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x86/alternative: Remove noinline from __ibt_endbr_seal[_end]() stubs
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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@ -624,7 +624,7 @@ void __init_or_module noinline apply_ibt_endbr(s32 *start, s32 *end)
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#else
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void __init_or_module noinline apply_ibt_endbr(s32 *start, s32 *end) { }
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void __init_or_module apply_ibt_endbr(s32 *start, s32 *end) { }
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#endif /* CONFIG_X86_KERNEL_IBT */
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