linux-kernel - [PATCH] [LMB]: Fix lmb_add_region if region should be added at the head

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Date:	Tue, 19 Feb 2008 22:27:48 -0600 (CST)
From:	Kumar Gala <galak@...nel.crashing.org>
To:	davem@...emloft.net
cc:	sparclinux@...r.kernel.org, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] [LMB]: Fix lmb_add_region if region should be added at the
 head

We introduced a bug in fixing lmb_add_region to handle an initial
region being non-zero.  Before that fix it was impossible to insert
a region at the head of the list since the first region always started
at zero.

Now that its possible for the first region to be non-zero we need to
check to see if the new region should be added at the head and if so
actually add it.

Signed-off-by: Kumar Gala <galak@...nel.crashing.org>
---
 lib/lmb.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/lib/lmb.c b/lib/lmb.c
index e3c8dcb..3c43b95 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -184,6 +184,11 @@ static long __init lmb_add_region(struct lmb_region *rgn, u64 base, u64 size)
 			break;
 		}
 	}
+
+	if (base < rgn->region[0].base) {
+		rgn->region[0].base = base;
+		rgn->region[0].size = size;
+	}
 	rgn->cnt++;

 	return 0;
-- 
1.5.3.8

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