Replace the deprecated mmap callback with mmap_prepare. Commit f5cf8f07423b ("mtd: Disable mtdchar mmap on MMU systems") commented out the CONFIG_MMU part of this function back in 2012, so after ~14 years it's probably reasonable to remove this altogether rather than updating dead code. Acked-by: Richard Weinberger Signed-off-by: Lorenzo Stoakes (Oracle) --- drivers/mtd/mtdchar.c | 21 +++------------------ 1 file changed, 3 insertions(+), 18 deletions(-) diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 55a43682c567..bf01e6ac7293 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -1376,27 +1376,12 @@ static unsigned mtdchar_mmap_capabilities(struct file *file) /* * set up a mapping for shared memory segments */ -static int mtdchar_mmap(struct file *file, struct vm_area_struct *vma) +static int mtdchar_mmap_prepare(struct vm_area_desc *desc) { #ifdef CONFIG_MMU - struct mtd_file_info *mfi = file->private_data; - struct mtd_info *mtd = mfi->mtd; - struct map_info *map = mtd->priv; - - /* This is broken because it assumes the MTD device is map-based - and that mtd->priv is a valid struct map_info. It should be - replaced with something that uses the mtd_get_unmapped_area() - operation properly. */ - if (0 /*mtd->type == MTD_RAM || mtd->type == MTD_ROM*/) { -#ifdef pgprot_noncached - if (file->f_flags & O_DSYNC || map->phys >= __pa(high_memory)) - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); -#endif - return vm_iomap_memory(vma, map->phys, map->size); - } return -ENODEV; #else - return vma->vm_flags & VM_SHARED ? 0 : -EACCES; + return vma_desc_test(desc, VMA_SHARED_BIT) ? 0 : -EACCES; #endif } @@ -1411,7 +1396,7 @@ static const struct file_operations mtd_fops = { #endif .open = mtdchar_open, .release = mtdchar_close, - .mmap = mtdchar_mmap, + .mmap_prepare = mtdchar_mmap_prepare, #ifndef CONFIG_MMU .get_unmapped_area = mtdchar_get_unmapped_area, .mmap_capabilities = mtdchar_mmap_capabilities, -- 2.53.0