[Xen-devel] PV-on-HVM: Define BLOCKING_NOTIFIER_HEAD macro for old Linux kernels.

["KUWAMURA Shin'ya" <kuwa@xxxxxxxxxxxxxx>]

Hi,

This fixes build errors of PV-on-HVM drivers for RHEL4U2:
  
/ia64/xen-unstable.hg/unmodified_drivers/linux-2.6/platform-pci/../xenbus/xenbus_probe.c:72:
 warning: type defaults to `int' in declaration of `BLOCKING_NOTIFIER_HEAD'
  
/ia64/xen-unstable.hg/unmodified_drivers/linux-2.6/platform-pci/../xenbus/xenbus_probe.c:72:
 warning: parameter names (without types) in function declaration
  
/ia64/xen-unstable.hg/unmodified_drivers/linux-2.6/platform-pci/../xenbus/xenbus_probe.c:
 In function `register_xenstore_notifier':
  
/ia64/xen-unstable.hg/unmodified_drivers/linux-2.6/platform-pci/../xenbus/xenbus_probe.c:828:
 warning: implicit declaration of function `blocking_notifier_chain_register'
  
/ia64/xen-unstable.hg/unmodified_drivers/linux-2.6/platform-pci/../xenbus/xenbus_probe.c:828:
 error: `xenstore_chain' undeclared (first use in this function)

Signed-off-by: KUWAMURA Shin'ya <kuwa@xxxxxxxxxxxxxx>
-- 
  KUWAMURA Shin'ya

# HG changeset patch
# User KUWAMURA Shin'ya <kuwa@xxxxxxxxxxxxxx>
# Date 1193894682 -32400
# Node ID 6b9ce04ef91469975da1a12ddfbc552fb6f468e0
# Parent  a07288a8478521002c2302ad18fac52eb6600055
PV-on-HVM: Define BLOCKING_NOTIFIER_HEAD macro for old Linux kernels.

These definition are required for RHEL4U2(2.6.9-22.EL).

Signed-off-by: KUWAMURA Shin'ya <kuwa@xxxxxxxxxxxxxx>

diff -r a07288a84785 -r 6b9ce04ef914 
unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h
--- a/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h Tue Oct 
30 15:34:44 2007 -0600
+++ b/unmodified_drivers/linux-2.6/compat-include/xen/platform-compat.h Thu Nov 
01 14:24:42 2007 +0900
@@ -49,6 +49,13 @@
 #define atomic_notifier_chain_register(chain,nb) 
notifier_chain_register(chain,nb)
 #define atomic_notifier_chain_unregister(chain,nb) 
notifier_chain_unregister(chain,nb)
 #define atomic_notifier_call_chain(chain,val,v) 
notifier_call_chain(chain,val,v)
+#endif
+
+#if defined (_LINUX_NOTIFIER_H) && !defined BLOCKING_NOTIFIER_HEAD
+#define BLOCKING_NOTIFIER_HEAD(name) struct notifier_block *name
+#define blocking_notifier_chain_register(chain,nb) 
notifier_chain_register(chain,nb)
+#define blocking_notifier_chain_unregister(chain,nb) 
notifier_chain_unregister(chain,nb)
+#define blocking_notifier_call_chain(chain,val,v) 
notifier_call_chain(chain,val,v)
 #endif
 
 #if defined(_LINUX_MM_H) && defined set_page_count

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