0;
-       void __iomem *vaddr = 0;
+       void __iomem *vaddr = NULL;
        int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
        struct cpc_reg *reg = &reg_res->cpc_entry.reg;
 
-- 
2.29.2.dirty

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