exec: remove ram_addr argument from qemu_ram_block_from_host

Of the two callers, one does not use it, and the other can compute
it itself based on the other output argument (offset) and the RAMBlock.
Reviewed-by: NMarc-André Lureau <marcandre.lureau@gmail.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

exec.c

@@ -1897,16 +1897,16 @@ static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr,
  * ram_addr_t.
  */
 RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
-                                   ram_addr_t *ram_addr,
                                    ram_addr_t *offset)
 {
     RAMBlock *block;
     uint8_t *host = ptr;
 
     if (xen_enabled()) {
+        ram_addr_t ram_addr;
         rcu_read_lock();
-        *ram_addr = xen_ram_addr_from_mapcache(ptr);
-        block = qemu_get_ram_block(*ram_addr);
+        ram_addr = xen_ram_addr_from_mapcache(ptr);
+        block = qemu_get_ram_block(ram_addr);
         if (block) {
             *offset = (host - block->host);
         }
@@ -1938,7 +1938,6 @@ found:
     if (round_offset) {
         *offset &= TARGET_PAGE_MASK;
     }
-    *ram_addr = block->offset + *offset;
     rcu_read_unlock();
     return block;
 }
@@ -1968,10 +1967,10 @@ RAMBlock *qemu_ram_block_by_name(const char *name)
 MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr)
 {
     RAMBlock *block;
-    ram_addr_t offset; /* Not used */
-
-    block = qemu_ram_block_from_host(ptr, false, ram_addr, &offset);
+    ram_addr_t offset;
 
+    block = qemu_ram_block_from_host(ptr, false, &offset);
+    *ram_addr = block->offset + offset;
     if (!block) {
         return NULL;
     }

include/exec/cpu-common.h

@@ -60,7 +60,7 @@ void qemu_ram_remap(ram_addr_t addr, ram_addr_t length);
 MemoryRegion *qemu_ram_addr_from_host(void *ptr, ram_addr_t *ram_addr);
 RAMBlock *qemu_ram_block_by_name(const char *name);
 RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset,
-                                   ram_addr_t *ram_addr, ram_addr_t *offset);
+                                   ram_addr_t *offset);
 void qemu_ram_set_idstr(RAMBlock *block, const char *name, DeviceState *dev);
 void qemu_ram_unset_idstr(RAMBlock *block);
 const char *qemu_ram_get_idstr(RAMBlock *rb);

migration/postcopy-ram.c

@@ -407,7 +407,6 @@ static void *postcopy_ram_fault_thread(void *opaque)
 
     while (true) {
         ram_addr_t rb_offset;
-        ram_addr_t in_raspace;
         struct pollfd pfd[2];
 
         /*
@@ -459,7 +458,7 @@ static void *postcopy_ram_fault_thread(void *opaque)
 
         rb = qemu_ram_block_from_host(
                  (void *)(uintptr_t)msg.arg.pagefault.address,
-                 true, &in_raspace, &rb_offset);
+                 true, &rb_offset);
         if (!rb) {
             error_report("postcopy_ram_fault_thread: Fault outside guest: %"
                          PRIx64, (uint64_t)msg.arg.pagefault.address);