From: Miaohe Lin <linmiaohe@huawei.com>
To: <akpm@linux-foundation.org>
Cc: <ziy@nvidia.com>, <willy@infradead.org>,
<william.kucharski@oracle.com>, <vbabka@suse.cz>,
<peterx@redhat.com>, <yulei.kernel@gmail.com>,
<walken@google.com>, <aneesh.kumar@linux.ibm.com>,
<rcampbell@nvidia.com>, <thomas_os@shipmail.org>,
<yang.shi@linux.alibaba.com>, <richard.weiyang@linux.alibaba.com>,
<linux-kernel@vger.kernel.org>, <linux-mm@kvack.org>,
<linmiaohe@huawei.com>
Subject: [PATCH v3 4/6] mm/huge_memory.c: remove redundant PageCompound() check
Date: Thu, 18 Mar 2021 08:27:20 -0400 [thread overview]
Message-ID: <20210318122722.13135-5-linmiaohe@huawei.com> (raw)
In-Reply-To: <20210318122722.13135-1-linmiaohe@huawei.com>
The !PageCompound() check limits the page must be head or tail while
!PageHead() further limits it to page head only. So !PageHead() check
is equivalent here.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
---
mm/huge_memory.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 23964adf5db2..52acc3954afd 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1291,7 +1291,7 @@ vm_fault_t do_huge_pmd_wp_page(struct vm_fault *vmf, pmd_t orig_pmd)
}
page = pmd_page(orig_pmd);
- VM_BUG_ON_PAGE(!PageCompound(page) || !PageHead(page), page);
+ VM_BUG_ON_PAGE(!PageHead(page), page);
/* Lock page for reuse_swap_page() */
if (!trylock_page(page)) {
--
2.19.1
next prev parent reply other threads:[~2021-03-18 12:28 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-18 12:27 [PATCH v3 0/6] Some cleanups for huge_memory Miaohe Lin
2021-03-18 12:27 ` [PATCH v3 1/6] mm/huge_memory.c: rework the function vma_adjust_trans_huge() Miaohe Lin
2021-03-18 12:27 ` [PATCH v3 2/6] mm/huge_memory.c: make get_huge_zero_page() return bool Miaohe Lin
2021-03-18 14:00 ` Zi Yan
2021-03-18 12:27 ` [PATCH v3 3/6] mm/huge_memory.c: rework the function do_huge_pmd_numa_page() slightly Miaohe Lin
2021-03-18 14:04 ` Zi Yan
2021-03-18 12:27 ` Miaohe Lin [this message]
2021-03-18 12:27 ` [PATCH v3 5/6] mm/huge_memory.c: remove unused macro TRANSPARENT_HUGEPAGE_DEBUG_COW_FLAG Miaohe Lin
2021-03-18 14:12 ` Zi Yan
2021-03-18 12:27 ` [PATCH v3 6/6] mm/huge_memory.c: use helper function migration_entry_to_page() Miaohe Lin
2021-03-18 15:07 ` [PATCH v3 0/6] Some cleanups for huge_memory Peter Xu
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