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authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2019-09-05 21:20:28 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2019-09-18 05:24:47 +0300
commita3db31ff6ce31f5a544a66b61613a098029031cc (patch)
tree79e0f34cdac6861674298bfe2b6f5cf8a7ecd4ce /kernel/trace/fgraph.c
parente7ca44ed3ba77fc26cf32650bb71584896662474 (diff)
downloadlinux-a3db31ff6ce31f5a544a66b61613a098029031cc.tar.xz
ftrace: Look up the address of return_to_handler() using helpers
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> Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/8f6f14d192a994008ac370ce14036bbe67224c7d.1567707399.git.naveen.n.rao@linux.vnet.ibm.com
Diffstat (limited to 'kernel/trace/fgraph.c')
-rw-r--r--kernel/trace/fgraph.c4
1 files 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;