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authorMasahiro Yamada <masahiroy@kernel.org>2022-06-06 13:59:20 +0900
committerJuergen Gross <jgross@suse.com>2022-06-07 08:11:35 +0200
commitdbac14a5a05ff8e1ce7c0da0e1f520ce39ec62ea (patch)
tree6201cb85c327e6ae14d5e11f054f543dab24947a /arch
parentfea981610c25173e6e5d63ccd4fce49739663ab0 (diff)
xen: unexport __init-annotated xen_xlate_map_ballooned_pages()
EXPORT_SYMBOL and __init is a bad combination because the .init.text section is freed up after the initialization. Hence, modules cannot use symbols annotated __init. The access to a freed symbol may end up with kernel panic. modpost used to detect it, but it has been broken for a decade. Recently, I fixed modpost so it started to warn it again, then this showed up in linux-next builds. There are two ways to fix it: - Remove __init - Remove EXPORT_SYMBOL I chose the latter for this case because none of the in-tree call-sites (arch/arm/xen/enlighten.c, arch/x86/xen/grant-table.c) is compiled as modular. Fixes: 243848fc018c ("xen/grant-table: Move xlated_setup_gnttab_pages to common place") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org> Link: https://lore.kernel.org/r/20220606045920.4161881-1-masahiroy@kernel.org Signed-off-by: Juergen Gross <jgross@suse.com>
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