[PATCH 02/21] X86_64, UV: Add UV Architecture Defines

[Mike Travis]

Add defines to control which UV architectures are supported, and modify the
'if (is_uvX_*)' functions to return constant 0 for those not supported.
This will help optimize code paths when support for specific UV arches
is removed.

Signed-off-by: Mike Travis <tra...@sgi.com>
Reviewed-by: Dimitri Sivanich <sivan...@sgi.com>
Tested-by: John Estabrook <estabr...@sgi.com>
Tested-by: Gary Kroening <g...@sgi.com>
---
 arch/x86/include/asm/uv/uv_hub.h |   36 +++++++++++++++++++++++++++++++-----
 1 file changed, 31 insertions(+), 5 deletions(-)

--- linux.orig/arch/x86/include/asm/uv/uv_hub.h
+++ linux/arch/x86/include/asm/uv/uv_hub.h
@@ -178,22 +178,43 @@ DECLARE_PER_CPU(struct uv_hub_info_s, __
 #define UV3_HUB_REVISION_BASE          5
 #define UV4_HUB_REVISION_BASE          7
 
+#ifdef UV1_HUB_IS_SUPPORTED
 static inline int is_uv1_hub(void)
 {
        return uv_hub_info->hub_revision < UV2_HUB_REVISION_BASE;
 }
+#else
+static inline int is_uv1_hub(void)
+{
+       return 0;
+}
+#endif
 
+#ifdef UV2_HUB_IS_SUPPORTED
 static inline int is_uv2_hub(void)
 {
        return ((uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE) &&
                (uv_hub_info->hub_revision < UV3_HUB_REVISION_BASE));
 }
+#else
+static inline int is_uv2_hub(void)
+{
+       return 0;
+}
+#endif
 
+#ifdef UV3_HUB_IS_SUPPORTED
 static inline int is_uv3_hub(void)
 {
        return ((uv_hub_info->hub_revision >= UV3_HUB_REVISION_BASE) &&
                (uv_hub_info->hub_revision < UV4_HUB_REVISION_BASE));
 }
+#else
+static inline int is_uv3_hub(void)
+{
+       return 0;
+}
+#endif
 
 #ifdef UV4_HUB_IS_SUPPORTED
 static inline int is_uv4_hub(void)
@@ -207,15 +228,20 @@ static inline int is_uv4_hub(void)
 }
 #endif
 
-static inline int is_uv_hub(void)
+static inline int is_uvx_hub(void)
 {
-       return uv_hub_info->hub_revision;
+       if (uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE)
+               return uv_hub_info->hub_revision;
+
+       return 0;
 }
 
-/* code common to uv2/3/4 only */
-static inline int is_uvx_hub(void)
+static inline int is_uv_hub(void)
 {
-       return uv_hub_info->hub_revision >= UV2_HUB_REVISION_BASE;
+#ifdef UV1_HUB_IS_SUPPORTED
+       return uv_hub_info->hub_revision;
+#endif
+       return is_uvx_hub();
 }
 
 union uvh_apicid {

--