genirq: Calculate precision only when required

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Calculating the precision of the interrupt number column on every initial
show_interrupt() invocation is a pointless exercise as the underlying
maximum number of interrupts rarely changes.

Calculate it only when that number is modified and let show_interrupts()
use the cached value.

Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Dmitry Ilvokhin <d@ilvokhin.com>
Reviewed-by: Radu Rendec <radu@rendec.net>
Link: https://patch.msgid.link/20260517194931.760664517@kernel.org

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This commit is contained in:

Thomas Gleixner 2026-05-17 22:02:24 +02:00

parent 4892e5e71e

commit 2d62735f1d

3 changed files with 35 additions and 14 deletions

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6

kernel/irq/internals.h

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10

kernel/irq/irqdesc.c

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33

kernel/irq/proc.c

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