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Mon, 24 Jul 2023 18:13:30 +0000 (GMT) Received: from smtpav03.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 060AC58056; Mon, 24 Jul 2023 18:13:28 +0000 (GMT) Received: from skywalker.ibmuc.com (unknown [9.177.66.22]) by smtpav03.dal12v.mail.ibm.com (Postfix) with ESMTP; Mon, 24 Jul 2023 18:13:27 +0000 (GMT) From: "Aneesh Kumar K.V" To: linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu Subject: [PATCH] powerpc/mm/altmap: Fix altmap boundary check Date: Mon, 24 Jul 2023 23:43:20 +0530 Message-ID: <20230724181320.471386-1-aneesh.kumar@linux.ibm.com> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 7wVNwv09-i2ai-heEnEGEjKuTZDPWy4m X-Proofpoint-GUID: 3L-hGvgoTlvBFrxij0VfDSb4rjad7f7b X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-24_14,2023-07-24_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 spamscore=0 priorityscore=1501 adultscore=0 clxscore=1015 mlxscore=0 suspectscore=0 malwarescore=0 mlxlogscore=999 lowpriorityscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307240161 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Aneesh Kumar K.V" , Dan Williams , David Hildenbrand Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" altmap->free includes the entire free space from which altmap blocks can be allocated. So when checking whether the kernel is doing altmap block free, compute the boundary correctly. Cc: David Hildenbrand Cc: Dan Williams Fixes: 9ef34630a461 ("powerpc/mm: Fallback to RAM if the altmap is unusable") Signed-off-by: Aneesh Kumar K.V Reviewed-by: David Hildenbrand --- arch/powerpc/mm/init_64.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c index fe1b83020e0d..0ec5b45b1e86 100644 --- a/arch/powerpc/mm/init_64.c +++ b/arch/powerpc/mm/init_64.c @@ -314,8 +314,7 @@ void __ref vmemmap_free(unsigned long start, unsigned long end, start = ALIGN_DOWN(start, page_size); if (altmap) { alt_start = altmap->base_pfn; - alt_end = altmap->base_pfn + altmap->reserve + - altmap->free + altmap->alloc + altmap->align; + alt_end = altmap->base_pfn + altmap->reserve + altmap->free; } pr_debug("vmemmap_free %lx...%lx\n", start, end);