1 files changed, 46 insertions, 0 deletions
diff --git a/linux/dev/kernel/softirq.c b/linux/dev/kernel/softirq.c
new file mode 100644
index 0000000..96102a7
--- /dev/null
+++ b/linux/dev/kernel/softirq.c
@@ -0,0 +1,46 @@
+/*
+ *    linux/kernel/softirq.c
+ *
+ *      Copyright (C) 1992 Linus Torvalds
+ *
+ * do_bottom_half() runs at normal kernel priority: all interrupts
+ * enabled.  do_bottom_half() is atomic with respect to itself: a
+ * bottom_half handler need not be re-entrant.
+ */
+
+#define MACH_INCLUDE
+#include <linux/ptrace.h>
+#include <linux/interrupt.h>
+#include <asm/system.h>
+
+int bh_mask_count[32];
+unsigned long bh_active = 0;
+unsigned long bh_mask = 0;
+void (*bh_base[32]) (void);
+
+void
+linux_soft_intr (void)
+{
+  unsigned long active;
+  unsigned long mask, left;
+  void (**bh) (void);
+
+  sti ();
+  bh = bh_base;
+  active = bh_active & bh_mask;
+  for (mask = 1, left = ~0; left & active; bh++, mask += mask, left += left)
+    {
+      if (mask & active)
+	{
+	  void (*fn) (void);
+	  bh_active &= ~mask;
+	  fn = *bh;
+	  if (!fn)
+	    goto bad_bh;
+	  fn ();
+	}
+    }
+  return;
+bad_bh:
+  printk ("linux_soft_intr:bad interrupt handler entry %08lx\n", mask);
+}