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Due to the explicit 'noinline' GCC-7.3 is not able to optimize away the
argument setup of:
apply_ibt_endbr(__ibt_endbr_seal, __ibt_enbr_seal_end);
even when X86_KERNEL_IBT=n and the function is an empty stub, which leads
to link errors due to missing __ibt_endbr_seal* symbols:
ld: arch/x86/kernel/alternative.o: in function `alternative_instructions':
alternative.c:(.init.text+0x15d): undefined reference to `__ibt_endbr_seal_end'
ld: alternative.c:(.init.text+0x164): undefined reference to `__ibt_endbr_seal'
Remove the explicit 'noinline' to help gcc optimize them away.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20221011113803.956808-1-linmiaohe@huawei.com
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