[Qemu-devel] [PATCH v4 10/33] hostmem-file: clean up memory allocation

[Xiao Guangrong <guangrong.xiao@linux.intel.com>]

- hostmem-file.c is compiled only if CONFIG_LINUX is enabled so that is
  unnecessary to do the same check in the source file

- the interface, HostMemoryBackendClass->alloc(), is not called many
  times, do not need to check if the memory-region is initialized

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
---
 backends/hostmem-file.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c
index e9b6d21..9097a57 100644
--- a/backends/hostmem-file.c
+++ b/backends/hostmem-file.c
@@ -46,17 +46,12 @@ file_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
         error_setg(errp, "mem-path property not set");
         return;
     }
-#ifndef CONFIG_LINUX
-    error_setg(errp, "-mem-path not supported on this host");
-#else
-    if (!memory_region_size(&backend->mr)) {
-        backend->force_prealloc = mem_prealloc;
-        memory_region_init_ram_from_file(&backend->mr, OBJECT(backend),
+
+    backend->force_prealloc = mem_prealloc;
+    memory_region_init_ram_from_file(&backend->mr, OBJECT(backend),
                                  object_get_canonical_path(OBJECT(backend)),
                                  backend->size, fb->share,
                                  fb->mem_path, errp);
-    }
-#endif
 }
 
 static void
-- 
1.8.3.1