fork: Add generic vmalloced stack support

[cascardo/linux.git] / include / linux / sched.h

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 62c68e5..20f9f47 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1923,6 +1923,9 @@ struct task_struct {
 #ifdef CONFIG_MMU
        struct task_struct *oom_reaper_list;
 #endif
+#ifdef CONFIG_VMAP_STACK
+       struct vm_struct *stack_vm_area;
+#endif
 /* CPU-specific state of this task */
        struct thread_struct thread;
 /*
@@ -1939,6 +1942,18 @@ extern int arch_task_struct_size __read_mostly;
 # define arch_task_struct_size (sizeof(struct task_struct))
 #endif
 
+#ifdef CONFIG_VMAP_STACK
+static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
+{
+       return t->stack_vm_area;
+}
+#else
+static inline struct vm_struct *task_stack_vm_area(const struct task_struct *t)
+{
+       return NULL;
+}
+#endif
+
 /* Future-safe accessor for struct task_struct's cpus_allowed. */
 #define tsk_cpus_allowed(tsk) (&(tsk)->cpus_allowed)