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WSL2-Linux-Kernel
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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>
This commit is contained in:
Kevin Winchester 2011-12-20 20:52:22 -04:00 коммит произвёл Ingo Molnar
Родитель b49d7d877f
Коммит 141168c36c
10 изменённых файлов: 7 добавлений и 36 удалений
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2
arch/x86/include/asm/processor.h
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@ -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)));

8
arch/x86/kernel/amd_nb.c
Просмотреть файл

@ -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;

2
arch/x86/kernel/cpu/amd.c
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@ -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)

7
arch/x86/kernel/cpu/common.c
Просмотреть файл

@ -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
}
/*

2
arch/x86/kernel/cpu/intel.c
Просмотреть файл

@ -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)

2
arch/x86/kernel/cpu/mcheck/mce.c
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@ -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);
}

7
arch/x86/kernel/cpu/mcheck/mce_amd.c
Просмотреть файл

@ -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) {

4
arch/x86/kernel/cpu/proc.c
Просмотреть файл

@ -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"

2
drivers/edac/sb_edac.c
Просмотреть файл

@ -1609,11 +1609,9 @@ static int sbridge_mce_check_error(struct notifier_block *nb, unsigned long val,
mce->cpuvendor, mce->cpuid, mce->time,
mce->socketid, mce->apicid);
#ifdef CONFIG_SMP
/* Only handle if it is the right mc controller */
if (cpu_data(mce->cpu).phys_proc_id != pvt->sbridge_dev->mc)
return NOTIFY_DONE;
#endif
smp_rmb();
if ((pvt->mce_out + 1) % MCE_LOG_LEN == pvt->mce_in) {

7
drivers/hwmon/coretemp.c
Просмотреть файл

@ -57,16 +57,15 @@ MODULE_PARM_DESC(tjmax, "TjMax value in degrees Celsius");
#define TOTAL_ATTRS (MAX_CORE_ATTRS + 1)
#define MAX_CORE_DATA (NUM_REAL_CORES + BASE_SYSFS_ATTR_NO)
#ifdef CONFIG_SMP
#define TO_PHYS_ID(cpu) cpu_data(cpu).phys_proc_id
#define TO_CORE_ID(cpu) cpu_data(cpu).cpu_core_id
#define TO_ATTR_NO(cpu) (TO_CORE_ID(cpu) + BASE_SYSFS_ATTR_NO)
#ifdef CONFIG_SMP
#define for_each_sibling(i, cpu) for_each_cpu(i, cpu_sibling_mask(cpu))
#else
#define TO_PHYS_ID(cpu) (cpu)
#define TO_CORE_ID(cpu) (cpu)
#define for_each_sibling(i, cpu) for (i = 0; false; )
#endif
#define TO_ATTR_NO(cpu) (TO_CORE_ID(cpu) + BASE_SYSFS_ATTR_NO)
/*
* Per-Core Temperature Data