linux-kernel - [PATCH 14/72] Blackfin: inline I-pipe bypass code in ret_from

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Date:	Mon, 14 Sep 2009 16:07:18 -0400
From:	Mike Frysinger <vapier@...too.org>
To:	linux-kernel@...r.kernel.org
Cc:	uclinux-dist-devel@...ckfin.uclinux.org,
	Philippe Gerum <rpm@...omai.org>
Subject: [PATCH 14/72] Blackfin: inline I-pipe bypass code in ret_from_exception

From: Philippe Gerum <rpm@...omai.org>

Signed-off-by: Philippe Gerum <rpm@...omai.org>
Signed-off-by: Mike Frysinger <vapier@...too.org>
---
 arch/blackfin/kernel/ipipe.c      |    5 -----
 arch/blackfin/mach-common/entry.S |   14 +++++++-------
 2 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/arch/blackfin/kernel/ipipe.c b/arch/blackfin/kernel/ipipe.c
index be4f24e..5d73823 100644
--- a/arch/blackfin/kernel/ipipe.c
+++ b/arch/blackfin/kernel/ipipe.c
@@ -164,11 +164,6 @@ out:
 		__clear_bit(IPIPE_STALL_FLAG, &p->status);
 }
 
-int __ipipe_check_root(void)
-{
-	return ipipe_root_domain_p;
-}
-
 void __ipipe_enable_irqdesc(struct ipipe_domain *ipd, unsigned irq)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index 2c58b60..cbc5b6d 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -840,13 +840,13 @@ ENDPROC(_resume)
 
 ENTRY(_ret_from_exception)
 #ifdef CONFIG_IPIPE
-	[--sp] = rets;
-	SP += -12;
-	call ___ipipe_check_root
-	SP += 12
-	rets = [sp++];
-	cc = r0 == 0;
-	if cc jump 4f;                /* not on behalf of Linux, get out */
+	p2.l = _per_cpu__ipipe_percpu_domain;
+	p2.h = _per_cpu__ipipe_percpu_domain;
+	r0.l = _ipipe_root;
+	r0.h = _ipipe_root;
+	r2 = [p2];
+	cc = r0 == r2;
+	if !cc jump 4f;  /* not on behalf of the root domain, get out */
 #endif /* CONFIG_IPIPE */
 	p2.l = lo(IPEND);
 	p2.h = hi(IPEND);
-- 
1.6.4.2

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