migration: move ram stuff to migration/ram

For historic reasons, ram migration have been on arch_init.c.  Just
split it into migration/ram.c, the same that happened with block.c.

There is only code movement, no changes altogether.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>

MAINTAINERS

@@ -1015,7 +1015,6 @@ S: Maintained
 F: include/migration/
 F: migration/
 F: savevm.c
-F: arch_init.c
 F: scripts/vmstate-static-checker.py
 F: tests/vmstate-static-checker-data/
 

Makefile.target

@@ -135,6 +135,7 @@ obj-$(CONFIG_KVM) += kvm-all.o
 obj-y += memory.o savevm.o cputlb.o
 obj-y += memory_mapping.o
 obj-y += dump.o
+obj-y += migration/ram.o
 LIBS := $(libs_softmmu) $(LIBS)
 
 # xen support

include/migration/migration.h

@@ -180,4 +180,6 @@ size_t ram_control_save_page(QEMUFile *f, ram_addr_t block_offset,
                              ram_addr_t offset, size_t size,
                              uint64_t *bytes_sent);
 
+
+void ram_mig_init(void);
 #endif

include/sysemu/arch_init.h

@@ -30,7 +30,6 @@ extern const uint32_t arch_type;
 void select_soundhw(const char *optarg);
 void do_acpitable_option(const QemuOpts *opts);
 void do_smbios_option(QemuOpts *opts);
-void ram_mig_init(void);
 void cpudef_init(void);
 void audio_init(void);
 int kvm_available(void);

trace-events

@@ -1205,7 +1205,7 @@ vmstate_subsection_load_good(const char *parent) "%s"
 # qemu-file.c
 qemu_file_fclose(void) ""
 
-# arch_init.c
+# migration/ram.c
 migration_bitmap_sync_start(void) ""
 migration_bitmap_sync_end(uint64_t dirty_pages) "dirty_pages %" PRIu64""
 migration_throttle(void) ""