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SubjectRe: Out of tree module build errors since v4.20-rc1
Date
> On Nov 21, 2018, at 12:56 PM, Liam R. Howlett <Liam.Howlett@Oracle.com> wrote:
>
>
> My out of tree driver build is now reporting issues with the jump table:
>
> ./include/linux/jump_label.h: In function ‘jump_entry_code’:
> ./include/linux/jump_label.h:153:14: error: dereferencing pointer to incomplete type ‘const struct jump_entry’
> return entry->code;
> ^~
> ./include/linux/jump_label.h: In function ‘jump_entry_set_init’:
> ./include/linux/jump_label.h:180:7: error: dereferencing pointer to incomplete type ‘struct jump_entry’
> entry->key |= 2;
> ^~
> ./include/linux/jump_label.h: At top level:
> ./include/linux/jump_label.h:212:26: error: array type has incomplete element type ‘struct jump_entry’
> extern struct jump_entry __start___jump_table[];
> ^~~~~~~~~~~~~~~~~~~~
> ./include/linux/jump_label.h:213:26: error: array type has incomplete element type ‘struct jump_entry’
> extern struct jump_entry __stop___jump_table[];
> ^~~~~~~~~~~~~~~~~~~
>
>
> This happens in v4.20-rc3 as well, so I bisected between v4.19 to
> v4.20-rc1 which resulted in the following commit:
>
> b34006c4258c9c86597b6b7123d6a9a3513d6cd7 is the first bad commit
> commit b34006c4258c9c86597b6b7123d6a9a3513d6cd7
> Author: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Date: Tue Sep 18 23:51:41 2018 -0700
>
> x86/jump_table: Use relative references
>
>
>
>
> Initially I assumed this was my own fault, but my module does not have
> these issues when using v4.19. Is there anything I should try/change in
> my module makefile, includes, etc to support this relative reference
> code?

Do you see HAVE_ARCH_JUMP_LABEL_RELATIVE set in your kernel config?

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