cocci: Do not initialize variable used by QLIST_FOREACH macro

The QLIST_FOREACH() macro, defined in "qemu/queue.h",
always assigns its iterator variable when entering the
loop. Remove the pointless and possibly misleading
assignment.

Mechanical patch using the following coccinelle spatch:

  @@
  type T;
  identifier e;
  iterator FOREACH_MACRO =~ ".*_FOREACH.*";
  statement S;
  @@
  -    T *e = ...;
  +    T *e;
       ... when != e
       FOREACH_MACRO(e, ...) S

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Message-Id: <20260415215539.92629-2-philmd@linaro.org>

block/blkio.c

@@ -124,7 +124,7 @@ blkio_do_alloc_bounce_buffer(BDRVBlkioState *s, BlkioBounceBuf *bounce,
                              int64_t bytes)
 {
     void *addr = s->bounce_pool.addr;
-    BlkioBounceBuf *cur = NULL;
+    BlkioBounceBuf *cur;
     BlkioBounceBuf *prev = NULL;
     ptrdiff_t space;
 

block/gluster.c

@@ -251,7 +251,7 @@ static void glfs_set_preopened(const char *volume, glfs_t *fs)
 
 static glfs_t *glfs_find_preopened(const char *volume)
 {
-    ListElement *entry = NULL;
+    ListElement *entry;
 
      QLIST_FOREACH(entry, &glfs_list, list) {
         if (strcmp(entry->saved.volume, volume) == 0) {
@@ -265,7 +265,7 @@ static glfs_t *glfs_find_preopened(const char *volume)
 
 static void glfs_clear_preopened(glfs_t *fs)
 {
-    ListElement *entry = NULL;
+    ListElement *entry;
     ListElement *next;
 
     if (fs == NULL) {

hw/arm/virt-acpi-build.c

@@ -146,7 +146,7 @@ static void acpi_dsdt_add_pci(Aml *scope, const MemMapEntry *memmap,
 {
     int ecam_id = VIRT_ECAM_ID(vms->highmem_ecam);
     bool cxl_present = false;
-    PCIBus *bus = vms->bus;
+    PCIBus *bus;
     bool acpi_pcihp = false;
 
     if (vms->acpi_dev) {

hw/i386/xen/xen-hvm.c

@@ -184,7 +184,7 @@ static void xen_ram_init(PCMachineState *pcms,
 static XenPhysmap *get_physmapping(hwaddr start_addr, ram_addr_t size,
                                    int page_mask)
 {
-    XenPhysmap *physmap = NULL;
+    XenPhysmap *physmap;
 
     start_addr &= page_mask;
 
@@ -200,7 +200,7 @@ static hwaddr xen_phys_offset_to_gaddr(hwaddr phys_offset, ram_addr_t size,
                                        int page_mask)
 {
     hwaddr addr = phys_offset & page_mask;
-    XenPhysmap *physmap = NULL;
+    XenPhysmap *physmap;
 
     QLIST_FOREACH(physmap, &xen_physmap, list) {
         if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) {

hw/riscv/riscv-iommu.c

@@ -1678,7 +1678,7 @@ static void riscv_iommu_ats(RISCVIOMMUState *s,
     IOMMUAccessFlags perm,
     void (*trace_fn)(const char *id))
 {
-    RISCVIOMMUSpace *as = NULL;
+    RISCVIOMMUSpace *as;
     IOMMUNotifier *n;
     IOMMUTLBEvent event;
     uint32_t pid;

hw/vfio/cpr-legacy.c

@@ -212,7 +212,7 @@ void vfio_legacy_cpr_unregister_container(VFIOLegacyContainer *container)
 void vfio_cpr_giommu_remap(VFIOContainer *bcontainer,
                            MemoryRegionSection *section)
 {
-    VFIOGuestIOMMU *giommu = NULL;
+    VFIOGuestIOMMU *giommu;
     hwaddr as_offset = section->offset_within_address_space;
     hwaddr iommu_offset = as_offset - section->offset_within_region;
 

hw/vfio/listener.c

@@ -333,7 +333,7 @@ static void vfio_ram_discard_unregister_listener(VFIOContainer *bcontainer,
                                                  MemoryRegionSection *section)
 {
     RamDiscardManager *rdm = memory_region_get_ram_discard_manager(section->mr);
-    VFIORamDiscardListener *vrdl = NULL;
+    VFIORamDiscardListener *vrdl;
 
     QLIST_FOREACH(vrdl, &bcontainer->vrdl_list, next) {
         if (vrdl->mr == section->mr &&
@@ -463,7 +463,7 @@ static void vfio_device_error_append(VFIODevice *vbasedev, Error **errp)
 VFIORamDiscardListener *vfio_find_ram_discard_listener(
     VFIOContainer *bcontainer, MemoryRegionSection *section)
 {
-    VFIORamDiscardListener *vrdl = NULL;
+    VFIORamDiscardListener *vrdl;
 
     QLIST_FOREACH(vrdl, &bcontainer->vrdl_list, next) {
         if (vrdl->mr == section->mr &&

hw/xen/xen_pt_config_init.c

@@ -62,7 +62,7 @@ static int xen_pt_hide_dev_cap(const XenHostPCIDevice *d, uint8_t grp_id)
 /*   find emulate register group entry */
 XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address)
 {
-    XenPTRegGroup *entry = NULL;
+    XenPTRegGroup *entry;
 
     /* find register group entry */
     QLIST_FOREACH(entry, &s->reg_grps, entries) {
@@ -80,7 +80,7 @@ XenPTRegGroup *xen_pt_find_reg_grp(XenPCIPassthroughState *s, uint32_t address)
 /* find emulate register entry */
 XenPTReg *xen_pt_find_reg(XenPTRegGroup *reg_grp, uint32_t address)
 {
-    XenPTReg *reg_entry = NULL;
+    XenPTReg *reg_entry;
     XenPTRegInfo *reg = NULL;
     uint32_t real_offset = 0;