m68k: Mac IRQ cleanup

There are no slow IRQs on Macs since Roman Zippel's IRQ reorganisation that
went into 2.6.16 and removed mac_irq_list[] and the do_mac_irq_list()
dispatcher. (They were implemented in do_mac_irq_list() by lowering the IPL.)
Hence there's no more use for mutual exclusion in the Mac interrupt
dispatchers. Remove it.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
index 1dba88247c6f..d66f723b17c3 100644
--- a/arch/m68k/mac/psc.c
+++ b/arch/m68k/mac/psc.c
@@ -147,10 +147,8 @@ irqreturn_t psc_irq(int irq, void *dev_id)
         irq_bit = 1;
         do {
                 if (events & irq_bit) {
-                        psc_write_byte(pIER, irq_bit);
                         psc_write_byte(pIFR, irq_bit);
                         m68k_handle_int(irq_num);
-                        psc_write_byte(pIER, irq_bit | 0x80);
                 }
                 irq_num++;
                 irq_bit <<= 1;