Merge branch 'linus' into x86/irq

[linux-2.6] / include / asm-x86 / desc.h

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index 268a012bcd795e7540d831ca4a37381057235fcc..b3875d4b4fab9b3410a01a28156a1d919cb28cf4 100644 (file)
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -311,6 +311,28 @@ static inline void set_intr_gate(unsigned int n, void *addr)
        _set_gate(n, GATE_INTERRUPT, addr, 0, 0, __KERNEL_CS);
 }
 
+#define SYS_VECTOR_FREE                0
+#define SYS_VECTOR_ALLOCED     1
+
+extern int first_system_vector;
+extern char system_vectors[];
+
+static inline void alloc_system_vector(int vector)
+{
+       if (system_vectors[vector] == SYS_VECTOR_FREE) {
+               system_vectors[vector] = SYS_VECTOR_ALLOCED;
+               if (first_system_vector > vector)
+                       first_system_vector = vector;
+       } else
+               BUG();
+}
+
+static inline void alloc_intr_gate(unsigned int n, void *addr)
+{
+       alloc_system_vector(n);
+       set_intr_gate(n, addr);
+}
+
 /*
  * This routine sets up an interrupt gate at directory privilege level 3.
  */