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Wed, 13 Aug 2025 06:27:45 +0000 (GMT) From: Andrew Donnellan To: linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org Cc: akpm@linux-foundation.org, x86@kernel.org, linux-riscv@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, pasha.tatashin@soleen.com, sweettea-kernel@dorminy.me, nicholas@linux.ibm.com, christophe.leroy@csgroup.eu, Rohan McLure , Madhavan Srinivasan Subject: [PATCH v16 10/13] powerpc: mm: Add pud_pfn() stub Date: Wed, 13 Aug 2025 16:26:11 +1000 Message-ID: <20250813062614.51759-11-ajd@linux.ibm.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250813062614.51759-1-ajd@linux.ibm.com> References: <20250813062614.51759-1-ajd@linux.ibm.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 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 6p78tIu4d1GxeDYW0_yoMYEY7Uv1CVko X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwODEyMDIyNCBTYWx0ZWRfX7SEwZJR9uMEo twnLAjMn1uDuQyNZFvA5mghsluXsrnnNXzdlUz6WtiuS1mzji4hMRYhDtFXzKdsF1+dii5tv0OK BXF3GJhRE4Y31srrKALkZx8xNOBm23JXu/foFaUhocmzOkUk8WWqGvVm77BftHaXkfhZ32Na2EN yNGLCWhCqEBpUzlnE3kSKahcHr+OemUixZd+rxh6kXeHWoIEKfLtMNfa7vMpjD5zkrgTYDKoJBa /G+mhmgKee31fJSwJtZqqRwu5G2dUHERaHLdGVfNOddfx64sKo8ruZRfrSDufbwcUmwYso2UXCF 5tAN90eLLoWhejCdoXT2qTEnPXyeG2HHqlMFJumDS3tekxkh1Jb/YEkrLSN0IgLCfZuQz8iC6+F mV3/I3lB X-Authority-Analysis: v=2.4 cv=QtNe3Uyd c=1 sm=1 tr=0 ts=689c306a cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=2OwXVqhp2XgA:10 a=VnNF1IyMAAAA:8 a=7ipKWUHlAAAA:8 a=qzKveJzcHEAUI94IIBQA:9 a=gpc5p9EgBqZVLdJeV_V1:22 X-Proofpoint-ORIG-GUID: 6p78tIu4d1GxeDYW0_yoMYEY7Uv1CVko X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1099,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-08-12_08,2025-08-11_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 priorityscore=1501 phishscore=0 clxscore=1015 malwarescore=0 spamscore=0 suspectscore=0 impostorscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2508120224 Content-Type: text/plain; charset="utf-8" From: Rohan McLure The page table check feature requires that pud_pfn() be defined on each consuming architecture. Since only 64-bit, Book3S platforms allow for hugepages at this upper level, and since the calling code is gated by a call to pud_user_accessible_page(), which will return zero, include this stub as a BUILD_BUG(). Signed-off-by: Rohan McLure Reviewed-by: Pasha Tatashin Signed-off-by: Andrew Donnellan Acked-by: Madhavan Srinivasan --- arch/powerpc/include/asm/pgtable.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/= pgtable.h index 93d77ad5a92f..0f73a9ade0ed 100644 --- a/arch/powerpc/include/asm/pgtable.h +++ b/arch/powerpc/include/asm/pgtable.h @@ -214,6 +214,15 @@ static inline bool arch_supports_memmap_on_memory(unsi= gned long vmemmap_size) =20 #endif /* CONFIG_PPC64 */ =20 +#ifndef pud_pfn +#define pud_pfn pud_pfn +static inline int pud_pfn(pud_t pud) +{ + BUILD_BUG(); + return 0; +} +#endif + #endif /* __ASSEMBLY__ */ =20 #endif /* _ASM_POWERPC_PGTABLE_H */ --=20 2.50.1