The following commit has been merged into the x86/urgent branch of tip: Commit-ID: 023e59d4cee91dd3ca811eb01db2c5fb9f783dc2 Gitweb: https://git.kernel.org/tip/023e59d4cee91dd3ca811eb01db2c5fb9f783dc2 Author: Miaohe Lin <linmiaohe@xxxxxxxxxx> AuthorDate: Tue, 11 Oct 2022 19:38:03 +08:00 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Fri, 02 Dec 2022 12:54:43 +01:00 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@xxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20221011113803.956808-1-linmiaohe@xxxxxxxxxx --- arch/x86/kernel/alternative.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 5cadcea..beaf9fc 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -624,7 +624,7 @@ void __init_or_module noinline apply_ibt_endbr(s32 *start, s32 *end) #else -void __init_or_module noinline apply_ibt_endbr(s32 *start, s32 *end) { } +void __init_or_module apply_ibt_endbr(s32 *start, s32 *end) { } #endif /* CONFIG_X86_KERNEL_IBT */
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