cpumask: let num_*_cpus() function always return unsigned values

Dependent on CONFIG_SMP the num_*_cpus() functions return unsigned or
signed values.  Let them always return unsigned values to avoid strange
casts.

Fixes at least one warning:

 kernel/kprobes.c: In function 'register_kretprobe':
 kernel/kprobes.c:1038: warning: comparison of distinct pointer types lacks a cast

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/cpumask.h b/include/linux/cpumask.h
index dbcee76..bae6fe2 100644 (file)
--- a/include/linux/cpumask.h
+++ b/include/linux/cpumask.h
@@ -90,10 +90,10 @@ extern const struct cpumask *const cpu_active_mask;
 #define cpu_present(cpu)       cpumask_test_cpu((cpu), cpu_present_mask)
 #define cpu_active(cpu)                cpumask_test_cpu((cpu), cpu_active_mask)
 #else
-#define num_online_cpus()      1
-#define num_possible_cpus()    1
-#define num_present_cpus()     1
-#define num_active_cpus()      1
+#define num_online_cpus()      1U
+#define num_possible_cpus()    1U
+#define num_present_cpus()     1U
+#define num_active_cpus()      1U
 #define cpu_online(cpu)                ((cpu) == 0)
 #define cpu_possible(cpu)      ((cpu) == 0)
 #define cpu_present(cpu)       ((cpu) == 0)