In s390x_kvtop() early return may take place despite the verbose flag. Thus we can miss page-table walk information in the vtop output for kernel virtual addresses. Make sure that s390x_vtop() is always called for kernel virtual addresses when the verbose flag is passed to s390x_kvtop() by do_vtop(). Suggested-by: Heiko Carstens <hca(a)linux.ibm.com&gt; Signed-off-by: Mikhail Zaslonko <zaslonko(a)linux.ibm.com&gt; --- s390x.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/s390x.c b/s390x.c index 8c0bba4..cb5a0dd 100644 --- a/s390x.c +++ b/s390x.c @@ -947,18 +947,15 @@ s390x_kvtop(struct task_context *tc, ulong vaddr, physaddr_t *paddr, int verbose if (!IS_KVADDR(vaddr)){ *paddr = 0; return FALSE; } - if (!vt->vmalloc_start) { - *paddr = VTOP(vaddr); - return TRUE; - } - - if (!IS_VMALLOC_ADDR(vaddr)) { - *paddr = VTOP(vaddr); - return TRUE; + if (!verbose) { + if (!vt->vmalloc_start || !IS_VMALLOC_ADDR(vaddr)) { + *paddr = VTOP(vaddr); + return TRUE; + } } pgd_base = (unsigned long)vt->kernel_pgd[0]; return s390x_vtop(pgd_base, vaddr, paddr, verbose); } -- 2.49.0