genirq: Switch to irq_get_nr_irqs()

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Use the irq_get_nr_irqs() function instead of the global variable
'nr_irqs'. Cache the result of this function in a local variable in
order not to rely on CSE (common subexpression elimination). Prepare
for changing 'nr_irqs' from an exported global variable into a variable
with file scope.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241015190953.1266194-22-bvanassche@acm.org

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Bart Van Assche 2024-10-15 12:09:52 -07:00 • committed by Thomas Gleixner

parent f4dd946c77

commit 1ad2048bf7

3 changed files with 22 additions and 16 deletions

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33

include/linux/irqnr.h

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2

kernel/irq/irqdomain.c

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3

kernel/irq/proc.c

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