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Tue, 22 Sep 2026 23:29:01 -0700 (PDT) From: Wen Jiang X-Google-Original-From: Wen Jiang To: akpm@linux-foundation.org, catalin.marinas@arm.com, linux-mm@kvack.org, urezki@gmail.com, will@kernel.org Cc: Xueyuan.chen21@gmail.com, ajd@linux.ibm.com, anshuman.khandual@arm.com, baohua@kernel.org, chleroy@kernel.org, david@kernel.org, dev.jain@arm.com, jiangwen6@xiaomi.com, leo.yan@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, rppt@kernel.org, ryan.roberts@arm.com Subject: [PATCH v9 04/10] arm64/hugetlb: drop the init_mm special case in clear_flush() Date: Wed, 23 Sep 2026 14:28:26 +0800 Message-Id: <20260923062832.479455-5-jiangwen6@xiaomi.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260923062832.479455-1-jiangwen6@xiaomi.com> References: <20260923062832.479455-1-jiangwen6@xiaomi.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit clear_flush() calls flush_tlb_kernel_range() when mm is &init_mm. This was added by commit 06fc959fcff7 ("arm64/mm: Support huge pte-mapped pages in vmap") because vmap called set_huge_pte_at(&init_mm, ...). Now that vmap uses pte_set_huge()/pte_clear_huge(), mm/vmalloc.c is no longer a caller of set_huge_pte_at() on arm64. The only remaining callers passing &init_mm are in arch/powerpc, which uses its own implementation. Remove the dead branch. No functional change. Signed-off-by: Wen Jiang --- arch/arm64/mm/hugetlbpage.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 8e799c1fe0aa6..ce247b06fe03d 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -206,10 +206,7 @@ static void clear_flush(struct mm_struct *mm, for (i = 0; i < ncontig; i++, addr += pgsize, ptep++) __ptep_get_and_clear_anysz(mm, addr, ptep, pgsize); - if (mm == &init_mm) - flush_tlb_kernel_range(saddr, addr); - else - __flush_hugetlb_tlb_range(&vma, saddr, addr, pgsize, TLBF_NOWALKCACHE); + __flush_hugetlb_tlb_range(&vma, saddr, addr, pgsize, TLBF_NOWALKCACHE); } void set_huge_pte_at(struct mm_struct *mm, unsigned long addr, -- 2.34.1