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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-27 10:34:19 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-09-27 10:34:19 -0300 |
commit | 1c29f4306f557ef5d9ed515ec8881f4d1735b058 (patch) | |
tree | 1359b9f8403af67e35bbbaae36e2b60c9bb3d2da /kernel/fork.c | |
parent | 5b465b045af3a649a89b8a5c5bfdece20ffc0345 (diff) |
Linux-libre 4.7.5-gnupck-4.7.5-gnu
Diffstat (limited to 'kernel/fork.c')
-rw-r--r-- | kernel/fork.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 767d95257..d7485f782 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -801,6 +801,29 @@ struct file *get_mm_exe_file(struct mm_struct *mm) EXPORT_SYMBOL(get_mm_exe_file); /** + * get_task_exe_file - acquire a reference to the task's executable file + * + * Returns %NULL if task's mm (if any) has no associated executable file or + * this is a kernel thread with borrowed mm (see the comment above get_task_mm). + * User must release file via fput(). + */ +struct file *get_task_exe_file(struct task_struct *task) +{ + struct file *exe_file = NULL; + struct mm_struct *mm; + + task_lock(task); + mm = task->mm; + if (mm) { + if (!(task->flags & PF_KTHREAD)) + exe_file = get_mm_exe_file(mm); + } + task_unlock(task); + return exe_file; +} +EXPORT_SYMBOL(get_task_exe_file); + +/** * get_task_mm - acquire a reference to the task's mm * * Returns %NULL if the task has no mm. Checks PF_KTHREAD (meaning |