diff options
Diffstat (limited to 'fs/open.c')
| -rw-r--r-- | fs/open.c | 4 |
1 files changed, 4 insertions, 0 deletions
| @@ -890,6 +890,10 @@ EXPORT_SYMBOL(filp_open); | |||
| 890 | * a fully instantiated struct file to the caller. | 890 | * a fully instantiated struct file to the caller. |
| 891 | * This function is meant to be called from within a filesystem's | 891 | * This function is meant to be called from within a filesystem's |
| 892 | * lookup method. | 892 | * lookup method. |
| 893 | * Beware of calling it for non-regular files! Those ->open methods might block | ||
| 894 | * (e.g. in fifo_open), leaving you with parent locked (and in case of fifo, | ||
| 895 | * leading to a deadlock, as nobody can open that fifo anymore, because | ||
| 896 | * another process to open fifo will block on locked parent when doing lookup). | ||
| 893 | * Note that in case of error, nd->intent.open.file is destroyed, but the | 897 | * Note that in case of error, nd->intent.open.file is destroyed, but the |
| 894 | * path information remains valid. | 898 | * path information remains valid. |
| 895 | * If the open callback is set to NULL, then the standard f_op->open() | 899 | * If the open callback is set to NULL, then the standard f_op->open() |