Le 14/06/2022 à 08:09, Wenhu Wang a écrit :

quoted

quoted

+static const struct vm_operations_struct uio_cache_sram_vm_ops = {
+#ifdef CONFIG_HAVE_IOREMAP_PROT

Same here.

I tried to eliminate it in mainline
See: [PATCH v2] mm: eliminate ifdef of HAVE_IOREMAP_PROT in .c files
https://lkml.org/lkml/2022/6/10/695

I looked at that patch.

I don't think you can just drop the #ifdef in function 
__access_remote_vm() in mm/memory.c

You have to replace it with something like:

	if (!IS_ENABLED(CONFIG_HAVE_IOREMAP_PROT))
		break;

Christophe