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Sat, 10 Feb 2024 00:29:49 GMT Received: from th-lint-014.qualcomm.com (10.80.80.8) 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, 9 Feb 2024 16:29:46 -0800 From: Oreoluwa Babatunde To: , , , , , , , , CC: , , , , , , Oreoluwa Babatunde Subject: [PATCH 3/3] sh: Call paging_init() earlier in the init sequence Date: Fri, 9 Feb 2024 16:29:31 -0800 Message-ID: <1707524971-146908-4-git-send-email-quic_obabatun@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1707524971-146908-1-git-send-email-quic_obabatun@quicinc.com> References: <1707524971-146908-1-git-send-email-quic_obabatun@quicinc.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) 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: Ayi3Q_Ob1ob7P-VVfjTiuXJiq6E1gt_K X-Proofpoint-ORIG-GUID: Ayi3Q_Ob1ob7P-VVfjTiuXJiq6E1gt_K 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=2024-02-09_20,2024-02-08_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 suspectscore=0 bulkscore=0 mlxlogscore=862 lowpriorityscore=0 clxscore=1015 spamscore=0 priorityscore=1501 adultscore=0 malwarescore=0 impostorscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2401310000 definitions=main-2402100002 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790470311683678235 X-GMAIL-MSGID: 1790470311683678235 The unflatten_device_tree() function contains a call to memblock_alloc(). This is a problem because this allocation is done before any of the reserved memory is set aside in paging_init(). This means that there is a possibility for memblock to allocate from any of the memory regions that are supposed to be set aside as reserved. Hence, move the call to paging_init() to be earlier in the init sequence so that the reserved memory regions are set aside before any allocations are done using memblock. Signed-off-by: Oreoluwa Babatunde --- arch/sh/kernel/setup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index d3175f0..ea40798 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -322,6 +322,8 @@ void __init setup_arch(char **cmdline_p) /* Let earlyprintk output early console messages */ sh_early_platform_driver_probe("earlyprintk", 1, 1); + paging_init(); + #ifdef CONFIG_OF_EARLY_FLATTREE #ifdef CONFIG_USE_BUILTIN_DTB unflatten_and_copy_device_tree(); @@ -330,8 +332,6 @@ void __init setup_arch(char **cmdline_p) #endif #endif - paging_init(); - /* Perform the machine specific initialisation */ if (likely(sh_mv.mv_setup)) sh_mv.mv_setup(cmdline_p);