On Thu, 27 Jun 2019 20:21:09 -0500 Josh Poimboeuf <jpoimboe@xxxxxxxxxx> wrote: > On Thu, Jun 27, 2019 at 09:18:19PM -0400, Steven Rostedt wrote: > > > > From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx> > > > > Taking the text_mutex in ftrace_arch_code_modify_prepare() is to fix a > > race against module loading and live kernel patching that might try to > > change the text permissions while ftrace has it as read/write. This > > really needs to be documented in the code. Add a comment that does such. > > > > Suggested-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> > > Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> > > Reviewed-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> > Thanks! -- Steve
