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authorKevin Winchester <kjwinchester@gmail.com>2011-12-20 20:52:22 -0400
committerIngo Molnar <mingo@elte.hu>2011-12-21 09:25:09 +0100
commit141168c36cdee3ff23d9c7700b0edc47cb65479f (patch)
tree9b307514252062a7bd0cfa593e56e1843975e1c2 /arch/x86
parentb49d7d877ff96428c8cd2076b33ba72bf85ceaba (diff)
x86: Simplify code by removing a !SMP #ifdefs from 'struct cpuinfo_x86'
Several fields in struct cpuinfo_x86 were not defined for the !SMP case, likely to save space. However, those fields still have some meaning for UP, and keeping them allows some #ifdef removal from other files. The additional size of the UP kernel from this change is not significant enough to worry about keeping up the distinction: text data bss dec hex filename 4737168 506459 972040 6215667 5ed7f3 vmlinux.o.before 4737444 506459 972040 6215943 5ed907 vmlinux.o.after for a difference of 276 bytes for an example UP config. If someone wants those 276 bytes back badly then it should be implemented in a cleaner way. Signed-off-by: Kevin Winchester <kjwinchester@gmail.com> Cc: Steffen Persvold <sp@numascale.com> Link: http://lkml.kernel.org/r/1324428742-12498-1-git-send-email-kjwinchester@gmail.com Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/processor.h2
-rw-r--r--arch/x86/kernel/amd_nb.c8
-rw-r--r--arch/x86/kernel/cpu/amd.c2
-rw-r--r--arch/x86/kernel/cpu/common.c7
-rw-r--r--arch/x86/kernel/cpu/intel.c2
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c2
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce_amd.c7
-rw-r--r--arch/x86/kernel/cpu/proc.c4
8 files changed, 4 insertions, 30 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h
index b650435ffb5..aa9088c2693 100644
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -99,7 +99,6 @@ struct cpuinfo_x86 {
u16 apicid;
u16 initial_apicid;
u16 x86_clflush_size;
-#ifdef CONFIG_SMP
/* number of cores as seen by the OS: */
u16 booted_cores;
/* Physical processor id: */
@@ -110,7 +109,6 @@ struct cpuinfo_x86 {
u8 compute_unit_id;
/* Index into per_cpu list: */
u16 cpu_index;
-#endif
u32 microcode;
} __attribute__((__aligned__(SMP_CACHE_BYTES)));
diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
index 4c39baa8fac..013c1810ce7 100644
--- a/arch/x86/kernel/amd_nb.c
+++ b/arch/x86/kernel/amd_nb.c
@@ -123,16 +123,14 @@ int amd_get_subcaches(int cpu)
{
struct pci_dev *link = node_to_amd_nb(amd_get_nb_id(cpu))->link;
unsigned int mask;
- int cuid = 0;
+ int cuid;
if (!amd_nb_has_feature(AMD_NB_L3_PARTITIONING))
return 0;
pci_read_config_dword(link, 0x1d4, &mask);
-#ifdef CONFIG_SMP
cuid = cpu_data(cpu).compute_unit_id;
-#endif
return (mask >> (4 * cuid)) & 0xf;
}
@@ -141,7 +139,7 @@ int amd_set_subcaches(int cpu, int mask)
static unsigned int reset, ban;
struct amd_northbridge *nb = node_to_amd_nb(amd_get_nb_id(cpu));
unsigned int reg;
- int cuid = 0;
+ int cuid;
if (!amd_nb_has_feature(AMD_NB_L3_PARTITIONING) || mask > 0xf)
return -EINVAL;
@@ -159,9 +157,7 @@ int amd_set_subcaches(int cpu, int mask)
pci_write_config_dword(nb->misc, 0x1b8, reg & ~0x180000);
}
-#ifdef CONFIG_SMP
cuid = cpu_data(cpu).compute_unit_id;
-#endif
mask <<= 4 * cuid;
mask |= (0xf ^ (1 << cuid)) << 26;
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index ef21bdccd67..f4773f4aae3 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -148,7 +148,6 @@ static void __cpuinit init_amd_k6(struct cpuinfo_x86 *c)
static void __cpuinit amd_k7_smp_check(struct cpuinfo_x86 *c)
{
-#ifdef CONFIG_SMP
/* calling is from identify_secondary_cpu() ? */
if (!c->cpu_index)
return;
@@ -192,7 +191,6 @@ static void __cpuinit amd_k7_smp_check(struct cpuinfo_x86 *c)
valid_k7:
;
-#endif
}
static void __cpuinit init_amd_k7(struct cpuinfo_x86 *c)
diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c
index a70bd5b96b9..850f2963a42 100644
--- a/arch/x86/kernel/cpu/common.c
+++ b/arch/x86/kernel/cpu/common.c
@@ -676,9 +676,7 @@ static void __init early_identify_cpu(struct cpuinfo_x86 *c)
if (this_cpu->c_early_init)
this_cpu->c_early_init(c);
-#ifdef CONFIG_SMP
c->cpu_index = 0;
-#endif
filter_cpuid_features(c, false);
setup_smep(c);
@@ -764,10 +762,7 @@ static void __cpuinit generic_identify(struct cpuinfo_x86 *c)
c->apicid = c->initial_apicid;
# endif
#endif
-
-#ifdef CONFIG_X86_HT
c->phys_proc_id = c->initial_apicid;
-#endif
}
setup_smep(c);
@@ -1146,9 +1141,7 @@ static void dbg_restore_debug_regs(void)
*/
void __cpuinit x86_default_fixup_cpu_id(struct cpuinfo_x86 *c, int node)
{
-#ifdef CONFIG_NUMA
pr_err("NUMA core number %d differs from configured core number %d\n", node, c->phys_proc_id);
-#endif
}
/*
diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
index 523131213f0..3e6ff6cbf42 100644
--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c
@@ -181,7 +181,6 @@ static void __cpuinit trap_init_f00f_bug(void)
static void __cpuinit intel_smp_check(struct cpuinfo_x86 *c)
{
-#ifdef CONFIG_SMP
/* calling is from identify_secondary_cpu() ? */
if (!c->cpu_index)
return;
@@ -198,7 +197,6 @@ static void __cpuinit intel_smp_check(struct cpuinfo_x86 *c)
WARN_ONCE(1, "WARNING: SMP operation may be unreliable"
"with B stepping processors.\n");
}
-#endif
}
static void __cpuinit intel_workarounds(struct cpuinfo_x86 *c)
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 2af127d4c3d..e9c9d0aab36 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -119,9 +119,7 @@ void mce_setup(struct mce *m)
m->time = get_seconds();
m->cpuvendor = boot_cpu_data.x86_vendor;
m->cpuid = cpuid_eax(1);
-#ifdef CONFIG_SMP
m->socketid = cpu_data(m->extcpu).phys_proc_id;
-#endif
m->apicid = cpu_data(m->extcpu).initial_apicid;
rdmsrl(MSR_IA32_MCG_CAP, m->mcgcap);
}
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index f5474218cff..1d76872b6a4 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -64,11 +64,9 @@ struct threshold_bank {
};
static DEFINE_PER_CPU(struct threshold_bank * [NR_BANKS], threshold_banks);
-#ifdef CONFIG_SMP
static unsigned char shared_bank[NR_BANKS] = {
0, 0, 0, 0, 1
};
-#endif
static DEFINE_PER_CPU(unsigned char, bank_map); /* see which banks are on */
@@ -202,10 +200,9 @@ void mce_amd_feature_init(struct cpuinfo_x86 *c)
if (!block)
per_cpu(bank_map, cpu) |= (1 << bank);
-#ifdef CONFIG_SMP
if (shared_bank[bank] && c->cpu_core_id)
break;
-#endif
+
offset = setup_APIC_mce(offset,
(high & MASK_LVTOFF_HI) >> 20);
@@ -531,7 +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));
@@ -558,7 +554,6 @@ 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/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
index 14b23140e81..8022c668148 100644
--- a/arch/x86/kernel/cpu/proc.c
+++ b/arch/x86/kernel/cpu/proc.c
@@ -64,12 +64,10 @@ static void show_cpuinfo_misc(struct seq_file *m, struct cpuinfo_x86 *c)
static int show_cpuinfo(struct seq_file *m, void *v)
{
struct cpuinfo_x86 *c = v;
- unsigned int cpu = 0;
+ unsigned int cpu;
int i;
-#ifdef CONFIG_SMP
cpu = c->cpu_index;
-#endif
seq_printf(m, "processor\t: %u\n"
"vendor_id\t: %s\n"
"cpu family\t: %d\n"