linux-kernel - [PATCH 2/2] x86/fred: Fix build with CONFIG_IA32

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Date: Sat, 27 Jan 2024 01:37:28 -0800
From: Xin Li <xin3.li@...el.com>
To: linux-kernel@...r.kernel.org
Cc: tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com,
	x86@...nel.org,
	hpa@...or.com,
	luto@...nel.org,
	ravi.v.shankar@...el.com,
	andrew.cooper3@...rix.com
Subject: [PATCH 2/2] x86/fred: Fix build with CONFIG_IA32_EMULATION=n

When CONFIG_IA32_EMULATION=n, int80_emulation() is NOT defined, fix it.

Fixes: 5e0636a41485 ("x86/fred: FRED entry/exit and dispatch code")
Link: https://lore.kernel.org/lkml/20240126100519.GBZbOD3xFB0v3mp5B1@fat_crate.local/
Reported-by: Borislav Petkov (AMD) <bp@...en8.de>
Signed-off-by: Xin Li <xin3.li@...el.com>
---
 arch/x86/entry/entry_fred.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/entry/entry_fred.c b/arch/x86/entry/entry_fred.c
index 06d00c60ea64..ac120cbdaaf2 100644
--- a/arch/x86/entry/entry_fred.c
+++ b/arch/x86/entry/entry_fred.c
@@ -62,11 +62,13 @@ static noinstr void fred_intx(struct pt_regs *regs)
 	case X86_TRAP_OF:
 		return exc_overflow(regs);
 
+#ifdef CONFIG_IA32_EMULATION
 	/* INT80 */
 	case IA32_SYSCALL_VECTOR:
 		if (ia32_enabled())
 			return int80_emulation(regs);
 		fallthrough;
+#endif
 
 	default:
 		return exc_general_protection(regs, 0);
-- 
2.43.0