1 files changed, 8 insertions, 3 deletions

diff --git a/include/asm-arm/ptrace.h b/include/asm-arm/ptrace.h
index 4377e22b7e1a..77adb7fa169b 100644
--- a/include/asm-arm/ptrace.h
+++ b/include/asm-arm/ptrace.h
@@ -23,6 +23,9 @@
 #define PTRACE_OLDSETOPTIONS    21
 
 #define PTRACE_GET_THREAD_AREA  22
+
+#define PTRACE_SET_SYSCALL      23
+
 /*
  * PSR bits
  */
@@ -60,9 +63,11 @@
 
 #ifndef __ASSEMBLY__
 
-/* this struct defines the way the registers are stored on the
-   stack during a system call. */
-
+/*
+ * This struct defines the way the registers are stored on the
+ * stack during a system call.  Note that sizeof(struct pt_regs)
+ * has to be a multiple of 8.
+ */
 struct pt_regs {
         long uregs[18];
 };