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Subject[PATCH v6 1/5] x86: Move per cpu cpu_llc_shared_map to a field in struct cpuinfo_x86
Date
Commit 141168c36cde ("x86: Simplify code by removing a !SMP #ifdefs from
'struct cpuinfo_x86'") caused the compilation error:

mce_amd.c:(.cpuinit.text+0x4723): undefined reference to 'cpu_llc_shared_map'

by removing an #ifdef CONFIG_SMP around a block containing a reference
to cpu_llc_shared_map. Rather than replace the #ifdef, move
cpu_llc_shared_map to be a new cpumask_t field llc_shared_map in
struct cpuinfo_x86 and adjust all references to cpu_llc_shared_map.

Signed-off-by: Kevin Winchester <kjwinchester@gmail.com>
---
arch/x86/include/asm/processor.h | 2 ++
arch/x86/include/asm/smp.h | 4 +---
arch/x86/kernel/cpu/mcheck/mce_amd.c | 2 --
arch/x86/kernel/smpboot.c | 3 ---
arch/x86/xen/smp.c | 1 -
5 files changed, 3 insertions(+), 9 deletions(-)
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index 4fa7dcc..c92ac6e 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -119,6 +119,8 @@ struct cpuinfo_x86 {
/* Index into per_cpu list: */
u16 cpu_index;
u32 microcode;
+ /* CPUs sharing the last level cache: */
+ cpumask_t llc_shared_map;
} __attribute__((__aligned__(SMP_CACHE_BYTES)));

#define X86_VENDOR_INTEL 0
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index 0434c40..b6e034e 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -33,8 +33,6 @@ static inline bool cpu_has_ht_siblings(void)

DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
-/* cpus sharing the last level cache: */
-DECLARE_PER_CPU(cpumask_var_t, cpu_llc_shared_map);
DECLARE_PER_CPU(u16, cpu_llc_id);
DECLARE_PER_CPU(int, cpu_number);

@@ -50,7 +48,7 @@ static inline struct cpumask *cpu_core_mask(int cpu)

static inline struct cpumask *cpu_llc_shared_mask(int cpu)
{
- return per_cpu(cpu_llc_shared_map, cpu);
+ return &cpu_data(cpu).llc_shared_map;
}

DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 99b5717..a4bf9d2 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -528,7 +528,6 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)

sprintf(name, "threshold_bank%i", bank);

-#ifdef CONFIG_SMP
if (cpu_data(cpu).cpu_core_id && shared_bank[bank]) { /* symlink */
i = cpumask_first(cpu_llc_shared_mask(cpu));

@@ -554,7 +553,6 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)

goto out;
}
-#endif

b = kzalloc(sizeof(struct threshold_bank), GFP_KERNEL);
if (!b) {
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 6e1e406..589bf69 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -128,8 +128,6 @@ EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
DEFINE_PER_CPU(cpumask_var_t, cpu_core_map);
EXPORT_PER_CPU_SYMBOL(cpu_core_map);

-DEFINE_PER_CPU(cpumask_var_t, cpu_llc_shared_map);
-
/* Per CPU bogomips and other parameters */
DEFINE_PER_CPU_SHARED_ALIGNED(struct cpuinfo_x86, cpu_info);
EXPORT_PER_CPU_SYMBOL(cpu_info);
@@ -1036,7 +1034,6 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
for_each_possible_cpu(i) {
zalloc_cpumask_var(&per_cpu(cpu_sibling_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL);
- zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
}
set_cpu_sibling_map(0);

diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 0503c0c..7f336a9 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -246,7 +246,6 @@ static void __init xen_smp_prepare_cpus(unsigned int max_cpus)
for_each_possible_cpu(i) {
zalloc_cpumask_var(&per_cpu(cpu_sibling_map, i), GFP_KERNEL);
zalloc_cpumask_var(&per_cpu(cpu_core_map, i), GFP_KERNEL);
- zalloc_cpumask_var(&per_cpu(cpu_llc_shared_map, i), GFP_KERNEL);
}
set_cpu_sibling_map(0);

--
1.7.10


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