[SPARC32]: Fix modular build of floppy driver.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 59 insertions, 25 deletions

diff --git a/arch/sparc/kernel/irq.c b/arch/sparc/kernel/irq.c
index 75b2240ad0f..b76dc03fc31 100644
--- a/arch/sparc/kernel/irq.c
+++ b/arch/sparc/kernel/irq.c
@@ -351,34 +351,14 @@ void handler_irq(int irq, struct pt_regs * regs)
         set_irq_regs(old_regs);
 }
 
-#ifdef CONFIG_BLK_DEV_FD
-extern void floppy_interrupt(int irq, void *dev_id);
-
-void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
-{
-        struct pt_regs *old_regs;
-        int cpu = smp_processor_id();
-
-        old_regs = set_irq_regs(regs);
-        disable_pil_irq(irq);
-        irq_enter();
-        kstat_cpu(cpu).irqs[irq]++;
-        floppy_interrupt(irq, dev_id);
-        irq_exit();
-        enable_pil_irq(irq);
-        set_irq_regs(old_regs);
-        // XXX Eek, it's totally changed with preempt_count() and such
-        // if (softirq_pending(cpu))
-        //      do_softirq();
-}
-#endif
+#if defined(CONFIG_BLK_DEV_FD) || defined(CONFIG_BLK_DEV_FD_MODULE)
 
 /* Fast IRQs on the Sparc can only have one routine attached to them,
  * thus no sharing possible.
  */
-int request_fast_irq(unsigned int irq,
-                     irq_handler_t handler,
-                     unsigned long irqflags, const char *devname)
+static int request_fast_irq(unsigned int irq,
+                            void (*handler)(void),
+                            unsigned long irqflags, const char *devname)
 {
         struct irqaction *action;
         unsigned long flags;
@@ -457,7 +437,6 @@ int request_fast_irq(unsigned int irq,
          */
         flush_cache_all();
 
-        action->handler = handler;
         action->flags = irqflags;
         cpus_clear(action->mask);
         action->name = devname;
@@ -475,6 +454,61 @@ out:
         return ret;
 }
 
+/* These variables are used to access state from the assembler
+ * interrupt handler, floppy_hardint, so we cannot put these in
+ * the floppy driver image because that would not work in the
+ * modular case.
+ */
+volatile unsigned char *fdc_status;
+EXPORT_SYMBOL(fdc_status);
+
+char *pdma_vaddr;
+EXPORT_SYMBOL(pdma_vaddr);
+
+unsigned long pdma_size;
+EXPORT_SYMBOL(pdma_size);
+
+volatile int doing_pdma;
+EXPORT_SYMBOL(doing_pdma);
+
+char *pdma_base;
+EXPORT_SYMBOL(pdma_base);
+
+unsigned long pdma_areasize;
+EXPORT_SYMBOL(pdma_areasize);
+
+extern void floppy_hardint(void);
+
+static irqreturn_t (*floppy_irq_handler)(int irq, void *dev_id);
+
+void sparc_floppy_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct pt_regs *old_regs;
+        int cpu = smp_processor_id();
+
+        old_regs = set_irq_regs(regs);
+        disable_pil_irq(irq);
+        irq_enter();
+        kstat_cpu(cpu).irqs[irq]++;
+        floppy_irq_handler(irq, dev_id);
+        irq_exit();
+        enable_pil_irq(irq);
+        set_irq_regs(old_regs);
+        // XXX Eek, it's totally changed with preempt_count() and such
+        // if (softirq_pending(cpu))
+        //      do_softirq();
+}
+
+int sparc_floppy_request_irq(int irq, unsigned long flags,
+                             irqreturn_t (*irq_handler)(int irq, void *))
+{
+        floppy_irq_handler = irq_handler;
+        return request_fast_irq(irq, floppy_hardint, flags, "floppy");
+}
+EXPORT_SYMBOL(sparc_floppy_request_irq);
+
+#endif
+
 int request_irq(unsigned int irq,
                 irq_handler_t handler,
                 unsigned long irqflags, const char * devname, void *dev_id)