--- zzzz-none-000/linux-3.10.107/arch/mips/fw/cfe/cfe_api.c	2017-06-27 09:49:32.000000000 +0000
+++ vr9-7490-729/linux-3.10.107/arch/mips/fw/cfe/cfe_api.c	2021-11-10 11:53:53.000000000 +0000
@@ -406,12 +406,12 @@
 	return xiocb.xiocb_status;
 }
 
-int cfe_write(int handle, unsigned char *buffer, int length)
+int cfe_write(int handle, const char *buffer, int length)
 {
 	return cfe_writeblk(handle, 0, buffer, length);
 }
 
-int cfe_writeblk(int handle, s64 offset, unsigned char *buffer, int length)
+int cfe_writeblk(int handle, s64 offset, const char *buffer, int length)
 {
 	struct cfe_xiocb xiocb;