Hi Andrew,
It's probably a bug fix that unveils the link errors.
tree: git://git.cmpxchg.org/linux-mmotm.git master
head: f1560529a066beae1f8bc50a2139b796c01534f1
commit: e79fde04cef13b9356b75883ffa6e2b18a6f7530 [262/281] linux-next-rejects
config: i386-randconfig-n0-201746 (attached as .config)
compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026
reproduce:
git checkout e79fde04cef13b9356b75883ffa6e2b18a6f7530
# save the attached .config to linux build tree
make ARCH=i386
All errors (new ones prefixed by >>):
arch/x86/kernel/cpu/proc.o: In function `show_cpuinfo':
>> arch/x86/kernel/cpu/proc.c:81: undefined reference to `arch_freq_get_on_cpu'
vim +81 arch/x86/kernel/cpu/proc.c
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 54
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 55 static int show_cpuinfo(struct seq_file *m, void *v)
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 56 {
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 57 struct cpuinfo_x86 *c = v;
141168c3 arch/x86/kernel/cpu/proc.c Kevin Winchester 2011-12-20 58 unsigned int cpu;
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 59 int i;
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 60
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 61 cpu = c->cpu_index;
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 62 seq_printf(m, "processor\t: %u\n"
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 63 "vendor_id\t: %s\n"
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 64 "cpu family\t: %d\n"
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 65 "model\t\t: %u\n"
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 66 "model name\t: %s\n",
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 67 cpu,
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 68 c->x86_vendor_id[0] ? c->x86_vendor_id : "unknown",
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 69 c->x86,
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 70 c->x86_model,
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 71 c->x86_model_id[0] ? c->x86_model_id : "unknown");
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 72
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 73 if (c->x86_mask || c->cpuid_level >= 0)
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 74 seq_printf(m, "stepping\t: %d\n", c->x86_mask);
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 75 else
3736708f arch/x86/kernel/cpu/proc.c Rasmus Villemoes 2014-11-28 76 seq_puts(m, "stepping\t: unknown\n");
506ed6b5 arch/x86/kernel/cpu/proc.c Andi Kleen 2011-10-12 77 if (c->microcode)
881e23e5 arch/x86/kernel/cpu/proc.c Borislav Petkov 2011-10-17 78 seq_printf(m, "microcode\t: 0x%x\n", c->microcode);
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 79
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 80 if (cpu_has(c, X86_FEATURE_TSC)) {
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 @81 unsigned int freq = arch_freq_get_on_cpu(cpu);
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 82
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 83 if (!freq)
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 84 freq = cpufreq_quick_get(cpu);
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 85 if (!freq)
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 86 freq = cpu_khz;
a3a255e7 arch/i386/kernel/cpu/proc.c Andrew Morton 2005-06-23 87 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 88 freq / 1000, (freq % 1000));
2e3c624e arch/x86/kernel/cpu/proc.c Andrew Morton 2017-11-03 89 }
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 90
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 91 /* Cache size */
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 92 if (c->x86_cache_size >= 0)
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 93 seq_printf(m, "cache size\t: %d KB\n", c->x86_cache_size);
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 94
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 95 show_cpuinfo_core(m, c, cpu);
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 96 show_cpuinfo_misc(m, c);
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 97
3736708f arch/x86/kernel/cpu/proc.c Rasmus Villemoes 2014-11-28 98 seq_puts(m, "flags\t\t:");
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 99 for (i = 0; i < 32*NCAPINTS; i++)
a967ceac arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 100 if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 101 seq_printf(m, " %s", x86_cap_flags[i]);
^1da177e arch/i386/kernel/cpu/proc.c Linus Torvalds 2005-04-16 102
3736708f arch/x86/kernel/cpu/proc.c Rasmus Villemoes 2014-11-28 103 seq_puts(m, "\nbugs\t\t:");
80a208bd arch/x86/kernel/cpu/proc.c Borislav Petkov 2014-06-24 104 for (i = 0; i < 32*NBUGINTS; i++) {
80a208bd arch/x86/kernel/cpu/proc.c Borislav Petkov 2014-06-24 105 unsigned int bug_bit = 32*NCAPINTS + i;
80a208bd arch/x86/kernel/cpu/proc.c Borislav Petkov 2014-06-24 106
80a208bd arch/x86/kernel/cpu/proc.c Borislav Petkov 2014-06-24 107 if (cpu_has_bug(c, bug_bit) && x86_bug_flags[i])
80a208bd arch/x86/kernel/cpu/proc.c Borislav Petkov 2014-06-24 108 seq_printf(m, " %s", x86_bug_flags[i]);
80a208bd arch/x86/kernel/cpu/proc.c Borislav Petkov 2014-06-24 109 }
80a208bd arch/x86/kernel/cpu/proc.c Borislav Petkov 2014-06-24 110
f84c3a42 arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 111 seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
f84c3a42 arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 112 c->loops_per_jiffy/(500000/HZ),
f84c3a42 arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 113 (c->loops_per_jiffy/(5000/HZ)) % 100);
2aef7720 arch/x86/kernel/cpu/proc.c Hiroshi Shimamoto 2008-02-20 114
:::::: The code at line 81 was first introduced by commit
:::::: 2e3c624e3ef6e43cdad6f39b6acef65cf29920c3 origin
:::::: TO: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
:::::: CC: Johannes Weiner <hannes@xxxxxxxxxxx>
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