With Clang's Link Time Optimization (LTO), the compiler can rename
static functions to avoid global naming collisions. As PCI fixup
functions are typically static, renaming can break references
to them in inline assembly. This change adds a global stub to
DECLARE_PCI_FIXUP_SECTION to fix the issue when PREL32 relocations
are used.
Bug: 145210207
Change-Id: Iaf4a28d14c5ab86d49d6fec07704c3cb48301d64
Link: https://lore.kernel.org/lkml/20201211184633.3213045-10-samitolvanen@google.com/
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
7ffcc1cf4c