gpio: Pass mask and size with the init_valid_mask()

[linux.git] / kernel / stacktrace.c

diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c
index 36139de0a3c4bcb7ba7da936a8d43fba08aa5929..f5440abb753291df445a1ce17559fd476d810a15 100644 (file)
--- a/kernel/stacktrace.c
+++ b/kernel/stacktrace.c
@@ -226,12 +226,17 @@ unsigned int stack_trace_save_user(unsigned long *store, unsigned int size)
                .store  = store,
                .size   = size,
        };
+       mm_segment_t fs;
 
        /* Trace user stack if not a kernel thread */
-       if (!current->mm)
+       if (current->flags & PF_KTHREAD)
                return 0;
 
+       fs = get_fs();
+       set_fs(USER_DS);
        arch_stack_walk_user(consume_entry, &c, task_pt_regs(current));
+       set_fs(fs);
+
        return c.len;
 }
 #endif
@@ -255,14 +260,6 @@ save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
        WARN_ONCE(1, KERN_INFO "save_stack_trace_regs() not implemented yet.\n");
 }
 
-__weak int
-save_stack_trace_tsk_reliable(struct task_struct *tsk,
-                             struct stack_trace *trace)
-{
-       WARN_ONCE(1, KERN_INFO "save_stack_tsk_reliable() not implemented yet.\n");
-       return -ENOSYS;
-}
-
 /**
  * stack_trace_save - Save a stack trace into a storage array
  * @store:     Pointer to storage array