introduce size_param()

With there being several instances of custom_param() where the handler
is just invoking parse_size_and_unit(), it seems to make sense to
introduce a simplifying abstraction.

Also fix serial_txbufsz not having been guaranteed to be a power of
two.

Signed-off-by: Jan Beulich <jbeulich@novell.com>

1 files changed, 12 insertions, 1 deletions

diff --git a/xen/include/xen/init.h b/xen/include/xen/init.h
index 7e79e52fe3..4f9019afe0 100644
--- a/xen/include/xen/init.h
+++ b/xen/include/xen/init.h
@@ -78,7 +78,14 @@ extern initcall_t __initcall_start, __initcall_end;
  */
 struct kernel_param {
     const char *name;
-    enum { OPT_STR, OPT_UINT, OPT_BOOL, OPT_INVBOOL, OPT_CUSTOM } type;
+    enum {
+        OPT_STR,
+        OPT_UINT,
+        OPT_BOOL,
+        OPT_INVBOOL,
+        OPT_SIZE,
+        OPT_CUSTOM
+    } type;
     void *var;
     unsigned int len;
 };
@@ -101,6 +108,10 @@ extern struct kernel_param __setup_start, __setup_end;
     static char __setup_str_##_var[] __initdata = _name; \
     static struct kernel_param __setup_##_var __attribute_used__ \
         __initsetup = { __setup_str_##_var, OPT_UINT, &_var, sizeof(_var) }
+#define size_param(_name, _var) \
+    static char __setup_str_##_var[] __initdata = _name; \
+    static struct kernel_param __setup_##_var __attribute_used__ \
+        __initsetup = { __setup_str_##_var, OPT_SIZE, &_var, sizeof(_var) }
 #define string_param(_name, _var) \
     static char __setup_str_##_var[] __initdata = _name; \
     static struct kernel_param __setup_##_var __attribute_used__ \