Hi all, After merging the akpm tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: arch/powerpc/kvm/book3s_64_mmu_radix.c: In function 'debugfs_radix_read': arch/powerpc/kvm/book3s_64_mmu_radix.c:1226:8: error: unused variable 'pgd' [-Werror=unused-variable] 1226 | pgd_t pgd, *pgdp; | ^~~ cc1: all warnings being treated as errors Caused by commit cad54c147231 ("powerpc: add support for folded p4d page tables") I applied the following fix patch: From: Stephen Rothwell Date: Mon, 2 Mar 2020 15:19:40 +1100 Subject: [PATCH] fix for "powerpc: add support for folded p4d page tables" Signed-off-by: Stephen Rothwell --- arch/powerpc/kvm/book3s_64_mmu_radix.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index beb694285100..3fb598659420 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -1223,7 +1223,7 @@ static ssize_t debugfs_radix_read(struct file *file, char __user *buf, unsigned long gpa; pgd_t *pgt; struct kvm_nested_guest *nested; - pgd_t pgd, *pgdp; + pgd_t *pgdp; p4d_t p4d, *p4dp; pud_t pud, *pudp; pmd_t pmd, *pmdp; -- 2.25.0 -- Cheers, Stephen Rothwell