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Fri, 26 Jan 2024 23:55:27 GMT Received: from hu-obabatun-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Fri, 26 Jan 2024 15:55:10 -0800 From: Oreoluwa Babatunde To: , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , , , , Oreoluwa Babatunde Subject: [PATCH 28/46] um: resrved_mem: Move fdt_init_reserved_mem() below unflatten_device_tree() Date: Fri, 26 Jan 2024 15:54:07 -0800 Message-ID: <20240126235425.12233-29-quic_obabatun@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20240126235425.12233-1-quic_obabatun@quicinc.com> References: <20240126235425.12233-1-quic_obabatun@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: JdUDySUL0Sb0attbw7OLSmGrM1dNMKEH X-Proofpoint-ORIG-GUID: JdUDySUL0Sb0attbw7OLSmGrM1dNMKEH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-25_14,2024-01-25_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 spamscore=0 priorityscore=1501 mlxlogscore=764 phishscore=0 impostorscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 adultscore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401190000 definitions=main-2401260176 The unflattened devicetree structure is available to be used not long after the page tables have been set up on most architectures, and is available even before that on other architectures. Hence, move the call to fdt_init_reserved_mem() to after unflatten_device_tree() is called so that the reserved memory nodes can be accessed using the unflattened device tree APIs. Using the unflattened devicetree APIs is more efficient than using the flattened devicetree APIs. Signed-off-by: Oreoluwa Babatunde --- arch/um/kernel/dtb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/um/kernel/dtb.c b/arch/um/kernel/dtb.c index 3ecee151a083..ad6003412319 100644 --- a/arch/um/kernel/dtb.c +++ b/arch/um/kernel/dtb.c @@ -27,8 +27,8 @@ void uml_dtb_init(void) } early_fdt_scan_reserved_mem(); - fdt_init_reserved_mem(); unflatten_device_tree(); + fdt_init_reserved_mem(); } static int __init uml_dtb_setup(char *line, int *add)