[PATCH] uml: avoid "CONFIG_NR_CPUS undeclared" bogus error messages

      Olaf Hering <olh@suse.de>

Olaf reported UML doesn't build for him with a clear analisys of what happened
- we're using NR_CPUS in files linked against glibc headers.  Seems like it
defines CONFIG_SMP but not CONFIG_NR_CPUS, so we get CONFIG_NR_CPUS
undeclared.

The fix is to move the declaration away from that header file and move it in
asm-um headers, and to add that header where needed.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 3 insertions, 2 deletions

diff --git a/arch/um/include/kern_util.h b/arch/um/include/kern_util.h
index c649108a9e9f..07176d92e1c9 100644
--- a/arch/um/include/kern_util.h
+++ b/arch/um/include/kern_util.h
@@ -31,8 +31,6 @@ extern int timer_irq_inited;
 extern int jail;
 extern int nsyscalls;
 
-extern struct task_struct *idle_threads[NR_CPUS];
-
 #define UML_ROUND_DOWN(addr) ((void *)(((unsigned long) addr) & PAGE_MASK))
 #define UML_ROUND_UP(addr) \
         UML_ROUND_DOWN(((unsigned long) addr) + PAGE_SIZE - 1)
diff --git a/arch/um/kernel/reboot.c b/arch/um/kernel/reboot.c
index 6f1a3a288117..3ef73bf2e781 100644
--- a/arch/um/kernel/reboot.c
+++ b/arch/um/kernel/reboot.c
@@ -5,6 +5,7 @@
 
 #include "linux/module.h"
 #include "linux/sched.h"
+#include "asm/smp.h"
 #include "user_util.h"
 #include "kern_util.h"
 #include "kern.h"
diff --git a/include/asm-um/smp.h b/include/asm-um/smp.h
index d879eba2b52c..aeda6657f366 100644
--- a/include/asm-um/smp.h
+++ b/include/asm-um/smp.h
@@ -23,6 +23,8 @@ extern inline void smp_cpus_done(unsigned int maxcpus)
 {
 }
 
+extern struct task_struct *idle_threads[NR_CPUS];
+
 #endif
 
 #endif