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x86/idt: Use proper constants for table size

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Use the actual struct size to calculate the IDT table size instead of
hardcoded values.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20200528145522.898591501@linutronix.de
This commit is contained in:
Thomas Gleixner 2020-05-28 16:53:18 +02:00
parent 94438af40d
commit 5a2bafca1b
1 changed files with 2 additions and 1 deletions
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3
arch/x86/kernel/idt.c
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@ -51,6 +51,7 @@ struct idt_data {
#define TSKG(_vector, _gdt) \
G(_vector, NULL, DEFAULT_STACK, GATE_TASK, DPL0, _gdt << 3)
#define IDT_TABLE_SIZE (IDT_ENTRIES * sizeof(gate_desc))
static bool idt_setup_done __initdata;
@ -168,7 +169,7 @@ static const __initconst struct idt_data early_pf_idts[] = {
gate_desc idt_table[IDT_ENTRIES] __page_aligned_bss;
struct desc_ptr idt_descr __ro_after_init = {
.size = (IDT_ENTRIES * 2 * sizeof(unsigned long)) - 1,
.size = IDT_TABLE_SIZE - 1,
.address = (unsigned long) idt_table,
};