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Wed, 08 Oct 2025 18:58:43 -0700 (PDT) From: Samuel Holland To: Palmer Dabbelt , Paul Walmsley , linux-riscv@lists.infradead.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Conor Dooley , Alexandre Ghiti , Emil Renner Berthing , Andrew Morton , Rob Herring , Krzysztof Kozlowski , Samuel Holland Subject: [PATCH v2 02/18] perf/core: Replace READ_ONCE() with standard page table accessors Date: Wed, 8 Oct 2025 18:57:38 -0700 Message-ID: <20251009015839.3460231-3-samuel.holland@sifive.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20251009015839.3460231-1-samuel.holland@sifive.com> References: <20251009015839.3460231-1-samuel.holland@sifive.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace READ_ONCE() with standard page table accessors, i.e. pXXp_get(), which have a default implementation of READ_ONCE() if the architecture does not override them. Signed-off-by: Samuel Holland --- Changes in v2: - New patch for v2 kernel/events/core.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/kernel/events/core.c b/kernel/events/core.c index 820127536e62b..952ba4e3d8815 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -8110,7 +8110,7 @@ static u64 perf_get_pgtable_size(struct mm_struct *mm= , unsigned long addr) pte_t *ptep, pte; =20 pgdp =3D pgd_offset(mm, addr); - pgd =3D READ_ONCE(*pgdp); + pgd =3D pgdp_get(pgdp); if (pgd_none(pgd)) return 0; =20 @@ -8118,7 +8118,7 @@ static u64 perf_get_pgtable_size(struct mm_struct *mm= , unsigned long addr) return pgd_leaf_size(pgd); =20 p4dp =3D p4d_offset_lockless(pgdp, pgd, addr); - p4d =3D READ_ONCE(*p4dp); + p4d =3D p4dp_get(p4dp); if (!p4d_present(p4d)) return 0; =20 @@ -8126,7 +8126,7 @@ static u64 perf_get_pgtable_size(struct mm_struct *mm= , unsigned long addr) return p4d_leaf_size(p4d); =20 pudp =3D pud_offset_lockless(p4dp, p4d, addr); - pud =3D READ_ONCE(*pudp); + pud =3D pudp_get(pudp); if (!pud_present(pud)) return 0; =20 --=20 2.47.2