percpu: make percpu symbols in ia64 unique

This patch updates percpu related symbols in ia64 such that percpu
symbols are unique and don't clash with local symbols.  This serves
two purposes of decreasing the possibility of global percpu symbol
collision and allowing dropping per_cpu__ prefix from percpu symbols.

* arch/ia64/kernel/setup.c: s/cpu_info/ia64_cpu_info/

Partly based on Rusty Russell's "alloc_percpu: rename percpu vars
which cause name clashes" patch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org

arch/ia64/include/asm/processor.h

@@ -229,16 +229,16 @@ struct cpuinfo_ia64 {
 #endif
 };
 
-DECLARE_PER_CPU(struct cpuinfo_ia64, cpu_info);
+DECLARE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
 
 /*
  * The "local" data variable.  It refers to the per-CPU data of the currently executing
  * CPU, much like "current" points to the per-task data of the currently executing task.
  * Do not use the address of local_cpu_data, since it will be different from
  * cpu_data(smp_processor_id())!
  */
-#define local_cpu_data		(&__ia64_per_cpu_var(cpu_info))
-#define cpu_data(cpu)		(&per_cpu(cpu_info, cpu))
+#define local_cpu_data		(&__ia64_per_cpu_var(ia64_cpu_info))
+#define cpu_data(cpu)		(&per_cpu(ia64_cpu_info, cpu))
 
 extern void print_cpu_info (struct cpuinfo_ia64 *);
 

arch/ia64/kernel/head.S

@@ -1051,7 +1051,7 @@ END(ia64_delay_loop)
  * intermediate precision so that we can produce a full 64-bit result.
  */
 GLOBAL_ENTRY(ia64_native_sched_clock)
-	addl r8=THIS_CPU(cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
+	addl r8=THIS_CPU(ia64_cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
 	mov.m r9=ar.itc		// fetch cycle-counter				(35 cyc)
 	;;
 	ldf8 f8=[r8]
@@ -1077,7 +1077,7 @@ sched_clock = ia64_native_sched_clock
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING
 GLOBAL_ENTRY(cycle_to_cputime)
 	alloc r16=ar.pfs,1,0,0,0
-	addl r8=THIS_CPU(cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
+	addl r8=THIS_CPU(ia64_cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
 	;;
 	ldf8 f8=[r8]
 	;;

arch/ia64/kernel/ia64_ksyms.c

@@ -30,7 +30,7 @@ EXPORT_SYMBOL(max_low_pfn);	/* defined by bootmem.c, but not exported by generic
 #endif
 
 #include <asm/processor.h>
-EXPORT_SYMBOL(per_cpu__cpu_info);
+EXPORT_SYMBOL(per_cpu__ia64_cpu_info);
 #ifdef CONFIG_SMP
 EXPORT_SYMBOL(per_cpu__local_per_cpu_offset);
 #endif

arch/ia64/kernel/mca_asm.S

@@ -59,7 +59,7 @@
 ia64_do_tlb_purge:
 #define O(member)	IA64_CPUINFO_##member##_OFFSET
 
-	GET_THIS_PADDR(r2, cpu_info)	// load phys addr of cpu_info into r2
+	GET_THIS_PADDR(r2, ia64_cpu_info) // load phys addr of cpu_info into r2
 	;;
 	addl r17=O(PTCE_STRIDE),r2
 	addl r2=O(PTCE_BASE),r2

arch/ia64/kernel/relocate_kernel.S

@@ -61,7 +61,7 @@ GLOBAL_ENTRY(relocate_new_kernel)
 
 	// purge all TC entries
 #define O(member)       IA64_CPUINFO_##member##_OFFSET
-        GET_THIS_PADDR(r2, cpu_info)    // load phys addr of cpu_info into r2
+        GET_THIS_PADDR(r2, ia64_cpu_info) // load phys addr of cpu_info into r2
         ;;
         addl r17=O(PTCE_STRIDE),r2
         addl r2=O(PTCE_BASE),r2

arch/ia64/kernel/setup.c

@@ -74,7 +74,7 @@ unsigned long __per_cpu_offset[NR_CPUS];
 EXPORT_SYMBOL(__per_cpu_offset);
 #endif
 
-DEFINE_PER_CPU(struct cpuinfo_ia64, cpu_info);
+DEFINE_PER_CPU(struct cpuinfo_ia64, ia64_cpu_info);
 DEFINE_PER_CPU(unsigned long, local_per_cpu_offset);
 unsigned long ia64_cycles_per_usec;
 struct ia64_boot_param *ia64_boot_param;
@@ -967,7 +967,7 @@ cpu_init (void)
 	 * depends on the data returned by identify_cpu().  We break the dependency by
 	 * accessing cpu_data() through the canonical per-CPU address.
 	 */
-	cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(cpu_info) - __per_cpu_start);
+	cpu_info = cpu_data + ((char *) &__ia64_per_cpu_var(ia64_cpu_info) - __per_cpu_start);
 	identify_cpu(cpu_info);
 
 #ifdef CONFIG_MCKINLEY

arch/ia64/mm/discontig.c

@@ -450,15 +450,16 @@ static void __init initialize_pernode_data(void)
 	/* Set the node_data pointer for each per-cpu struct */
 	for_each_possible_early_cpu(cpu) {
 		node = node_cpuid[cpu].nid;
-		per_cpu(cpu_info, cpu).node_data = mem_data[node].node_data;
+		per_cpu(ia64_cpu_info, cpu).node_data =
+			mem_data[node].node_data;
 	}
 #else
 	{
 		struct cpuinfo_ia64 *cpu0_cpu_info;
 		cpu = 0;
 		node = node_cpuid[cpu].nid;
 		cpu0_cpu_info = (struct cpuinfo_ia64 *)(__phys_per_cpu_start +
-			((char *)&per_cpu__cpu_info - __per_cpu_start));
+			((char *)&per_cpu__ia64_cpu_info - __per_cpu_start));
 		cpu0_cpu_info->node_data = mem_data[node].node_data;
 	}
 #endif /* CONFIG_SMP */

arch/ia64/sn/kernel/sn2/sn2_smp.c

@@ -496,13 +496,13 @@ static int sn2_ptc_seq_show(struct seq_file *file, void *data)
 		seq_printf(file, "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld\n", cpu, stat->ptc_l,
 				stat->change_rid, stat->shub_ptc_flushes, stat->nodes_flushed,
 				stat->deadlocks,
-				1000 * stat->lock_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
-				1000 * stat->shub_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec,
-				1000 * stat->shub_itc_clocks_max / per_cpu(cpu_info, cpu).cyc_per_usec,
+				1000 * stat->lock_itc_clocks / per_cpu(ia64_cpu_info, cpu).cyc_per_usec,
+				1000 * stat->shub_itc_clocks / per_cpu(ia64_cpu_info, cpu).cyc_per_usec,
+				1000 * stat->shub_itc_clocks_max / per_cpu(ia64_cpu_info, cpu).cyc_per_usec,
 				stat->shub_ptc_flushes_not_my_mm,
 				stat->deadlocks2,
 				stat->shub_ipi_flushes,
-				1000 * stat->shub_ipi_flushes_itc_clocks / per_cpu(cpu_info, cpu).cyc_per_usec);
+				1000 * stat->shub_ipi_flushes_itc_clocks / per_cpu(ia64_cpu_info, cpu).cyc_per_usec);
 	}
 	return 0;
 }