diff options
Diffstat (limited to 'include/linux/errno.h')
| -rw-r--r-- | include/linux/errno.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/errno.h b/include/linux/errno.h index d90b80f9b28c..46685832ed99 100644 --- a/include/linux/errno.h +++ b/include/linux/errno.h @@ -5,7 +5,12 @@ #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.. */ |