[PATCH 4/6] KVM: PPC: e500: Replace kzalloc() calls by kcalloc() in two functions

[SF Markus Elfring]

From: Markus Elfring <elfr...@users.sourceforge.net>
Date: Sun, 28 Aug 2016 18:30:38 +0200

* A multiplication for the size determination of a memory allocation
  indicated that an array data structure should be processed.
  Thus use the corresponding function "kcalloc".

  Suggested-by: Paolo Bonzini <pbonz...@redhat.com>

  This issue was detected also by using the Coccinelle software.

* Replace the specification of data structures by pointer dereferences
  to make the corresponding size determination a bit safer according to
  the Linux coding style convention.

Signed-off-by: Markus Elfring <elfr...@users.sourceforge.net>
---
 arch/powerpc/kvm/e500_mmu.c | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
index e9c19e9..2be2afc4 100644
--- a/arch/powerpc/kvm/e500_mmu.c
+++ b/arch/powerpc/kvm/e500_mmu.c
@@ -799,22 +799,21 @@ int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
                goto put_pages;
        }
 
-       privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0],
-                          GFP_KERNEL);
+       privs[0] = kcalloc(params.tlb_sizes[0], sizeof(*privs[0]), GFP_KERNEL);
        if (!privs[0]) {
                ret = -ENOMEM;
                goto put_pages;
        }
 
-       privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1],
-                          GFP_KERNEL);
+       privs[1] = kcalloc(params.tlb_sizes[1], sizeof(*privs[1]), GFP_KERNEL);
        if (!privs[1]) {
                ret = -ENOMEM;
                goto free_privs_first;
        }
 
-       g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1],
-                            GFP_KERNEL);
+       g2h_bitmap = kcalloc(params.tlb_sizes[1],
+                            sizeof(*g2h_bitmap),
+                            GFP_KERNEL);
        if (!g2h_bitmap) {
                ret = -ENOMEM;
                goto free_privs_second;
@@ -929,20 +928,20 @@ int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 
*vcpu_e500)
        vcpu_e500->gtlb_offset[0] = 0;
        vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE;
 
-       vcpu_e500->gtlb_priv[0] = kzalloc(sizeof(struct tlbe_ref) *
-                                         vcpu_e500->gtlb_params[0].entries,
+       vcpu_e500->gtlb_priv[0] = kcalloc(vcpu_e500->gtlb_params[0].entries,
+                                         sizeof(struct tlbe_ref),
                                          GFP_KERNEL);
        if (!vcpu_e500->gtlb_priv[0])
                goto err;
 
-       vcpu_e500->gtlb_priv[1] = kzalloc(sizeof(struct tlbe_ref) *
-                                         vcpu_e500->gtlb_params[1].entries,
+       vcpu_e500->gtlb_priv[1] = kcalloc(vcpu_e500->gtlb_params[1].entries,
+                                         sizeof(struct tlbe_ref),
                                          GFP_KERNEL);
        if (!vcpu_e500->gtlb_priv[1])
                goto err;
 
-       vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(u64) *
-                                         vcpu_e500->gtlb_params[1].entries,
+       vcpu_e500->g2h_tlb1_map = kcalloc(vcpu_e500->gtlb_params[1].entries,
+                                         sizeof(*vcpu_e500->g2h_tlb1_map),
                                          GFP_KERNEL);
        if (!vcpu_e500->g2h_tlb1_map)
                goto err;
-- 
2.9.3