memory: get rid of memory_region_init_reservation

The function has been deprecated for 2.5 years, and there are just a handful
of users.  Convert them to memory_region_init_io with NULL callbacks,
and while at it pass the right device as the owner.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

docs/devel/memory.txt

@@ -77,9 +77,8 @@ MemoryRegion):
 - reservation region: a reservation region is primarily for debugging.
   It claims I/O space that is not supposed to be handled by QEMU itself.
   The typical use is to track parts of the address space which will be
-  handled by the host kernel when KVM is enabled.
-  You initialize these with memory_region_init_reservation(), or by
-  passing a NULL callback parameter to memory_region_init_io().
+  handled by the host kernel when KVM is enabled.  You initialize these
+  by passing a NULL callback parameter to memory_region_init_io().
 
 It is valid to add subregions to a region which is not a pure container
 (that is, to an MMIO, RAM or ROM region). This means that the region

hw/i386/kvm/i8254.c

@@ -293,7 +293,7 @@ static void kvm_pit_realizefn(DeviceState *dev, Error **errp)
         return;
     }
 
-    memory_region_init_reservation(&pit->ioports, NULL, "kvm-pit", 4);
+    memory_region_init_io(&pit->ioports, OBJECT(dev), NULL, NULL, "kvm-pit", 4);
 
     qdev_init_gpio_in(dev, kvm_pit_irq_control, 1);
 

hw/i386/kvm/i8259.c

@@ -121,8 +121,8 @@ static void kvm_pic_realize(DeviceState *dev, Error **errp)
     PICCommonState *s = PIC_COMMON(dev);
     KVMPICClass *kpc = KVM_PIC_GET_CLASS(dev);
 
-    memory_region_init_reservation(&s->base_io, NULL, "kvm-pic", 2);
-    memory_region_init_reservation(&s->elcr_io, NULL, "kvm-elcr", 1);
+    memory_region_init_io(&s->base_io, OBJECT(dev), NULL, NULL, "kvm-pic", 2);
+    memory_region_init_io(&s->elcr_io, OBJECT(dev), NULL, NULL, "kvm-elcr", 1);
 
     kpc->parent_realize(dev, errp);
 }

hw/i386/kvm/ioapic.c

@@ -142,7 +142,7 @@ static void kvm_ioapic_realize(DeviceState *dev, Error **errp)
 {
     IOAPICCommonState *s = IOAPIC_COMMON(dev);
 
-    memory_region_init_reservation(&s->io_memory, NULL, "kvm-ioapic", 0x1000);
+    memory_region_init_io(&s->io_memory, OBJECT(dev), NULL, NULL, "kvm-ioapic", 0x1000);
     /*
      * KVM ioapic only supports 0x11 now. This will only be used when
      * we want to dump ioapic version.

include/exec/memory.h

@@ -675,29 +675,6 @@ void memory_region_init_rom_device_nomigrate(MemoryRegion *mr,
                                              uint64_t size,
                                              Error **errp);
 
-/**
- * memory_region_init_reservation: Initialize a memory region that reserves
- *                                 I/O space.
- *
- * A reservation region primarily serves debugging purposes.  It claims I/O
- * space that is not supposed to be handled by QEMU itself.  Any access via
- * the memory API will cause an abort().
- * This function is deprecated. Use memory_region_init_io() with NULL
- * callbacks instead.
- *
- * @mr: the #MemoryRegion to be initialized
- * @owner: the object that tracks the region's reference count
- * @name: used for debugging; not visible to the user or ABI
- * @size: size of the region.
- */
-static inline void memory_region_init_reservation(MemoryRegion *mr,
-                                    Object *owner,
-                                    const char *name,
-                                    uint64_t size)
-{
-    memory_region_init_io(mr, owner, NULL, mr, name, size);
-}
-
 /**
  * memory_region_init_iommu: Initialize a memory region of a custom type
  * that translates addresses