quoted

quoted

WARNING: externs should be avoided in .c files
#331: FILE: drivers/misc/rp1/rp1-pci.c:58:
+extern char __dtbo_rp1_pci_begin[];

True, but in this case we don't have a symbol that should be exported to other
translation units, it just needs to be referenced inside the driver and
consumed locally. Hence it would be better to place the extern in .c file.

 
Did you try making it static.

The dtso is compiled into an obj and linked with the driver which is in
a different transaltion unit. I'm not aware on other ways to include that
symbol without declaring it extern (the exception being some hackery 
trick that compile the dtso into a .c file to be included into the driver
main source file). 
Or probably I'm not seeing what you are proposing, could you please elaborate
on that?

Sorry, i jumped to the wrong conclusion. Often it is missing static
keyword which causes warnings. However, you say it needs to be global
scope.

Reading the warning again:

quoted

quoted

WARNING: externs should be avoided in .c files

It is wanting you to put it in a .h file, which then gets
included by the two users.

	Andrew