Messages in this thread Patch in this message | | | From | Dou Liyang <> | Subject | [PATCH] x86/apic: Replace the redundant macros with an empty stub | Date | Wed, 17 Jan 2018 15:37:48 +0800 |
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The X86_LOCAL_APIC is depended on CONFIG X86_64, that means if CONFIG_X86_64=y, the X86_LOCAL_APIC must be y too.
So, using
if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC)
... is redundant.
Remove the redundant macros and add an empty stub instead. also add some comments for init_bsp_APIC().
Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com> --- arch/x86/include/asm/apic.h | 1 + arch/x86/kernel/irqinit.c | 9 +++++++-- 2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h index 98722773391d..6e1990d69865 100644 --- a/arch/x86/include/asm/apic.h +++ b/arch/x86/include/asm/apic.h @@ -183,6 +183,7 @@ static inline void disable_local_APIC(void) { } # define setup_boot_APIC_clock x86_init_noop # define setup_secondary_APIC_clock x86_init_noop static inline void lapic_update_tsc_freq(void) { } +static inline void init_bsp_APIC(void) { } static inline void apic_intr_mode_init(void) { } static inline void lapic_assign_system_vectors(void) { } static inline void lapic_assign_legacy_vector(unsigned int i, bool r) { } diff --git a/arch/x86/kernel/irqinit.c b/arch/x86/kernel/irqinit.c index a539410c4ea9..a0e41397558e 100644 --- a/arch/x86/kernel/irqinit.c +++ b/arch/x86/kernel/irqinit.c @@ -61,9 +61,14 @@ void __init init_ISA_irqs(void) struct irq_chip *chip = legacy_pic->chip; int i; -#if defined(CONFIG_X86_64) || defined(CONFIG_X86_LOCAL_APIC) + /* + * Try to setup the through-local-APIC virtual wire mode earlier. + * + * In some 32bit UP machines whose APIC has been disabled by BIOS + * and re-enabled by "lapic", it hangs at boot time without this. + */ init_bsp_APIC(); -#endif + legacy_pic->init(0); for (i = 0; i < nr_legacy_irqs(); i++) -- 2.14.3
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