Fixup read_mostly section on internode cache line size for vSMP

From: Ravikiran G Thirumalai <kiran@scalex86.org>
Fixup the read mostly section to start at internode cacheline boundary.

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Shai Fultheim <shai@scalex86.org>
Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/x86_64/Kconfig              |    5 +++++
 arch/x86_64/kernel/vmlinux.lds.S |    2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)

Index: linux/arch/x86_64/Kconfig
===================================================================
--- linux.orig/arch/x86_64/Kconfig
+++ linux/arch/x86_64/Kconfig
@@ -136,6 +136,11 @@ config X86_L1_CACHE_SHIFT
 	default "7" if GENERIC_CPU || MPSC
 	default "6" if MK8
 
+config X86_INTERNODE_CACHE_BYTES
+	int
+	default "4096" if X86_VSMP
+	default X86_L1_CACHE_BYTES if !X86_VSMP
+
 config X86_TSC
 	bool
 	default y
Index: linux/arch/x86_64/kernel/vmlinux.lds.S
===================================================================
--- linux.orig/arch/x86_64/kernel/vmlinux.lds.S
+++ linux/arch/x86_64/kernel/vmlinux.lds.S
@@ -65,7 +65,7 @@ SECTIONS
   .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) {
 	*(.data.cacheline_aligned)
   }
-  . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
+  . = ALIGN(CONFIG_X86_INTERNODE_CACHE_BYTES);
   .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET) {
   	*(.data.read_mostly)
   }