Re: [patch V4 part 2 06/18] x86/entry: Move irq flags tracing to prepare_exit_to_usermode()

[Andy Lutomirski]

On Tue, May 5, 2020 at 7:14 AM Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
>
> This is another step towards more C-code and less convoluted ASM.
>
> Similar to the entry path, invoke the tracer before context tracking which
> might turn off RCU and invoke lockdep as the last step before going back to
> user space. Annotate the code sections in exit_to_user_mode() accordingly
> so objtool won't complain about the tracer invocation.

Acked-by: Andy Lutomirski <luto@xxxxxxxxxx>

Note to self: the nmi code needs to be reworked to go through
prepare_exit_to_usermode(), too.  I'll do this once this whole pile
lands.