treewide: Add a function to change page permissions

For armv8 we are adding proper page permissions for the relocated U-Boot
binary. Add a weak function that can be used across architectures to change
the page permissions

Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on AML-S905X-CC
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

1 files changed, 6 insertions, 0 deletions

diff --git a/arch/arc/lib/cache.c b/arch/arc/lib/cache.c
index 5169fc627fa..08f9e7dceac 100644
--- a/arch/arc/lib/cache.c
+++ b/arch/arc/lib/cache.c
@@ -8,6 +8,7 @@
 #include <asm/global_data.h>
 #include <linux/bitops.h>
 #include <linux/compiler.h>
+#include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/log2.h>
 #include <asm/arcregs.h>
@@ -819,3 +820,8 @@ void sync_n_cleanup_cache_all(void)
 
 	__ic_entire_invalidate();
 }
+
+int __weak pgprot_set_attrs(phys_addr_t addr, size_t size, enum pgprot_attrs perm)
+{
+	return -ENOSYS;
+}