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Commit e0b47794 authored by Thomas Gleixner's avatar Thomas Gleixner
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genirq/debugfs: Show debug information for all irq descriptors 



Currently the debugfs shows only information about actively used interrupts
like /proc/irq/ does. That's fine for most cases, but not helpful when
internals of allocated, but unused interrupt descriptors have to
debugged. It's also useful to provide information about all descriptors so
leaks can be debugged in a simpler way.

Move the debugfs registration to the descriptor allocation code.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Tested-by: default avatarJuergen Gross <jgross@suse.com>
Tested-by: default avatarYu Chen <yu.c.chen@intel.com>
Acked-by: default avatarJuergen Gross <jgross@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Alok Kataria <akataria@vmware.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Rui Zhang <rui.zhang@intel.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: https://lkml.kernel.org/r/20170913213152.355525908@linutronix.de
parent 2827a418

kernel/irq/irqdesc.c

+1 −0
Original line number Diff line number Diff line
@@ -462,6 +462,7 @@ static int alloc_descs(unsigned int start, unsigned int cnt, int node, 
			goto err;

		irq_insert_desc(start + i, desc);

		irq_sysfs_add(start + i, desc);

		irq_add_debugfs_entry(start + i, desc);

	}

	bitmap_set(allocated_irqs, start, cnt);

	return start;

kernel/irq/manage.c

+0 −1
Original line number Diff line number Diff line
@@ -1400,7 +1400,6 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new) 
		wake_up_process(new->secondary->thread);



	register_irq_proc(irq, desc);

	irq_add_debugfs_entry(irq, desc);

	new->dir = NULL;

	register_handler_proc(irq, new);

	return 0;