While mapping hints with a length that cross 128TB are disallowed,
MAP_FIXED allocations that cross 128TB are allowed. These are failing
on hash (on radix they succeed). Add an additional case for fixed
mappings to expand the addr_limit when crossing 128TB.
Cc: "Aneesh Kumar K.V" <aneesh.ku...@linux.vnet.ibm.com>
Fixes: f4ea6dcb08 ("powerpc/mm: Enable mappings above 128TB")
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/mm/slice.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/mm/slice.c b/arch/powerpc/mm/slice.c
index 567db541c0a1..f980397b449d 100644
--- a/arch/powerpc/mm/slice.c
+++ b/arch/powerpc/mm/slice.c
@@ -419,7 +419,8 @@ unsigned long slice_get_unmapped_area(unsigned long addr,
unsigned long len,
/*
* Check if we need to expland slice area.
*/
- if (unlikely(addr > mm->context.addr_limit &&
+ if (unlikely(((addr > mm->context.addr_limit) ||
+ (fixed && addr + len > mm->context.addr_limit)) &&
mm->context.addr_limit != TASK_SIZE)) {
mm->context.addr_limit = TASK_SIZE;
on_each_cpu(slice_flush_segments, mm, 1);
--
2.15.0
