bab537805a
NO_IRQ is a relic from the old days. It is not used anymore in core functions. By the way, function irq_of_parse_and_map() returns value 0 on error. In some drivers, NO_IRQ is erroneously used to check the return of irq_of_parse_and_map(). It is not a real bug today because the only architectures using the drivers being fixed by this patch define NO_IRQ as 0, but there are architectures which define NO_IRQ as -1. If one day those architectures start using the non fixed drivers, there will be a problem. Long time ago Linus advocated for not using NO_IRQ, see https://lore.kernel.org/all/Pine.LNX.4.64.0511211150040.13959@g5.osdl.org He re-iterated the same view recently in https://lore.kernel.org/all/CAHk-=wg2Pkb9kbfbstbB91AJA2SF6cySbsgHG-iQMq56j3VTcA@mail.gmail.com So test !irq instead of tesing irq == NO_IRQ. All other usage of NO_IRQ for powerpc were removed in previous cycles so the time has come to remove NO_IRQ completely for powerpc. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/4b8d4f96140af01dec3a3330924dda8b2451c316.1674476798.git.christophe.leroy@csgroup.eu
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifdef __KERNEL__
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#ifndef _ASM_POWERPC_IRQ_H
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#define _ASM_POWERPC_IRQ_H
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/*
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*/
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#include <linux/threads.h>
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#include <linux/list.h>
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#include <linux/radix-tree.h>
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#include <asm/types.h>
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#include <linux/atomic.h>
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extern atomic_t ppc_n_lost_interrupts;
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/* Total number of virq in the platform */
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#define NR_IRQS CONFIG_NR_IRQS
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/* Number of irqs reserved for a legacy isa controller */
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#define NR_IRQS_LEGACY 16
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extern irq_hw_number_t virq_to_hw(unsigned int virq);
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static __inline__ int irq_canonicalize(int irq)
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{
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return irq;
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}
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extern int distribute_irqs;
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struct pt_regs;
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#ifdef CONFIG_BOOKE_OR_40x
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/*
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* Per-cpu stacks for handling critical, debug and machine check
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* level interrupts.
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*/
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extern void *critirq_ctx[NR_CPUS];
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extern void *dbgirq_ctx[NR_CPUS];
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extern void *mcheckirq_ctx[NR_CPUS];
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#endif
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/*
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* Per-cpu stacks for handling hard and soft interrupts.
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*/
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extern void *hardirq_ctx[NR_CPUS];
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extern void *softirq_ctx[NR_CPUS];
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void __do_IRQ(struct pt_regs *regs);
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extern void __init init_IRQ(void);
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int irq_choose_cpu(const struct cpumask *mask);
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#endif /* _ASM_IRQ_H */
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#endif /* __KERNEL__ */
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