[PATCH] KVM: arm64: Don't use FIELD_PREP() in initialisers

[Marc Zyngier]

Nathan reports that compiling with CONFIG_PTDUMP_STAGE2_DEBUGFS
results in a compilation failure, with the compiler moaning about
"braced-group within expression allowed only inside a function"...

Replace FIELD_PREP() with its shifting primitive, which does the
trick here.

Reported-by: Nathan Chancellor <nathan at kernel.org>
Fixes: 81e9fe5c6f25d ("KVM: arm64: Teach ptdump about FEAT_XNX permissions")
Closes: https://lore.kernel.org/r/20251125173929.GA3256322@ax162
Signed-off-by: Marc Zyngier <maz at kernel.org>
---
 arch/arm64/kvm/ptdump.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kvm/ptdump.c b/arch/arm64/kvm/ptdump.c
index bd722383d0e3f..6cbe018fd6fda 100644
--- a/arch/arm64/kvm/ptdump.c
+++ b/arch/arm64/kvm/ptdump.c
@@ -46,22 +46,22 @@ static const struct ptdump_prot_bits stage2_pte_bits[] = {
 	},
 	{
 		.mask	= KVM_PTE_LEAF_ATTR_HI_S2_XN,
-		.val	= FIELD_PREP(KVM_PTE_LEAF_ATTR_HI_S2_XN, 0b00),
+		.val	= 0b00UL << __bf_shf(KVM_PTE_LEAF_ATTR_HI_S2_XN),
 		.set	= "px ux ",
 	},
 	{
 		.mask	= KVM_PTE_LEAF_ATTR_HI_S2_XN,
-		.val	= FIELD_PREP(KVM_PTE_LEAF_ATTR_HI_S2_XN, 0b01),
+		.val	= 0b01UL << __bf_shf(KVM_PTE_LEAF_ATTR_HI_S2_XN),
 		.set	= "PXNux ",
 	},
 	{
 		.mask	= KVM_PTE_LEAF_ATTR_HI_S2_XN,
-		.val	= FIELD_PREP(KVM_PTE_LEAF_ATTR_HI_S2_XN, 0b10),
+		.val	= 0b10UL << __bf_shf(KVM_PTE_LEAF_ATTR_HI_S2_XN),
 		.set	= "PXNUXN",
 	},
 	{
 		.mask	= KVM_PTE_LEAF_ATTR_HI_S2_XN,
-		.val	= FIELD_PREP(KVM_PTE_LEAF_ATTR_HI_S2_XN, 0b11),
+		.val	= 0b11UL << __bf_shf(KVM_PTE_LEAF_ATTR_HI_S2_XN),
 		.set	= "px UXN",
 	},
 	{
-- 
2.47.3