test printf: Add very basic struct resource tests

The printf tests for struct resource were stubbed out.  struct range
printing will leverage the struct resource implementation.

To prevent regression add some basic sanity tests for struct resource.

Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Jonathan Cameron <[email protected]>
Reviewed-by: Fan Ni <[email protected]>
Tested-by: Fan Ni <[email protected]>
Acked-by: Petr Mladek <[email protected]>
Link: https://patch.msgid.link/[email protected]
Tested-by: Petr Mladek <[email protected]>
Signed-off-by: Ira Weiny <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Dave Jiang <[email protected]>

Author: weiny2

lib/test_printf.c

@@ -386,6 +386,50 @@ kernel_ptr(void)
 static void __init
 struct_resource(void)
 {
+	struct resource test_resource = {
+		.start = 0xc0ffee00,
+		.end = 0xc0ffee00,
+		.flags = IORESOURCE_MEM,
+	};
+
+	test("[mem 0xc0ffee00 flags 0x200]",
+	     "%pr", &test_resource);
+
+	test_resource = (struct resource) {
+		.start = 0xc0ffee,
+		.end = 0xba5eba11,
+		.flags = IORESOURCE_MEM,
+	};
+	test("[mem 0x00c0ffee-0xba5eba11 flags 0x200]",
+	     "%pr", &test_resource);
+
+	test_resource = (struct resource) {
+		.start = 0xba5eba11,
+		.end = 0xc0ffee,
+		.flags = IORESOURCE_MEM,
+	};
+	test("[mem 0xba5eba11-0x00c0ffee flags 0x200]",
+	     "%pr", &test_resource);
+
+	test_resource = (struct resource) {
+		.start = 0xba5eba11,
+		.end = 0xba5eca11,
+		.flags = IORESOURCE_MEM,
+	};
+
+	test("[mem 0xba5eba11-0xba5eca11 flags 0x200]",
+	     "%pr", &test_resource);
+
+	test_resource = (struct resource) {
+		.start = 0xba11,
+		.end = 0xca10,
+		.flags = IORESOURCE_IO |
+			 IORESOURCE_DISABLED |
+			 IORESOURCE_UNSET,
+	};
+
+	test("[io  size 0x1000 disabled]",
+	     "%pR", &test_resource);
 }
 
 static void __init