x86: make early_per_cpu() a lvalue and use it

Make early_per_cpu() a lvalue as per_cpu() is and use it where
applicable.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index ece7205..df644f3 100644 (file)
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -195,9 +195,9 @@ do {                                                        \
 #define        early_per_cpu_ptr(_name) (_name##_early_ptr)
 #define        early_per_cpu_map(_name, _idx) (_name##_early_map[_idx])
 #define        early_per_cpu(_name, _cpu)                              \
-       (early_per_cpu_ptr(_name) ?                             \
-               early_per_cpu_ptr(_name)[_cpu] :                \
-               per_cpu(_name, _cpu))
+       *(early_per_cpu_ptr(_name) ?                            \
+               &early_per_cpu_ptr(_name)[_cpu] :               \
+               &per_cpu(_name, _cpu))
 
 #else  /* !CONFIG_SMP */
 #define        DEFINE_EARLY_PER_CPU(_type, _name, _initvalue)          \

diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index 4e2f2e0..87ca3fd 100644 (file)
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -102,10 +102,7 @@ static inline int cpu_to_node(int cpu)
 /* Same function but used if called before per_cpu areas are setup */
 static inline int early_cpu_to_node(int cpu)
 {
-       if (early_per_cpu_ptr(x86_cpu_to_node_map))
-               return early_per_cpu_ptr(x86_cpu_to_node_map)[cpu];
-
-       return per_cpu(x86_cpu_to_node_map, cpu);
+       return early_per_cpu(x86_cpu_to_node_map, cpu);
 }
 
 /* Returns a pointer to the cpumask of CPUs on Node 'node'. */

diff --git a/arch/x86/kernel/apic.c b/arch/x86/kernel/apic.c
index 38d6aab..4857879 100644 (file)
--- a/arch/x86/kernel/apic.c
+++ b/arch/x86/kernel/apic.c
@@ -1877,17 +1877,8 @@ void __cpuinit generic_processor_info(int apicid, int version)
 #endif
 
 #if defined(CONFIG_X86_SMP) || defined(CONFIG_X86_64)
-       /* are we being called early in kernel startup? */
-       if (early_per_cpu_ptr(x86_cpu_to_apicid)) {
-               u16 *cpu_to_apicid = early_per_cpu_ptr(x86_cpu_to_apicid);
-               u16 *bios_cpu_apicid = early_per_cpu_ptr(x86_bios_cpu_apicid);
-
-               cpu_to_apicid[cpu] = apicid;
-               bios_cpu_apicid[cpu] = apicid;
-       } else {
-               per_cpu(x86_cpu_to_apicid, cpu) = apicid;
-               per_cpu(x86_bios_cpu_apicid, cpu) = apicid;
-       }
+       early_per_cpu(x86_cpu_to_apicid, cpu) = apicid;
+       early_per_cpu(x86_bios_cpu_apicid, cpu) = apicid;
 #endif
 
        set_cpu_possible(cpu, true);