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Tue, 15 Sep 2020 06:03:44 -0700 (PDT) From: Muchun Song To: corbet@lwn.net, mike.kravetz@oracle.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, viro@zeniv.linux.org.uk, akpm@linux-foundation.org, paulmck@kernel.org, mchehab+huawei@kernel.org, pawan.kumar.gupta@linux.intel.com, rdunlap@infradead.org, oneukum@suse.com, anshuman.khandual@arm.com, jroedel@suse.de, almasrymina@google.com, rientjes@google.com Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Muchun Song Subject: [RFC PATCH 22/24] mm/hugetlb: Implement vmemmap_pmd_mkhuge macro Date: Tue, 15 Sep 2020 20:59:45 +0800 Message-Id: <20200915125947.26204-23-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20200915125947.26204-1-songmuchun@bytedance.com> References: <20200915125947.26204-1-songmuchun@bytedance.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 8EA231819E627 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam05 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: In vmemmap_populate_hugepages(), we use PAGE_KERNEL_LARGE for huge page mapping. So we can inplement vmemmap_pmd_mkhuge macro to do that. Signed-off-by: Muchun Song --- arch/x86/include/asm/hugetlb.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetl= b.h index 7c3eb60c2198..9f9e19dd0578 100644 --- a/arch/x86/include/asm/hugetlb.h +++ b/arch/x86/include/asm/hugetlb.h @@ -15,6 +15,14 @@ static inline bool vmemmap_pmd_huge(pmd_t *pmd) { return pmd_large(*pmd); } + +#define vmemmap_pmd_mkhuge vmemmap_pmd_mkhuge +static inline pmd_t vmemmap_pmd_mkhuge(struct page *page) +{ + pte_t entry =3D pfn_pte(page_to_pfn(page), PAGE_KERNEL_LARGE); + + return __pmd(pte_val(entry)); +} #endif =20 #define hugepages_supported() boot_cpu_has(X86_FEATURE_PSE) --=20 2.20.1