mm/mmap: regression fix for unmapped_area{_topdown}

The maple tree limits the gap returned to a window that specifically fits
what was asked.  This may not be optimal in the case of switching search
directions or a gap that does not satisfy the requested space for other
reasons.  Fix the search by retrying the operation and limiting the search
window in the rare occasion that a conflict occurs.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 3499a13168da ("mm/mmap: use maple tree for unmapped_area{_topdown}")
Signed-off-by: Liam R. Howlett <[email protected]>
Reported-by: Rick Edgecombe <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions