[PATCH 3/5] x86: Add usage() to print out usage message

[Fouad Hilly <fouad.hilly@xxxxxxxxx>]

Refactor xen-ucode tool by adding usage() to handle usage\help messages

Signed-off-by: Fouad Hilly <fouad.hilly@xxxxxxxxx>
---
 tools/misc/xen-ucode.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/misc/xen-ucode.c b/tools/misc/xen-ucode.c
index c6ae6498d659..1edcebfb9f9c 100644
--- a/tools/misc/xen-ucode.c
+++ b/tools/misc/xen-ucode.c
@@ -17,6 +17,14 @@ static xc_interface *xch;
 static const char intel_id[] = "GenuineIntel";
 static const char   amd_id[] = "AuthenticAMD";
 
+static void usage(const char *name)
+{
+    printf("%s: Xen microcode updating tool\n"
+            "Usage: %s [<microcode file> | show-cpu-info]\n"
+            "\n"
+            , name, name);
+}
+
 static void show_curr_cpu(FILE *f)
 {
     int ret;
@@ -88,9 +96,7 @@ int main(int argc, char *argv[])
 
     if ( argc < 2 )
     {
-        fprintf(stderr,
-                "xen-ucode: Xen microcode updating tool\n"
-                "Usage: %s [<microcode file> | show-cpu-info]\n", argv[0]);
+        usage(argv[0]);
         show_curr_cpu(stderr);
         exit(2);
     }
-- 
2.42.0