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lmb: Fix reserved region handling in lmb_enforce_memory_limit().

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The idea of the implementation of this fix is from Michael Ellerman.

This function has two loops, but they each interpret the memory_limit
value differently.  The first loop interprets it as a "size limit"
whereas the second loop interprets it as an "address limit".

Before the second loop runs, reset memory_limit to lmb_end_of_DRAM()
so that it all works out.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Michael Ellerman <michael@ellerman.id.au>
This commit is contained in:
David S. Miller 2008-08-15 19:57:57 -07:00
parent f2b6079464
commit ebb1951d36
1 changed files with 2 additions and 0 deletions
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2
lib/lmb.c
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@ -462,6 +462,8 @@ void __init lmb_enforce_memory_limit(u64 memory_limit)
if (lmb.memory.region[0].size < lmb.rmo_size) if (lmb.memory.region[0].size < lmb.rmo_size)
lmb.rmo_size = lmb.memory.region[0].size; lmb.rmo_size = lmb.memory.region[0].size;
memory_limit = lmb_end_of_DRAM();
/* And truncate any reserves above the limit also. */ /* And truncate any reserves above the limit also. */
for (i = 0; i < lmb.reserved.cnt; i++) { for (i = 0; i < lmb.reserved.cnt; i++) {
p = &lmb.reserved.region[i]; p = &lmb.reserved.region[i];