linux-kernel - [patch 2/2] x86/vdso: Prevent empty switch case warning

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Message-ID: <20260117215542.405790227@kernel.org>
Date: Sat, 17 Jan 2026 22:58:27 +0100
From: Thomas Gleixner <tglx@...nel.org>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org,
 Thomas Weißschuh <thomas.weissschuh@...utronix.de>
Subject: [patch 2/2] x86/vdso: Prevent empty switch case warning

Sparse complains rightfully when CONFIG_PARAVIRT_CLOCK and
CONFIG_HYPERV_TIMER are both not set:

  arch/x86/entry/vdso/vma.c:94:9: warning: switch with no cases

Add a default case to fix that.

Signed-off-by: Thomas Gleixner <tglx@...nel.org>
---
 arch/x86/entry/vdso/vma.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -114,6 +114,8 @@ static vm_fault_t vvar_vclock_fault(cons
 		break;
 	}
 #endif /* CONFIG_HYPERV_TIMER */
+	default:
+		break;
 	}
 
 	return VM_FAULT_SIGBUS;