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authorDou Liyang <douly.fnst@cn.fujitsu.com>2018-05-23 10:35:55 +0800
committerThomas Gleixner <tglx@linutronix.de>2018-06-06 13:38:01 +0200
commit336628128826a9acb045571a960e32e4414ccb61 (patch)
tree172d0a021897995579b33c5a8a3f11f89d15a9c4 /arch/x86/kernel
parentcce2946b9b30a9b31a18de737d5010c08076e77f (diff)
x86/idt: Simplify the idt_setup_apic_and_irq_gates()
The idt_setup_apic_and_irq_gates() sets the gates from FIRST_EXTERNAL_VECTOR up to FIRST_SYSTEM_VECTOR first. then secondly, from FIRST_SYSTEM_VECTOR to NR_VECTORS, it takes both APIC=y and APIC=n into account. But for APIC=n, the FIRST_SYSTEM_VECTOR is equal to NR_VECTORS, all vectors has been set at the first step. Simplify the second step, make it just work for APIC=y. Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20180523023555.2933-1-douly.fnst@cn.fujitsu.com
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/idt.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 2c3a1b4294eb..74383a3780dc 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -317,15 +317,12 @@ void __init idt_setup_apic_and_irq_gates(void)
set_intr_gate(i, entry);
}
- for_each_clear_bit_from(i, system_vectors, NR_VECTORS) {
#ifdef CONFIG_X86_LOCAL_APIC
+ for_each_clear_bit_from(i, system_vectors, NR_VECTORS) {
set_bit(i, system_vectors);
set_intr_gate(i, spurious_interrupt);
-#else
- entry = irq_entries_start + 8 * (i - FIRST_EXTERNAL_VECTOR);
- set_intr_gate(i, entry);
-#endif
}
+#endif
}
/**