Use g_new() & friends where that makes obvious sense

g_new(T, n) is neater than g_malloc(sizeof(T) * n).  It's also safer,
for two reasons.  One, it catches multiplication overflowing size_t.
Two, it returns T * rather than void *, which lets the compiler catch
more type errors.

This commit only touches allocations with size arguments of the form
sizeof(T).

Patch created mechanically with:

    $ spatch --in-place --sp-file scripts/coccinelle/use-g_new-etc.cocci \
	     --macro-file scripts/cocci-macro-file.h FILES...

The previous iteration was commit a95942b50c.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20220923084254.4173111-1-armbru@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

hw/remote/iommu.c

@@ -47,7 +47,7 @@ static AddressSpace *remote_iommu_find_add_as(PCIBus *pci_bus,
     elem = g_hash_table_lookup(iommu->elem_by_devfn, INT2VOIDP(devfn));
 
     if (!elem) {
-        elem = g_malloc0(sizeof(RemoteIommuElem));
+        elem = g_new0(RemoteIommuElem, 1);
         g_hash_table_insert(iommu->elem_by_devfn, INT2VOIDP(devfn), elem);
     }
 

hw/virtio/virtio-crypto.c

@@ -710,7 +710,7 @@ virtio_crypto_handle_asym_req(VirtIOCrypto *vcrypto,
     uint8_t *src = NULL;
     uint8_t *dst = NULL;
 
-    asym_op_info = g_malloc0(sizeof(CryptoDevBackendAsymOpInfo));
+    asym_op_info = g_new0(CryptoDevBackendAsymOpInfo, 1);
     src_len = ldl_le_p(&req->para.src_data_len);
     dst_len = ldl_le_p(&req->para.dst_data_len);
 

migration/dirtyrate.c

@@ -119,9 +119,9 @@ static DirtyPageRecord *vcpu_dirty_stat_alloc(VcpuStat *stat)
     }
 
     stat->nvcpu = nvcpu;
-    stat->rates = g_malloc0(sizeof(DirtyRateVcpu) * nvcpu);
+    stat->rates = g_new0(DirtyRateVcpu, nvcpu);
 
-    records = g_malloc0(sizeof(DirtyPageRecord) * nvcpu);
+    records = g_new0(DirtyPageRecord, nvcpu);
 
     return records;
 }

softmmu/dirtylimit.c

@@ -154,7 +154,7 @@ void vcpu_dirty_rate_stat_initialize(void)
 
     vcpu_dirty_rate_stat->stat.nvcpu = max_cpus;
     vcpu_dirty_rate_stat->stat.rates =
-        g_malloc0(sizeof(DirtyRateVcpu) * max_cpus);
+        g_new0(DirtyRateVcpu, max_cpus);
 
     vcpu_dirty_rate_stat->running = false;
 }
@@ -198,7 +198,7 @@ void dirtylimit_state_initialize(void)
     dirtylimit_state = g_malloc0(sizeof(*dirtylimit_state));
 
     dirtylimit_state->states =
-            g_malloc0(sizeof(VcpuDirtyLimitState) * max_cpus);
+            g_new0(VcpuDirtyLimitState, max_cpus);
 
     for (i = 0; i < max_cpus; i++) {
         dirtylimit_state->states[i].cpu_index = i;