linux-kernel - [PATCH] irqdomain: add __rcu annotations to radix tree slot

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Message-Id: <1506082841-11530-1-git-send-email-yamada.masahiro@socionext.com>
Date:   Fri, 22 Sep 2017 21:20:41 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>
Cc:     linux-kernel@...r.kernel.org,
        Masahiro Yamada <yamada.masahiro@...ionext.com>
Subject: [PATCH] irqdomain: add __rcu annotations to radix tree slot

Fix different address spaces warning of sparse.

kernel/irq/irqdomain.c:1463:14: warning: incorrect type in assignment (different address spaces)
kernel/irq/irqdomain.c:1463:14:    expected void **slot
kernel/irq/irqdomain.c:1463:14:    got void [noderef] <asn:4>**
kernel/irq/irqdomain.c:1465:66: warning: incorrect type in argument 2 (different address spaces)
kernel/irq/irqdomain.c:1465:66:    expected void [noderef] <asn:4>**slot
kernel/irq/irqdomain.c:1465:66:    got void **slot

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 kernel/irq/irqdomain.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 3a01c27..44a9908 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -946,7 +946,7 @@ static int virq_debug_show(struct seq_file *m, void *private)
 	struct irq_desc *desc;
 	struct irq_domain *domain;
 	struct radix_tree_iter iter;
-	void **slot;
+	void __rcu **slot;
 	int i;
 
 	seq_printf(m, " %-16s  %-6s  %-10s  %-10s  %s\n",
@@ -1454,7 +1454,7 @@ int __irq_domain_alloc_irqs(struct irq_domain *domain, int irq_base,
 /* The irq_data was moved, fix the revmap to refer to the new location */
 static void irq_domain_fix_revmap(struct irq_data *d)
 {
-	void **slot;
+	void __rcu **slot;
 
 	if (d->hwirq < d->domain->revmap_size)
 		return; /* Not using radix tree. */
-- 
2.7.4