powerpc: Move cpu_has_feature() to a separate file

We plan to use jump label for cpu_has_feature(). In order to implement
this we need to include the linux/jump_label.h in asm/cputable.h.

Unfortunately if we do that it leads to an include loop. The root of the
problem seems to be that reg.h needs cputable.h (for CPU_FTRs), and then
cputable.h via jump_label.h eventually pulls in hw_irq.h which needs
reg.h (for MSR_EE).

So move cpu_has_feature() to a separate file on its own.

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[mpe: Rename to cpu_has_feature.h and flesh out change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/include/asm/book3s/64/mmu-hash.h

@@ -24,6 +24,7 @@
 #include <asm/book3s/64/pgtable.h>
 #include <asm/bug.h>
 #include <asm/processor.h>
+#include <asm/cpu_has_feature.h>
 
 /*
  * SLB

arch/powerpc/include/asm/cacheflush.h

@@ -11,6 +11,7 @@
 
 #include <linux/mm.h>
 #include <asm/cputable.h>
+#include <asm/cpu_has_feature.h>
 
 /*
  * No cache flushing is required when address mappings are changed,

arch/powerpc/include/asm/cpu_has_feature.h

@@ -0,0 +1,20 @@
+#ifndef __ASM_POWERPC_CPUFEATURES_H
+#define __ASM_POWERPC_CPUFEATURES_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/cputable.h>
+
+static inline bool early_cpu_has_feature(unsigned long feature)
+{
+	return !!((CPU_FTRS_ALWAYS & feature) ||
+		  (CPU_FTRS_POSSIBLE & cur_cpu_spec->cpu_features & feature));
+}
+
+static inline bool cpu_has_feature(unsigned long feature)
+{
+	return early_cpu_has_feature(feature);
+}
+
+#endif /* __ASSEMBLY__ */
+#endif /* __ASM_POWERPC_CPUFEATURE_H */

arch/powerpc/include/asm/cputable.h

@@ -577,17 +577,6 @@ enum {
 };
 #endif /* __powerpc64__ */
 
-static inline bool early_cpu_has_feature(unsigned long feature)
-{
-	return !!((CPU_FTRS_ALWAYS & feature) ||
-		  (CPU_FTRS_POSSIBLE & cur_cpu_spec->cpu_features & feature));
-}
-
-static inline bool cpu_has_feature(unsigned long feature)
-{
-	return early_cpu_has_feature(feature);
-}
-
 #define HBP_NUM 1
 
 #endif /* !__ASSEMBLY__ */

arch/powerpc/include/asm/cputime.h

@@ -28,6 +28,7 @@ static inline void setup_cputime_one_jiffy(void) { }
 #include <asm/div64.h>
 #include <asm/time.h>
 #include <asm/param.h>
+#include <asm/cpu_has_feature.h>
 
 typedef u64 __nocast cputime_t;
 typedef u64 __nocast cputime64_t;

arch/powerpc/include/asm/dbell.h

@@ -16,6 +16,7 @@
 #include <linux/threads.h>
 
 #include <asm/ppc-opcode.h>
+#include <asm/cpu_has_feature.h>
 
 #define PPC_DBELL_MSG_BRDCAST	(0x04000000)
 #define PPC_DBELL_TYPE(x)	(((x) & 0xf) << (63-36))

arch/powerpc/include/asm/dcr-native.h

@@ -24,6 +24,7 @@
 
 #include <linux/spinlock.h>
 #include <asm/cputable.h>
+#include <asm/cpu_has_feature.h>
 
 typedef struct {
 	unsigned int base;

arch/powerpc/include/asm/mman.h

@@ -13,6 +13,7 @@
 
 #include <asm/cputable.h>
 #include <linux/mm.h>
+#include <asm/cpu_has_feature.h>
 
 /*
  * This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()

arch/powerpc/include/asm/time.h

@@ -18,6 +18,7 @@
 #include <linux/percpu.h>
 
 #include <asm/processor.h>
+#include <asm/cpu_has_feature.h>
 
 /* time.c */
 extern unsigned long tb_ticks_per_jiffy;

arch/powerpc/include/asm/xor.h

@@ -23,6 +23,7 @@
 #ifdef CONFIG_ALTIVEC
 
 #include <asm/cputable.h>
+#include <asm/cpu_has_feature.h>
 
 void xor_altivec_2(unsigned long bytes, unsigned long *v1_in,
 		   unsigned long *v2_in);

arch/powerpc/kernel/align.c

@@ -26,6 +26,7 @@
 #include <asm/emulated_ops.h>
 #include <asm/switch_to.h>
 #include <asm/disassemble.h>
+#include <asm/cpu_has_feature.h>
 
 struct aligninfo {
 	unsigned char len;

arch/powerpc/kernel/irq.c

@@ -75,6 +75,7 @@
 #endif
 #define CREATE_TRACE_POINTS
 #include <asm/trace.h>
+#include <asm/cpu_has_feature.h>
 
 DEFINE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
 EXPORT_PER_CPU_SYMBOL(irq_stat);

arch/powerpc/kernel/process.c

@@ -58,6 +58,7 @@
 #include <asm/code-patching.h>
 #include <asm/exec.h>
 #include <asm/livepatch.h>
+#include <asm/cpu_has_feature.h>
 
 #include <linux/kprobes.h>
 #include <linux/kdebug.h>

arch/powerpc/kernel/setup-common.c

@@ -66,6 +66,7 @@
 #include <asm/hugetlb.h>
 #include <asm/livepatch.h>
 #include <asm/mmu_context.h>
+#include <asm/cpu_has_feature.h>
 
 #include "setup.h"
 

arch/powerpc/kernel/setup_32.c

@@ -37,6 +37,7 @@
 #include <asm/serial.h>
 #include <asm/udbg.h>
 #include <asm/code-patching.h>
+#include <asm/cpu_has_feature.h>
 
 #define DBG(fmt...)
 

arch/powerpc/kernel/smp.c

@@ -55,6 +55,7 @@
 #include <asm/debug.h>
 #include <asm/kexec.h>
 #include <asm/asm-prototypes.h>
+#include <asm/cpu_has_feature.h>
 
 #ifdef DEBUG
 #include <asm/udbg.h>

arch/powerpc/platforms/cell/pervasive.c

@@ -35,6 +35,7 @@
 #include <asm/pgtable.h>
 #include <asm/reg.h>
 #include <asm/cell-regs.h>
+#include <asm/cpu_has_feature.h>
 
 #include "pervasive.h"
 

arch/powerpc/xmon/ppc-dis.c

@@ -20,6 +20,7 @@ along with this file; see the file COPYING.  If not, write to the Free
 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
 
 #include <asm/cputable.h>
+#include <asm/cpu_has_feature.h>
 #include "nonstdio.h"
 #include "ansidecl.h"
 #include "ppc.h"