Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / include / linux / errno.h

diff --git a/include/linux/errno.h b/include/linux/errno.h
index d90b80f9b28c7c0402b71a8fa19b2cc8d9e5efd8..2d09bfa5c2628a3e1e396350b7d9d14f1a2791c8 100644 (file)
--- a/include/linux/errno.h
+++ b/include/linux/errno.h
@@ -5,12 +5,18 @@
 
 #ifdef __KERNEL__
 
-/* Should never be seen by user programs */
+/*
+ * These should never be seen by user programs.  To return one of ERESTART*
+ * codes, signal_pending() MUST be set.  Note that ptrace can observe these
+ * at syscall exit tracing, but they will never be left for the debugged user
+ * process to see.
+ */
 #define ERESTARTSYS    512
 #define ERESTARTNOINTR 513
 #define ERESTARTNOHAND 514     /* restart if no handler.. */
 #define ENOIOCTLCMD    515     /* No ioctl command */
 #define ERESTART_RESTARTBLOCK 516 /* restart by calling sys_restart_syscall */
+#define EPROBE_DEFER   517     /* Driver requests probe retry */
 
 /* Defined for the NFSv3 protocol */
 #define EBADHANDLE     521     /* Illegal NFS file handle */