4.11-stable review patch. If anyone has any objections, please let me know.
------------------ From: Marcin Nowakowski <[email protected]> commit c0d80ddab89916273cb97114889d3f337bc370ae upstream. core_kernel_text is used by MIPS in its function graph trace processing, so having this method traced leads to an infinite set of recursive calls such as: Call Trace: ftrace_return_to_handler+0x50/0x128 core_kernel_text+0x10/0x1b8 prepare_ftrace_return+0x6c/0x114 ftrace_graph_caller+0x20/0x44 return_to_handler+0x10/0x30 return_to_handler+0x0/0x30 return_to_handler+0x0/0x30 ftrace_ops_no_ops+0x114/0x1bc core_kernel_text+0x10/0x1b8 core_kernel_text+0x10/0x1b8 core_kernel_text+0x10/0x1b8 ftrace_ops_no_ops+0x114/0x1bc core_kernel_text+0x10/0x1b8 prepare_ftrace_return+0x6c/0x114 ftrace_graph_caller+0x20/0x44 (...) Mark the function notrace to avoid it being traced. Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Marcin Nowakowski <[email protected]> Reviewed-by: Masami Hiramatsu <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Meyer <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Daniel Borkmann <[email protected]> Cc: Paul Gortmaker <[email protected]> Cc: Thomas Gleixner <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- kernel/extable.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/extable.c +++ b/kernel/extable.c @@ -69,7 +69,7 @@ static inline int init_kernel_text(unsig return 0; } -int core_kernel_text(unsigned long addr) +int notrace core_kernel_text(unsigned long addr) { if (addr >= (unsigned long)_stext && addr < (unsigned long)_etext)
