diff -Nur a/usr/src/nv/nv.c b/usr/src/nv/nv.c
--- a/usr/src/nv/nv.c	2008-11-04 18:17:51.000000000 -0200
+++ b/usr/src/nv/nv.c	2008-11-04 18:19:56.000000000 -0200
@@ -1296,14 +1296,22 @@
             if (get_cpu() == cpu)
                 __nv_setup_pat_entries(NULL);
             else
+            #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+                smp_call_function(__nv_setup_pat_entries, hcpu, 1);
+            #else
                 smp_call_function(__nv_setup_pat_entries, hcpu, 1, 1);
+           	#endif
             put_cpu();
             break;
         case CPU_DOWN_PREPARE:
             if (get_cpu() == cpu)
                 __nv_restore_pat_entries(NULL);
             else
+            #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+                smp_call_function(__nv_restore_pat_entries, hcpu, 1);
+            #else
                 smp_call_function(__nv_restore_pat_entries, hcpu, 1, 1);
+            #endif
             put_cpu();
             break;
     }
diff -Nur a/usr/src/nv/nv-linux.h b/usr/src/nv/nv-linux.h
--- a/usr/src/nv/nv-linux.h	2008-11-04 18:17:51.000000000 -0200
+++ b/usr/src/nv/nv-linux.h	2008-11-04 18:24:06.000000000 -0200
@@ -104,7 +104,11 @@
 #endif
 
 #include <linux/spinlock.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+#include <linux/semaphore.h>
+#else
 #include <asm/semaphore.h>
+#endif
 #include <linux/completion.h>
 #include <linux/highmem.h>
 
@@ -665,13 +669,21 @@
 #if defined(preempt_disable)
     preempt_disable();
 #endif
+    #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+    ret = smp_call_function(func, info, 1);
+    #else
     ret = smp_call_function(func, info, 1, 1);
+    #endif
     func(info);
 #if defined(preempt_enable)
     preempt_enable();
 #endif
 #else
+    #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+    ret = on_each_cpu(func, info, 1);
+    #else
     ret = on_each_cpu(func, info, 1, 1);
+    #endif
 #endif
     return ret;
 }
diff -Nur a/usr/src/nv/os-interface.c b/usr/src/nv/os-interface.c
--- a/usr/src/nv/os-interface.c	2008-11-04 18:17:51.000000000 -0200
+++ b/usr/src/nv/os-interface.c	2008-11-04 18:19:56.000000000 -0200
@@ -48,7 +48,11 @@
 #endif
     local_bh_disable();
     atomic_set(&os_smp_barrier, 1);
+    #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
+    ret = smp_call_function(ipi_handler, NULL, 0);
+    #else
     ret = smp_call_function(ipi_handler, NULL, 1, 0);
+    #endif
 #endif
     return (ret == 0) ? RM_OK : RM_ERROR;
 }
@@ -704,7 +708,7 @@
     U032 sig
 )
 {
-    return kill_proc(pid, sig, 1) ? RM_ERR_OPERATING_SYSTEM : RM_OK;
+    return send_sig(sig, find_task_by_vpid(pid), 0) ? RM_ERR_OPERATING_SYSTEM : RM_OK;
 }
 
 /*******************************************************************************/