Re: [PATCH v3] xen: Work around Clang generating .data.rel.ro section for init-only files

[Andrew Cooper <andrew.cooper3@citrix.com>]

On 23/02/16 18:36, Andrew Cooper wrote:
> Clang-3.8 generates several .data.rel.ro sections when compiling Xen.  As
> these contain no global symbols, they should be .data.rel.ro.local.  This
> breaks the SPECIAL_DATA_SECTIONS check when converting the transition units to
> being init-only.
>
> For alternatives.c, explicitly move the nops arrays into __initconst.  For efi
> boot.c, manually create the optimisation performed by Clang by collapsing the
> switch statement into a lookup table.  The double use of const is required to
> avoid breaking the ARM build by creating a section type conflict with
> fdt_guid.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
> ---
> CC: Jan Beulich <JBeulich@suse.com>
>

Would you mind testing this on whichever older compiler suffered the
original symptoms?  I can't find such a compiler to test with.

~Andrew