cpumask: CONFIG_BITS_ALL, CONFIG_BITS_NONE and CONFIG_BITS_CPU0

Since we're now preferring raw bitmaps for (eventually rare) static
cpumasks, we

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 include/linux/cpumask.h |   42 +++++++++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 19 deletions(-)

diff -r 95e91af9255d include/linux/cpumask.h
--- a/include/linux/cpumask.h	Mon Oct 06 08:29:06 2008 +1100
+++ b/include/linux/cpumask.h	Mon Oct 06 08:40:41 2008 +1100
@@ -55,8 +55,9 @@
  *
  * size_t cpumask_size()		Length of cpumask in bytes.
  * const struct cpumask *cpumask_of(cpu) Return cpumask with bit 'cpu' set
- * CPU_MASK_ALL				Initializer - all bits set
- * CPU_MASK_NONE			Initializer - no bits set
+ * CPU_BITS_ALL				Initializer - all bits set
+ * CPU_BITS_NONE			Initializer - no bits set
+ * CPU_BITS_CPU0			Initializer - first bit set
  * unsigned long *cpumask_bits(mask)	Array of unsigned long's in mask
  *
  * struct cpumask *to_cpumask(const unsigned long[])
@@ -117,6 +118,9 @@ typedef struct cpumask cpumask_t;
 typedef struct cpumask cpumask_t;
 extern cpumask_t _unused_cpumask_arg_;
 
+#define CPU_MASK_ALL		((cpumask_t){ CPU_BITS_ALL })
+#define CPU_MASK_NONE		((cpumask_t){ CPU_BITS_NONE })
+#define CPU_MASK_CPU0		((cpumask_t){ CPU_BITS_CPU0 })
 #define cpu_set(cpu, dst) cpumask_set_cpu((cpu), &(dst))
 #define cpu_clear(cpu, dst) cpumask_clear_cpu((cpu), &(dst))
 #define cpu_test_and_set(cpu, mask) cpumask_test_and_set_cpu((cpu), &(mask))
@@ -388,20 +392,20 @@ static inline const struct cpumask *cpum
 
 #if NR_CPUS <= BITS_PER_LONG
 
-#define CPU_MASK_ALL							\
-(cpumask_t) { {								\
-	[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD			\
-} }
+#define CPU_BITS_ALL						\
+{								\
+	[BITS_TO_LONGS(CONFIG_NR_CPUS)-1] = CPU_MASK_LAST_WORD	\
+}
 
 #define CPU_MASK_ALL_PTR	(&CPU_MASK_ALL)
 
 #else
 
-#define CPU_MASK_ALL							\
-(cpumask_t) { {								\
-	[0 ... BITS_TO_LONGS(NR_CPUS)-2] = ~0UL,			\
-	[BITS_TO_LONGS(NR_CPUS)-1] = CPU_MASK_LAST_WORD			\
-} }
+#define CPU_BITS_ALL						\
+{								\
+	[0 ... BITS_TO_LONGS(CONFIG_NR_CPUS)-2] = ~0UL,		\
+	[BITS_TO_LONGS(CONFIG_NR_CPUS)-1] = CPU_MASK_LAST_WORD	\
+}
 
 /* cpu_mask_all is in init/main.c */
 extern cpumask_t cpu_mask_all;
@@ -409,15 +413,15 @@ extern cpumask_t cpu_mask_all;
 
 #endif
 
-#define CPU_MASK_NONE							\
-(cpumask_t) { {								\
-	[0 ... BITS_TO_LONGS(NR_CPUS)-1] =  0UL				\
-} }
+#define CPU_BITS_NONE						\
+{								\
+	[0 ... BITS_TO_LONGS(CONFIG_NR_CPUS)-1] = 0UL		\
+}
 
-#define CPU_MASK_CPU0							\
-(cpumask_t) { {								\
-	[0] =  1UL							\
-} }
+#define CPU_BITS_CPU0						\
+{								\
+	[0] =  1UL						\
+}
 
 #if NR_CPUS == 1