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-rw-r--r--arch/arm/kernel/entry-armv.S7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index f248bbfe745..964cd717506 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -709,7 +709,12 @@ __kuser_memory_barrier: @ 0xffff0fa0
* The C flag is also set if *ptr was changed to allow for assembly
* optimization in the calling code.
*
- * Note: this routine already includes memory barriers as needed.
+ * Notes:
+ *
+ * - This routine already includes memory barriers as needed.
+ *
+ * - A failure might be transient, i.e. it is possible, although unlikely,
+ * that "failure" be returned even if *ptr == oldval.
*
* For example, a user space atomic_add implementation could look like this:
*