From b008893b08dcc8c30d756db05c229a1491bcb992 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Fri, 4 Feb 2022 09:30:14 +0100 Subject: [PATCH] x86/ptrace: Always inline v8086_mode() for instrumentation Instrumentation glue like KASAN causes the following warning: vmlinux.o: warning: objtool: mce_gather_info()+0x5f: call to v8086_mode.constprop.0() leaves .noinstr.text section due to gcc creating a function call for that oneliner. Force-inline it and even save some vmlinux bytes (.config is close to an allmodconfig): text data bss dec hex filename 209431677 208257651 34411048 452100376 1af28118 vmlinux.before 209431519 208257615 34411048 452100182 1af28056 vmlinux.after Signed-off-by: Borislav Petkov Acked-by: Marco Elver Link: https://lore.kernel.org/r/20220204083015.17317-3-bp@alien8.de --- arch/x86/include/asm/ptrace.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h index 7036631..4357e0f 100644 --- a/arch/x86/include/asm/ptrace.h +++ b/arch/x86/include/asm/ptrace.h @@ -137,7 +137,7 @@ static __always_inline int user_mode(struct pt_regs *regs) #endif } -static inline int v8086_mode(struct pt_regs *regs) +static __always_inline int v8086_mode(struct pt_regs *regs) { #ifdef CONFIG_X86_32 return (regs->flags & X86_VM_MASK); -- 2.7.4