As from commit 8f99a1626535 ("MIPS: Tracing: Add IRQENTRY_EXIT section for MIPS") do_IRQ() is not a macro anymore and can be invoked directly from assembly code again, however its `asmlinkage' annotation has never been brought back from the previous removal of the function with commit 187933f23679 ("[MIPS] do_IRQ cleanup"). Since calling the function directly from assembly code has a performance advantage, add the annotation back so that the DEC platform can make use of this again. Signed-off-by: Maciej W. Rozycki <macro@orcam.me.uk> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>