From: Jason Gunthorpe <jgg@ziepe.ca>
To: "Longpeng(Mike)" <longpeng2@huawei.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
kvm@vger.kernel.org, arei.gonglei@huawei.com,
weidong.huang@huawei.com, weifuqiang@huawei.com,
kirill.shutemov@linux.intel.com,
Mike Kravetz <mike.kravetz@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
Matthew Wilcox <willy@infradead.org>,
Sean Christopherson <sean.j.christopherson@intel.com>,
stable@vger.kernel.org
Subject: Re: [PATCH v3] mm/hugetlb: fix a addressing exception caused by huge_pte_offset
Date: Fri, 27 Mar 2020 09:11:00 -0300 [thread overview]
Message-ID: <20200327121100.GR20941@ziepe.ca> (raw)
In-Reply-To: <20200327014007.1915-1-longpeng2@huawei.com>
On Fri, Mar 27, 2020 at 09:40:07AM +0800, Longpeng(Mike) wrote:
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index dd8737a..d4fab68 100644
> +++ b/mm/hugetlb.c
> @@ -4909,29 +4909,33 @@ pte_t *huge_pte_offset(struct mm_struct *mm,
> unsigned long addr, unsigned long sz)
> {
> pgd_t *pgd;
> - p4d_t *p4d;
> - pud_t *pud;
> - pmd_t *pmd;
> + p4d_t *p4g, p4d_entry;
> + pud_t *pud, pud_entry;
> + pmd_t *pmd, pmd_entry;
>
> pgd = pgd_offset(mm, addr);
> if (!pgd_present(*pgd))
> return NULL;
> - p4d = p4d_offset(pgd, addr);
> - if (!p4d_present(*p4d))
> +
> + p4g = p4d_offset(pgd, addr);
Why p4g here? Shouldn't it be p4d?
Jason
next prev parent reply other threads:[~2020-03-27 12:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-27 1:40 [PATCH v3] mm/hugetlb: fix a addressing exception caused by huge_pte_offset Longpeng(Mike)
2020-03-27 12:11 ` Jason Gunthorpe [this message]
2020-03-27 23:32 ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-03-27 15:03 ` Sasha Levin
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