exec: Fix prototype of phys_mem_set_alloc and related functions

phys_mem_alloc and its assigned values qemu_anon_ram_alloc and
legacy_s390_alloc must have identical argument lists.

legacy_s390_alloc uses the size parameter to call mmap, so size_t is
good enough for all of them.

This patch fixes compiler errors on i686 Linux hosts:

  CC    alpha-softmmu/exec.o
exec.c:752:51: error:
 initialization from incompatible pointer type [-Werror]
exec.c: In function 'qemu_ram_alloc_from_ptr':
exec.c:1139:32: error:
 comparison of distinct pointer types lacks a cast [-Werror]
exec.c: In function 'qemu_ram_remap':
exec.c:1283:21: error:
 comparison of distinct pointer types lacks a cast [-Werror]

Signed-off-by: Stefan Weil <[email protected]>
Reviewed-by: Markus Armbruster <[email protected]>
Message-id: [email protected]
Signed-off-by: Anthony Liguori <[email protected]>

exec.c

@@ -717,14 +717,14 @@ static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end,
                              uint16_t section);
 static subpage_t *subpage_init(AddressSpace *as, hwaddr base);
 
-static void *(*phys_mem_alloc)(ram_addr_t size) = qemu_anon_ram_alloc;
+static void *(*phys_mem_alloc)(size_t size) = qemu_anon_ram_alloc;
 
 /*
  * Set a custom physical guest memory alloator.
  * Accelerators with unusual needs may need this.  Hopefully, we can
  * get rid of it eventually.
  */
-void phys_mem_set_alloc(void *(*alloc)(ram_addr_t))
+void phys_mem_set_alloc(void *(*alloc)(size_t))
 {
     phys_mem_alloc = alloc;
 }

include/exec/exec-all.h

@@ -322,7 +322,7 @@ extern uintptr_t tci_tb_ptr;
 
 #if !defined(CONFIG_USER_ONLY)
 
-void phys_mem_set_alloc(void *(*alloc)(ram_addr_t));
+void phys_mem_set_alloc(void *(*alloc)(size_t));
 
 struct MemoryRegion *iotlb_to_region(hwaddr index);
 bool io_mem_read(struct MemoryRegion *mr, hwaddr addr,

target-s390x/kvm.c

@@ -93,7 +93,7 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
 
 static int cap_sync_regs;
 
-static void *legacy_s390_alloc(ram_addr_t size);
+static void *legacy_s390_alloc(size_t size);
 
 int kvm_arch_init(KVMState *s)
 {
@@ -325,7 +325,7 @@ int kvm_s390_get_registers_partial(CPUState *cs)
  * to grow. We also have to use MAP parameters that avoid
  * read-only mapping of guest pages.
  */
-static void *legacy_s390_alloc(ram_addr_t size)
+static void *legacy_s390_alloc(size_t size)
 {
     void *mem;