tree 20d7f57eae99fe83b8fbdae112a6a0facc5b552d
parent 66a9a4ffda3474b193f36ed579cee06c597952f3
author Ralf Baechle <ralf@linux-mips.org> 1142422591 +0000
committer Ralf Baechle <ralf@linux-mips.org> 1142701168 +0000

[MIPS] Work around bad code generation for <asm/io.h>.
    
If a call to set_io_port_base() was being followed by usage of
mips_io_port_base in the same function gcc was possibly using the old
value due to some clever abuse of const.  Adding a barrier will keep
the optimization and result in correct code with latest gcc.
    
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>