From: Torsten Duwe Date: Thu, 3 Mar 2016 04:26:57 +0000 (+1100) Subject: powerpc/ftrace: Use generic ftrace_modify_all_code() X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=c96f83856f56a66a5d7fd730958bec80c9b5a020;p=openwrt%2Fstaging%2Fblogic.git powerpc/ftrace: Use generic ftrace_modify_all_code() Convert powerpc's arch_ftrace_update_code() from its own version to use the generic default functionality (without stop_machine -- our instructions are properly aligned and the replacements atomic). With this we gain error checking and the much-needed function_trace_op handling. Reviewed-by: Balbir Singh Reviewed-by: Kamalesh Babulal Signed-off-by: Torsten Duwe Signed-off-by: Michael Ellerman --- diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index 4505cbfd0e13..62899fbae703 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -449,20 +449,13 @@ void ftrace_replace_code(int enable) } } +/* + * Use the default ftrace_modify_all_code, but without + * stop_machine(). + */ void arch_ftrace_update_code(int command) { - if (command & FTRACE_UPDATE_CALLS) - ftrace_replace_code(1); - else if (command & FTRACE_DISABLE_CALLS) - ftrace_replace_code(0); - - if (command & FTRACE_UPDATE_TRACE_FUNC) - ftrace_update_ftrace_func(ftrace_trace_function); - - if (command & FTRACE_START_FUNC_RET) - ftrace_enable_ftrace_graph_caller(); - else if (command & FTRACE_STOP_FUNC_RET) - ftrace_disable_ftrace_graph_caller(); + ftrace_modify_all_code(command); } int __init ftrace_dyn_arch_init(void)