1 files changed, 2 insertions, 1 deletions

diff --git a/include/asm-ppc/thread_info.h b/include/asm-ppc/thread_info.h
index e3b5284a6f9..27903db42ef 100644
--- a/include/asm-ppc/thread_info.h
+++ b/include/asm-ppc/thread_info.h
@@ -20,7 +20,8 @@ struct thread_info {
         unsigned long           flags;          /* low level flags */
         unsigned long           local_flags;    /* non-racy flags */
         int                     cpu;            /* cpu we're on */
-        int                     preempt_count;
+        int                     preempt_count;  /* 0 => preemptable,
+                                                   <0 => BUG */
         struct restart_block    restart_block;
 };