linux-kernel - [tip:tracing/urgent] tracing: x86, mmiotrace: fix range test

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Date:	Wed, 29 Apr 2009 11:04:27 GMT
From:	tip-bot for Stuart Bennett <stuart@...edesktop.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	rostedt@...dmis.org, pq@....fi, stuart@...edesktop.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:tracing/urgent] tracing: x86, mmiotrace: fix range test

Commit-ID:  33015c85995716d03f6293346cf05a1908b0fb9a
Gitweb:     http://git.kernel.org/tip/33015c85995716d03f6293346cf05a1908b0fb9a
Author:     Stuart Bennett <stuart@...edesktop.org>
AuthorDate: Tue, 28 Apr 2009 20:17:48 +0100
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 29 Apr 2009 11:32:22 +0200

tracing: x86, mmiotrace: fix range test

Matching on (addr == (p->addr + p->len)) causes problems when mappings
are adjacent.

[ Impact: fix mmiotrace confusion on adjacent iomaps ]

Signed-off-by: Stuart Bennett <stuart@...edesktop.org>
Acked-by: Pekka Paalanen <pq@....fi>
Cc: Steven Rostedt <rostedt@...dmis.org>
LKML-Reference: <1240946271-7083-2-git-send-email-stuart@...edesktop.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/mm/kmmio.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/kmmio.c b/arch/x86/mm/kmmio.c
index 4f115e0..50dc802 100644
--- a/arch/x86/mm/kmmio.c
+++ b/arch/x86/mm/kmmio.c
@@ -87,7 +87,7 @@ static struct kmmio_probe *get_kmmio_probe(unsigned long addr)
 {
 	struct kmmio_probe *p;
 	list_for_each_entry_rcu(p, &kmmio_probes, list) {
-		if (addr >= p->addr && addr <= (p->addr + p->len))
+		if (addr >= p->addr && addr < (p->addr + p->len))
 			return p;
 	}
 	return NULL;
--
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