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Subject[tip: x86/entry] x86/idt: Use proper constants for table size
The following commit has been merged into the x86/entry branch of tip:

Commit-ID: ab46346736ed50ed90f4bfb854f4bec61fecee9e
Gitweb: https://git.kernel.org/tip/ab46346736ed50ed90f4bfb854f4bec61fecee9e
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Thu, 28 May 2020 16:53:18 +02:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Sat, 30 May 2020 11:50:12 +02:00

x86/idt: Use proper constants for table size

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

---
arch/x86/kernel/idt.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 5ef82fc..b6e1a87 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -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,
};

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