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-rw-r--r--arch/powerpc/include/asm/processor.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index bf117d8fb45f..28ded5d9b579 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -295,6 +295,15 @@ struct thread_struct {
#endif
#ifdef CONFIG_PPC64
unsigned long dscr;
+ /*
+ * This member element dscr_inherit indicates that the process
+ * has explicitly attempted and changed the DSCR register value
+ * for itself. Hence kernel wont use the default CPU DSCR value
+ * contained in the PACA structure anymore during process context
+ * switch. Once this variable is set, this behaviour will also be
+ * inherited to all the children of this process from that point
+ * onwards.
+ */
int dscr_inherit;
unsigned long ppr; /* used to save/restore SMT priority */
#endif