mm/hugetlb: remove redundant check in preparing and destroying gigantic page

stable inclusion
from stable-5.10.50
commit 2e16ad561143b97df021016e1835e5ea72ad499a
bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=2e16ad561143b97df021016e1835e5ea72ad499a

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[ Upstream commit 5291c09b ]

Gigantic page is a compound page and its order is more than 1.  Thus it
must be available for hpage_pincount.  Let's remove the redundant check
for gigantic page.

Link: https://lkml.kernel.org/r/20210202112002.73170-1-yanfei.xu@windriver.com


Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by: Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>