tracing/probe: Fix same probe event argument matching

[linux-2.6-microblaze.git] / kernel / stacktrace.c

diff --git a/kernel/stacktrace.c b/kernel/stacktrace.c
index e6a02b2..f5440ab 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->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