Messages in this thread Patch in this message | | | From | "Naveen N. Rao" <> | Subject | [PATCH 1/3] ftrace: Look up the address of return_to_handler() using helpers | Date | Thu, 5 Sep 2019 23:50:28 +0530 |
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This ensures that we use the right address on architectures that use function descriptors.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> --- kernel/trace/fgraph.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/trace/fgraph.c b/kernel/trace/fgraph.c index 8dfd5021b933..7950a0356042 100644 --- a/kernel/trace/fgraph.c +++ b/kernel/trace/fgraph.c @@ -276,7 +276,7 @@ unsigned long ftrace_graph_ret_addr(struct task_struct *task, int *idx, int index = task->curr_ret_stack; int i; - if (ret != (unsigned long)return_to_handler) + if (ret != (unsigned long)dereference_kernel_function_descriptor(return_to_handler)) return ret; if (index < 0) @@ -294,7 +294,7 @@ unsigned long ftrace_graph_ret_addr(struct task_struct *task, int *idx, { int task_idx; - if (ret != (unsigned long)return_to_handler) + if (ret != (unsigned long)dereference_kernel_function_descriptor(return_to_handler)) return ret; task_idx = task->curr_ret_stack; -- 2.23.0
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