Messages in this thread | | | Date | Fri, 28 Jun 2019 12:54:14 +0200 | From | Petr Mladek <> | Subject | Re: [PATCH] ftrace/x86: Add a comment to why we take text_mutex in ftrace_arch_code_modify_prepare() |
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On Thu 2019-06-27 21:18:19, Steven Rostedt wrote: > > From: "Steven Rostedt (VMware)" <rostedt@goodmis.org> > > 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@redhat.com> > Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Best Regards, Petr
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