ACPI: restore comment justifying 'extra' P_LVLx access

[pandora-kernel.git] / include / asm-powerpc / lppaca.h

diff --git a/include/asm-powerpc/lppaca.h b/include/asm-powerpc/lppaca.h
index c1bedab..4dc514a 100644 (file)
--- a/include/asm-powerpc/lppaca.h
+++ b/include/asm-powerpc/lppaca.h
@@ -18,6 +18,7 @@
  */
 #ifndef _ASM_POWERPC_LPPACA_H
 #define _ASM_POWERPC_LPPACA_H
+#ifdef __KERNEL__
 
 //=============================================================================
 //
@@ -28,6 +29,8 @@
 //----------------------------------------------------------------------------
 #include <asm/types.h>
 
+/* The Hypervisor barfs if the lppaca crosses a page boundary.  A 1k
+ * alignment is sufficient to prevent this */
 struct lppaca {
 //=============================================================================
 // CACHE_LINE_1 0x0000 - 0x007F Contains read-only data
@@ -126,6 +129,9 @@ struct lppaca {
 // CACHE_LINE_4-5 0x0100 - 0x01FF Contains PMC interrupt data
 //=============================================================================
        u8      pmc_save_area[256];     // PMC interrupt Area           x00-xFF
-};
+} __attribute__((__aligned__(0x400)));
 
+extern struct lppaca lppaca[];
+
+#endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_LPPACA_H */