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

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+
+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

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+     .access = generic_access_phys,
+#endif
+};

Another solution is to do:


static const struct vm_operations_struct uio_cache_sram_vm_ops = {
	.access = IS_ENABLED(CONFIG_HAVE_IOREMAP_PROT) ? generic_access_phys : 
NULL,
};


Christophe