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x86/irq: Fix comment on IRQ vector layout

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commit f5a3562ec9 ("x86/irq: Reserve a per CPU IDT vector for posted
MSIs") changed the first system vector from LOCAL_TIMER_VECTOR to
POSTED_MSI_NOTIFICATION_VECTOR. Reflect this change in the vector layout
comment as well.

However, instead of pointing to the specific vector, use the
FIRST_SYSTEM_VECTOR indirection which essentially refers to the same.

This avoids unnecessary modifications to the same comment whenever
additional system vectors get added.

Signed-off-by: Sohil Mehta <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Reviewed-by: Jacob Pan <[email protected]>
Link: https://lore.kernel.org/all/[email protected]
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Sohil Mehta authored and Thomas Gleixner committed 2024-08-13 12:00:09 +02:00
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commit a1fab3e69d
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+2 -2
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arch/x86/include/asm/irq_vectors.h
+2 -2
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@@ -18,8 +18,8 @@
* Vectors 0 ... 31 : system traps and exceptions - hardcoded events
* Vectors 32 ... 127 : device interrupts
* Vector 128 : legacy int80 syscall interface
* Vectors 129 ... LOCAL_TIMER_VECTOR-1
* Vectors LOCAL_TIMER_VECTOR ... 255 : special interrupts
* Vectors 129 ... FIRST_SYSTEM_VECTOR-1 : device interrupts
* Vectors FIRST_SYSTEM_VECTOR ... 255 : special interrupts
*
* 64-bit x86 has per CPU IDT tables, 32-bit has one shared IDT table.
*