From: Mike Rapoport <rppt@xxxxxxxxxxxxx> Subject: sparc32: use PUD rather than PGD to get PMD in srmmu_nocache_init() The kbuild test robot reported the following warning: arch/sparc/mm/srmmu.c: In function 'srmmu_nocache_init': >> arch/sparc/mm/srmmu.c:300:9: error: variable 'pud' set but not used >> [-Werror=unused-but-set-variable] 300 | pud_t *pud; This warning is caused by misprint in the page table traversal in srmmu_nocache_init() function which accessed a PMD entry using PGD rather than PUD. Since sparc32 has only 3 page table levels, the PGD and PUD are essentially the same and usage of __nocache_fix() removed the type checking. Use PUD for the consistency and to silence the compiler warning. Link: http://lkml.kernel.org/r/20200520132005.GM1059226@xxxxxxxxxxxxx Fixes: 7235db268a2777bc38 ("sparc32: use pgtable-nopud instead of 4level-fixup") Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> Reported-by: kbuild test robot <lkp@xxxxxxxxx> Cc: David S. Miller <davem@xxxxxxxxxxxxx> Cc: Anatoly Pugachev <matorola@xxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/sparc/mm/srmmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/sparc/mm/srmmu.c~sparc32-use-pud-rather-than-pgd-to-get-pmd-in-srmmu_nocache_init +++ a/arch/sparc/mm/srmmu.c @@ -333,7 +333,7 @@ static void __init srmmu_nocache_init(vo pgd = pgd_offset_k(vaddr); p4d = p4d_offset(__nocache_fix(pgd), vaddr); pud = pud_offset(__nocache_fix(p4d), vaddr); - pmd = pmd_offset(__nocache_fix(pgd), vaddr); + pmd = pmd_offset(__nocache_fix(pud), vaddr); pte = pte_offset_kernel(__nocache_fix(pmd), vaddr); pteval = ((paddr >> 4) | SRMMU_ET_PTE | SRMMU_PRIV); _
