The quilt patch titled Subject: mm: recover pud_leaf() definitions in nopmd case has been removed from the -mm tree. Its filename was mm-recover-pud_leaf-definitions-in-nopmd-case.patch This patch was dropped because it was merged into the mm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Peter Xu <peterx@xxxxxxxxxx> Subject: mm: recover pud_leaf() definitions in nopmd case Date: Mon, 11 Mar 2024 12:10:45 -0400 This reverts one change in commit 924bd6a8c967 ("mm/x86: drop two unnecessary pud_leaf() definitions"). One issue with that is it broke nopmd builds for at least both arm64 and riscv (CONFIG_PGTABLE_LEVELS=2). The other issue is it was overlooked that it's a common change rather than x86 specific (relevant to the commit message of the commit). Normally there's no need for empty definition of pXd_leaf() because of the fallback functions, however this logic may not apply to pgtable-nopmd.h, because that's a header that can even be used by arch *pgtable.h headers, which can use the *_leaf() definitions _before_ the fallback functions are defined. Leave it there to pass PGTABLE_LEVELS=2 builds. Link: https://lkml.kernel.org/r/Ze8vFNV9YSdgC2S7@x1n Fixes: 924bd6a8c967 ("mm/x86: drop two unnecessary pud_leaf() definitions") Signed-off-by: Peter Xu <peterx@xxxxxxxxxx> Reported-by: kernel test robot <lkp@xxxxxxxxx> Closes: https://lore.kernel.org/oe-kbuild-all/202403090900.OwPqmRuI-lkp@xxxxxxxxx/ Closes: https://lore.kernel.org/oe-kbuild-all/202403101607.a42gaLOS-lkp@xxxxxxxxx/ Cc: Jason Gunthorpe <jgg@xxxxxxxxxx> Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/asm-generic/pgtable-nopmd.h | 1 + 1 file changed, 1 insertion(+) --- a/include/asm-generic/pgtable-nopmd.h~mm-recover-pud_leaf-definitions-in-nopmd-case +++ a/include/asm-generic/pgtable-nopmd.h @@ -31,6 +31,7 @@ static inline int pud_none(pud_t pud) { static inline int pud_bad(pud_t pud) { return 0; } static inline int pud_present(pud_t pud) { return 1; } static inline int pud_user(pud_t pud) { return 0; } +static inline int pud_leaf(pud_t pud) { return 0; } static inline void pud_clear(pud_t *pud) { } #define pmd_ERROR(pmd) (pud_ERROR((pmd).pud)) _ Patches currently in -mm which might be from peterx@xxxxxxxxxx are