Re: [Qemu-devel] [PATCH] hostmem: simplify ifdef-s in file_backend_memory_alloc()

[Wei Yang <richard.weiyang@gmail.com>]

On Wed, Feb 13, 2019 at 07:38:58AM -0500, Igor Mammedov wrote:
>cleanup file_backend_memory_alloc() by using one CONFIG_POSIX ifdef
>instead of several ones within the function to make it simpler to follow.
>
>Signed-off-by: Igor Mammedov <imammedo@redhat.com>
>Suggested-by: Wei Yang <richardw.yang@linux.intel.com>

Reviewed-by: Wei Yang <richardw.yang@linux.intel.com>

>---
>Cc: Haozhong Zhang <haozhong.zhang@intel.com>
>Cc: Zhang Yi <yi.z.zhang@linux.intel.com>
>Cc: Eduardo Habkost <ehabkost@redhat.com>
>Cc: Stefan Hajnoczi <stefanha@redhat.com>
>CC: Wei Yang <richardw.yang@linux.intel.com>
>---
> backends/hostmem-file.c | 9 ++++-----
> 1 file changed, 4 insertions(+), 5 deletions(-)
>
>diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c
>index ba601ce940..ce54788048 100644
>--- a/backends/hostmem-file.c
>+++ b/backends/hostmem-file.c
>@@ -41,10 +41,12 @@ struct HostMemoryBackendFile {
> static void
> file_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
> {
>+#ifndef CONFIG_POSIX
>+    error_setg(errp, "backend '%s' not supported on this host",
>+               object_get_typename(OBJECT(backend)));
>+#else
>     HostMemoryBackendFile *fb = MEMORY_BACKEND_FILE(backend);
>-#ifdef CONFIG_POSIX
>     gchar *name;
>-#endif
> 
>     if (!backend->size) {
>         error_setg(errp, "can't create backend with size 0");
>@@ -54,9 +56,6 @@ file_backend_memory_alloc(HostMemoryBackend *backend, Error **errp)
>         error_setg(errp, "mem-path property not set");
>         return;
>     }
>-#ifndef CONFIG_POSIX
>-    error_setg(errp, "-mem-path not supported on this host");
>-#else
>     backend->force_prealloc = mem_prealloc;
>     name = host_memory_backend_get_name(backend);
>     memory_region_init_ram_from_file(&backend->mr, OBJECT(backend),
>-- 
>2.18.1
>

-- 
Wei Yang
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