x86: Introduce GDT_ENTRY_INIT()

GDT_ENTRY_INIT is static initializer of desc_struct.

We already have similar macro GDT_ENTRY() but it's static
initializer for u64 and it cannot be used for desc_struct.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
LKML-Reference: <20090718151219.GD11294@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86/include/asm/desc_defs.h b/arch/x86/include/asm/desc_defs.h
index a6adefa28b94..9d6684849fd9 100644
--- a/arch/x86/include/asm/desc_defs.h
+++ b/arch/x86/include/asm/desc_defs.h
@@ -34,6 +34,12 @@ struct desc_struct {
         };
 } __attribute__((packed));
 
+#define GDT_ENTRY_INIT(flags, base, limit) { { { \
+                .a = ((limit) & 0xffff) | (((base) & 0xffff) << 16), \
+                .b = (((base) & 0xff0000) >> 16) | (((flags) & 0xf0ff) << 8) | \
+                        ((limit) & 0xf0000) | ((base) & 0xff000000), \
+        } } }
+
 enum {
         GATE_INTERRUPT = 0xE,
         GATE_TRAP = 0xF,