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authorKumar Gala <galak@kernel.crashing.org>2008-02-13 16:58:11 -0800
committerDavid S. Miller <davem@davemloft.net>2008-02-13 16:58:11 -0800
commit27e6672bb9912d3e3a41cf88e6142d3ae5e534b3 (patch)
treef2c84845f8e2c43b0871322acc96295def395d51
parenteea89e13a9c61d3928223d2f9bf2295e22e0efb6 (diff)
downloadlinux-27e6672bb9912d3e3a41cf88e6142d3ae5e534b3.tar.bz2
[LMB]: Fix initial lmb add region with a non-zero base
If we add to an empty lmb region with a non-zero base we will not coalesce the number of regions down to one. This causes problems on ppc32 for the memory region as its assumed to only have one region. We can fix this be easily specially casing the initial add to just replace the dummy region. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--lib/lmb.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/lmb.c b/lib/lmb.c
index 6390d63a2a0e..e34a9e586c42 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -134,6 +134,12 @@ static long __init lmb_add_region(struct lmb_region *rgn, unsigned long base,
unsigned long coalesced = 0;
long adjacent, i;
+ if ((rgn->cnt == 1) && (rgn->region[0].size == 0)) {
+ rgn->region[0].base = base;
+ rgn->region[0].size = size;
+ return 0;
+ }
+
/* First try and coalesce this LMB with another. */
for (i=0; i < rgn->cnt; i++) {
unsigned long rgnbase = rgn->region[i].base;