linux-kernel - [RFC PATCH 2/5] sh: Remove irq_reserve

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Message-Id: <1396762766-4942-3-git-send-email-yinghai@kernel.org>
Date:	Sat,  5 Apr 2014 22:39:23 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	"H. Peter Anvin" <hpa@...or.com>, Tony Luck <tony.luck@...el.com>
Cc:	linux-kernel@...r.kernel.org, Yinghai Lu <yinghai@...nel.org>,
	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org
Subject: [RFC PATCH 2/5] sh: Remove irq_reserve_irq calling

in sh calling path:
	register_intc_controller
		==> irq_create_identity_mapping/irq_create_strict_mappins
			==>irq_alloc_desc: it will set bits on allocate_irq
		==> intc_register_irq
			==> irq_reserve_irq: set bits again

so we can kill this irq_reserve_irq calling.

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
Cc: Simon Horman <horms@...ge.net.au>
Cc: Magnus Damm <magnus.damm@...il.com>
Cc: linux-sh@...r.kernel.org
---
 drivers/sh/intc/core.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/sh/intc/core.c b/drivers/sh/intc/core.c
index 8f32a13..05118f92 100644
--- a/drivers/sh/intc/core.c
+++ b/drivers/sh/intc/core.c
@@ -81,11 +81,8 @@ static void __init intc_register_irq(struct intc_desc *desc,
 	unsigned long flags;
 
 	/*
-	 * Register the IRQ position with the global IRQ map, then insert
-	 * it in to the radix tree.
+	 * insert it in to the radix tree.
 	 */
-	irq_reserve_irq(irq);
-
 	raw_spin_lock_irqsave(&intc_big_lock, flags);
 	radix_tree_insert(&d->tree, enum_id, intc_irq_xlate_get(irq));
 	raw_spin_unlock_irqrestore(&intc_big_lock, flags);
-- 
1.8.4.5

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