MAX_ORDER is not inclusive: the maximum allocation order buddy allocator
can deliver is MAX_ORDER-1.
Fix MAX_ORDER usage in tsb_grow().
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx
Cc: David Miller <davem@xxxxxxxxxxxxx>
---
arch/sparc/mm/tsb.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
index 912205787161..dba8dffe2113 100644
--- a/arch/sparc/mm/tsb.c
+++ b/arch/sparc/mm/tsb.c
@@ -402,8 +402,8 @@ void tsb_grow(struct mm_struct *mm, unsigned long tsb_index, unsigned long rss)
unsigned long new_rss_limit;
gfp_t gfp_flags;
- if (max_tsb_size > (PAGE_SIZE << MAX_ORDER))
- max_tsb_size = (PAGE_SIZE << MAX_ORDER);
+ if (max_tsb_size > (PAGE_SIZE << (MAX_ORDER - 1)))
+ max_tsb_size = (PAGE_SIZE << (MAX_ORDER - 1));
new_cache_index = 0;
for (new_size = 8192; new_size < max_tsb_size; new_size <<= 1UL) {
--
2.39.2
