[Xen-devel] [PATCH 01/24] xen/mm: Don't use _{g, m}fn for defining INVALID_{G, M}FN

[Julien Grall <julien.grall@xxxxxxx>]

INVALID_{G,M}FN are defined using static inline helpers _{g,m}fn.
This means, they cannot be used to initialize a build time static variable:

In file included from mm.c:24:0:
xen/xen/include/xen/mm.h:59:26: error: initializer element is not constant
 #define INVALID_MFN      _mfn(~0UL)

Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
---
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>
Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Cc: Jan Beulich <jbeulich@xxxxxxxx>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Cc: Tim Deegan <tim@xxxxxxx>
Cc: Wei Liu <wei.liu2@xxxxxxxxxx>

I know that this solution will not work for non-debug build. I would
like input from the community on way to fix it nicely.
---
 xen/include/xen/mm.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h
index ee50d4cd7b..f0daae6b5c 100644
--- a/xen/include/xen/mm.h
+++ b/xen/include/xen/mm.h
@@ -56,7 +56,7 @@
 
 TYPE_SAFE(unsigned long, mfn);
 #define PRI_mfn          "05lx"
-#define INVALID_MFN      _mfn(~0UL)
+#define INVALID_MFN      (mfn_t){ ~0UL }
 
 #ifndef mfn_t
 #define mfn_t /* Grep fodder: mfn_t, _mfn() and mfn_x() are defined above */
@@ -85,7 +85,7 @@ static inline bool_t mfn_eq(mfn_t x, mfn_t y)
 
 TYPE_SAFE(unsigned long, gfn);
 #define PRI_gfn          "05lx"
-#define INVALID_GFN      _gfn(~0UL)
+#define INVALID_GFN      (gfn_t){ ~0UL }
 
 #ifndef gfn_t
 #define gfn_t /* Grep fodder: gfn_t, _gfn() and gfn_x() are defined above */
-- 
2.11.0


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