7:11 p.m.
Hi Baoquan,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/lee/linux.git
android-3.18-preview
head: 8c4eb268823e5844582318d81cd4ae69b69f5704
commit: 39972bcf660a4a878675bc794f07a860eb4de0c3 [389/772] x86/apic: Set up
through-local-APIC mode on the boot CPU if 'noapic' specified
config: i386-randconfig-a014-20210322 (attached as .config)
compiler: gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010
reproduce (this is a W=1 build):
#
https://git.kernel.org/pub/scm/linux/kernel/git/lee/linux.git/commit/?id=...
git remote add lee-korg
https://git.kernel.org/pub/scm/linux/kernel/git/lee/linux.git
git fetch --no-tags lee-korg android-3.18-preview
git checkout 39972bcf660a4a878675bc794f07a860eb4de0c3
# save the attached .config to linux build tree
make W=1 ARCH=i386
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All errors (new ones prefixed by >>):
In file included from arch/x86/include/asm/pgalloc.h:6:0,
from arch/x86/kernel/apic/apic.c:42:
include/linux/pagemap.h: In function 'fault_in_multipages_readable':
include/linux/pagemap.h:633:16: warning: variable 'c' set but not used
[-Wunused-but-set-variable]
volatile char c;
^
arch/x86/kernel/apic/apic.c: At top level:
arch/x86/kernel/apic/apic.c:957:28: warning: no previous prototype for
'smp_trace_apic_timer_interrupt' [-Wmissing-prototypes]
__visible void __irq_entry smp_trace_apic_timer_interrupt(struct pt_regs *regs)
^
arch/x86/kernel/apic/apic.c: In function 'setup_local_APIC':
> arch/x86/kernel/apic/apic.c:1471:37: error:
'skip_ioapic_setup' undeclared (first use in this function)
if (!cpu
&& (pic_mode || !value || skip_ioapic_setup)) {
^
arch/x86/kernel/apic/apic.c:1471:37: note: each undeclared identifier is reported only
once for each function it appears in
arch/x86/kernel/apic/apic.c: At top level:
arch/x86/kernel/apic/apic.c:1595:12: warning: no previous prototype for
'enable_IR' [-Wmissing-prototypes]
int __init enable_IR(void)
^
arch/x86/kernel/apic/apic.c: In function 'enable_IR_x2apic':
arch/x86/kernel/apic/apic.c:1617:11: warning: variable 'x2apic_enabled' set but
not used [-Wunused-but-set-variable]
int ret, x2apic_enabled = 0;
^
arch/x86/kernel/apic/apic.c: In function 'apic_verify':
arch/x86/kernel/apic/apic.c:1706:16: warning: variable 'h' set but not used
[-Wunused-but-set-variable]
u32 features, h, l;
^
arch/x86/kernel/apic/apic.c: At top level:
arch/x86/kernel/apic/apic.c:1980:16: warning: no previous prototype for
'smp_trace_spurious_interrupt' [-Wmissing-prototypes]
__visible void smp_trace_spurious_interrupt(struct pt_regs *regs)
^
arch/x86/kernel/apic/apic.c:2036:16: warning: no previous prototype for
'smp_trace_error_interrupt' [-Wmissing-prototypes]
__visible void smp_trace_error_interrupt(struct pt_regs *regs)
^
arch/x86/kernel/apic/apic.c: In function 'generic_processor_info':
arch/x86/kernel/apic/apic.c:2174:43: warning: comparison of unsigned expression >= 0
is always true [-Wtype-limits]
if (!boot_cpu_detected && num_processors >= nr_cpu_ids - 1 &&
^
vim +/skip_ioapic_setup +1471 arch/x86/kernel/apic/apic.c
1453
1454 /*
1455 * Set spurious IRQ vector
1456 */
1457 value |= SPURIOUS_APIC_VECTOR;
1458 apic_write(APIC_SPIV, value);
1459
1460 /*
1461 * Set up LVT0, LVT1:
1462 *
1463 * set up through-local-APIC on the BP's LINT0. This is not
1464 * strictly necessary in pure symmetric-IO mode, but sometimes
1465 * we delegate interrupts to the 8259A.
1466 */
1467 /*
1468 * TODO: set up through-local-APIC from through-I/O-APIC? --macro
1469 */
1470 value = apic_read(APIC_LVT0) & APIC_LVT_MASKED;
1471 if (!cpu && (pic_mode || !value || skip_ioapic_setup))
{
1472 value = APIC_DM_EXTINT;
1473 apic_printk(APIC_VERBOSE, "enabled ExtINT on CPU#%d\n", cpu);
1474 } else {
1475 value = APIC_DM_EXTINT | APIC_LVT_MASKED;
1476 apic_printk(APIC_VERBOSE, "masked ExtINT on CPU#%d\n", cpu);
1477 }
1478 apic_write(APIC_LVT0, value);
1479
1480 /*
1481 * only the BP should see the LINT1 NMI signal, obviously.
1482 */
1483 if (!cpu)
1484 value = APIC_DM_NMI;
1485 else
1486 value = APIC_DM_NMI | APIC_LVT_MASKED;
1487 if (!lapic_is_integrated()) /* 82489DX */
1488 value |= APIC_LVT_LEVEL_TRIGGER;
1489 apic_write(APIC_LVT1, value);
1490
---
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