memory: Have memory_region_init_ram_nomigrate() handler return a boolean

Following the example documented since commit e3fe398 ("error:
Document Error API usage rules"), have memory_region_init_ram_nomigrate
return a boolean indicating whether an error is set or not.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Message-Id: <20231120213301.24349-3-philmd@linaro.org>

include/exec/memory.h

@@ -1288,8 +1288,10 @@ void memory_region_init_io(MemoryRegion *mr,
  *
  * Note that this function does not do anything to cause the data in the
  * RAM memory region to be migrated; that is the responsibility of the caller.
+ *
+ * Return: true on success, else false setting @errp with error.
  */
-void memory_region_init_ram_nomigrate(MemoryRegion *mr,
+bool memory_region_init_ram_nomigrate(MemoryRegion *mr,
                                       Object *owner,
                                       const char *name,
                                       uint64_t size,

system/memory.c

@@ -1546,13 +1546,14 @@ void memory_region_init_io(MemoryRegion *mr,
     mr->terminates = true;
 }
 
-void memory_region_init_ram_nomigrate(MemoryRegion *mr,
+bool memory_region_init_ram_nomigrate(MemoryRegion *mr,
                                       Object *owner,
                                       const char *name,
                                       uint64_t size,
                                       Error **errp)
 {
-    memory_region_init_ram_flags_nomigrate(mr, owner, name, size, 0, errp);
+    return memory_region_init_ram_flags_nomigrate(mr, owner, name,
+                                                  size, 0, errp);
 }
 
 bool memory_region_init_ram_flags_nomigrate(MemoryRegion *mr,