Commits
Steven Rostedt (VMware) committed ff04b440d2d
x86/ftrace: Clean up ftrace_regs_caller When ftrace_regs_caller was created, it was designed to preserve flags as much as possible as it needed to act just like a breakpoint triggered on the same location. But the design is over complicated as it treated all operations as modifying flags. But push, mov and lea do not modify flags. This means the code can become more simplified by allowing flags to be stored further down. Making ftrace_regs_caller simpler will also be useful in implementing fentry logic. Suggested-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org> Reviewed-by: Josh Poimboeuf <jpoimboe@redhat.com> Reviewed-by: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20170316135328.36123c3e@gandalf.local.home Link: http://lkml.kernel.org/r/20170323143445.917292592@goodmis.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>