The OSSTest smoke tests reports:

  sched_credit2.c: In function 'csched2_alloc_domdata':
  sched_credit2.c:3015:9: error: implicit declaration of function 'ERR_PTR' 
[-Werror=implicit-function-declaration]
           return ERR_PTR(-ENOMEM);
           ^
  sched_credit2.c:3015:9: error: nested extern declaration of 'ERR_PTR' 
[-Werror=nested-externs]

As the ERR infrastructure is part of the main scheduler interface now, include 
it from xen/sched-if.h

Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
---
CC: George Dunlap <george.dun...@eu.citrix.com>
CC: Dario Faggioli <dfaggi...@suse.com>
CC: Stefano Stabellini <sstabell...@kernel.org>
CC: Julien Grall <julien.gr...@arm.com>
---
 xen/include/xen/sched-if.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/include/xen/sched-if.h b/xen/include/xen/sched-if.h
index 4895242..c5dd43e 100644
--- a/xen/include/xen/sched-if.h
+++ b/xen/include/xen/sched-if.h
@@ -9,6 +9,7 @@
 #define __XEN_SCHED_IF_H__
 
 #include <xen/percpu.h>
+#include <xen/err.h>
 
 /* A global pointer to the initial cpupool (POOL0). */
 extern struct cpupool *cpupool0;
-- 
2.1.4


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