[PATCH] KVM: arm64: Add break to default case in kvm_pgtable_stage2_pte_prot()

[Nathan Chancellor]

Clang warns (or errors with CONFIG_WERROR=y / W=e):

  arch/arm64/kvm/hyp/pgtable.c:757:2: error: label at end of compound statement is a C23 extension [-Werror,-Wc23-extensions]
    757 |         }
        |         ^

With older versions of clang (15 and older) and GCC (at least the minimum
supported, 8.1), this is an unconditional hard error:

  arch/arm64/kvm/hyp/pgtable.c: In function 'kvm_pgtable_stage2_pte_prot':
  arch/arm64/kvm/hyp/pgtable.c:756:2: error: label at end of compound statement
    default:
    ^~~~~~~

  arch/arm64/kvm/hyp/pgtable.c:756:10: error: label at end of compound statement: expected statement
          default:
                  ^
                   ;

Add a break statement to this default case to clear up the error/warning.

Fixes: 2608563b466b ("KVM: arm64: Add support for FEAT_XNX stage-2 permissions")
Signed-off-by: Nathan Chancellor <nathan at kernel.org>
---
 arch/arm64/kvm/hyp/pgtable.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c
index 57e13a5d0405..947ac1a951a5 100644
--- a/arch/arm64/kvm/hyp/pgtable.c
+++ b/arch/arm64/kvm/hyp/pgtable.c
@@ -754,6 +754,7 @@ enum kvm_pgtable_prot kvm_pgtable_stage2_pte_prot(kvm_pte_t pte)
 		prot |= KVM_PGTABLE_PROT_PX;
 		break;
 	default:
+		break;
 	}
 
 	return prot;

---
base-commit: b5e3afe91cfa420076851bbd833f11ecd3fab74d
change-id: 20251125-arm64-kvm-hyp-pgtable-fix-c23-ext-warn-851b6b5e76fe

Best regards,
--  
Nathan Chancellor <nathan at kernel.org>