On Tue, Feb 18, 2014 at 03:28:43PM +0100, Andi Kleen wrote:
> From: Joe Mario <jmario@xxxxxxxxxx>
>
> Here is the workaround I made for having the kernel not reject modules
> built with -flto. The clean solution would be to get the compiler to not
> emit the symbol. Or if it has to emit the symbol, then emit it as
> initialized data but put it into a comdat/linkonce section.
>
> Minor tweaks by AK over Joe's patch.
Should Joe's SOB be on this patch ?
>
> Cc: rusty@xxxxxxxxxxxxxxx
> Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
> ---
> kernel/module.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/kernel/module.c b/kernel/module.c
> index d24fcf2..b99e801 100644
> --- a/kernel/module.c
> +++ b/kernel/module.c
> @@ -1948,6 +1948,10 @@ static int simplify_symbols(struct module *mod, const struct load_info *info)
>
> switch (sym[i].st_shndx) {
> case SHN_COMMON:
> + /* Ignore common symbols */
> + if (!strncmp(name, "__gnu_lto", 9))
> + break;
> +
> /* We compiled with -fno-common. These are not
> supposed to happen. */
> pr_debug("Common symbol: %s\n", name);
> --
> 1.8.5.2
>
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