Messages in this thread | | | Date | Mon, 5 Feb 2018 07:50:01 -0800 | From | Andi Kleen <> | Subject | Re: [PATCH 1/2] modpost: don't add warnings for LTO-generated symbols |
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On Mon, Feb 05, 2018 at 04:12:52PM +0100, Arnd Bergmann wrote: > WARNING: vmlinux.o(.data+0x12e0): Section mismatch in reference from the variable pfkey_net_ops.lto_priv.2992 to the function .init.text:pfkey_net_init.lto_priv.2977() > The variable pfkey_net_ops.lto_priv.2992 references > the function __init pfkey_net_init.lto_priv.2977() > If the reference is valid then annotate the > variable with __init* or __refdata (see linux/init.h) or name the variable: > *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
A better fix would be to ensure modpost always runs on already LD_FINALed objects, so it never sees LTO.
Otherwise you would need to teach modpost about the LTO symbol table and some other magic. I did that once, but it turned out to be very ugly.
-Andi
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