diff options
Diffstat (limited to 'nuttx/include/sys/types.h')
| -rw-r--r-- | nuttx/include/sys/types.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/nuttx/include/sys/types.h b/nuttx/include/sys/types.h index 2ae69d4a7..95feee72e 100644 --- a/nuttx/include/sys/types.h +++ b/nuttx/include/sys/types.h @@ -154,7 +154,9 @@ typedef uint16_t dev_t; typedef uint16_t ino_t; -/* pid_t is used for process IDs and process group IDs */ +/* pid_t is used for process IDs and process group IDs. It must be signed because + * negative PID values are used to represent invalid PIDs. + */ typedef int pid_t; |