From: Wanpeng Li <[email protected]> When checking the indicated address belongs to the memory or reserved region, the memory or reserved regions are checked one by one through binary search, which would be a little time consuming. If the indicated address isn't in memory region, then we needn't do the time-sonsuming search. The patch adds more check on the indicated address for that purpose.
Signed-off-by: Wanpeng Li <[email protected]> --- mm/memblock.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/mm/memblock.c b/mm/memblock.c index 2feff8d..880e461 100644 --- a/mm/memblock.c +++ b/mm/memblock.c @@ -871,6 +871,10 @@ static int __init_memblock memblock_search(struct memblock_type *type, phys_addr { unsigned int left = 0, right = type->cnt; + if (unlikely(addr < memblock_start_of_DRAM() || + addr >= memblock_end_of_DRAM())) + return 0; + do { unsigned int mid = (right + left) / 2; -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
