If CONFIG_MMU is not set (e.g. m68k/m5272c3_defconfig): mm/nommu.c:1671:6: error: conflicting types for ‘filemap_map_pages’ 1671 | void filemap_map_pages(struct vm_fault *vmf, | ^~~~~~~~~~~~~~~~~ In file included from mm/nommu.c:20: ./include/linux/mm.h:2578:19: note: previous declaration of ‘filemap_map_pages’ was here 2578 | extern vm_fault_t filemap_map_pages(struct vm_fault *vmf, | ^~~~~~~~~~~~~~~~~ The signature of filemap_map_pages() was changed, but the nommu implementation wasn't updated. Reported-by: noreply@xxxxxxxxxxxxxx Fixes: f9ce0be71d1fbb03 ("mm: Cleanup faultaround and finish_fault() codepaths") Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> --- Compile-tested only. Feel free to fold into the commit introducing the issue. --- mm/nommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/nommu.c b/mm/nommu.c index 870fea12823e633d..5c9ab799c0e63958 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1668,10 +1668,11 @@ vm_fault_t filemap_fault(struct vm_fault *vmf) } EXPORT_SYMBOL(filemap_fault); -void filemap_map_pages(struct vm_fault *vmf, +vm_fault_t filemap_map_pages(struct vm_fault *vmf, pgoff_t start_pgoff, pgoff_t end_pgoff) { BUG(); + return 0; } EXPORT_SYMBOL(filemap_map_pages); -- 2.25.1