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Sun, 18 Jan 2026 18:41:43 +0000 (UTC) Message-ID: <4c70fe51-56c3-4292-9eda-f0f4535718fe@mac.com> Date: Sun, 18 Jan 2026 12:41:42 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] powerpc: Add reloc_offset() to font bitmap pointer used for bootx_printf() To: Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Christophe Leroy , Finn Thain Cc: Stan Johnson , "Dr. David Alan Gilbert" , Benjamin Herrenschmidt , stable@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org References: <22b3b247425a052b079ab84da926706b3702c2c7.1762731022.git.fthain@linux-m68k.org> <176680916368.22434.818943585854783800.b4-ty@linux.ibm.com> Content-Language: en-US From: Cedar Maxwell In-Reply-To: <176680916368.22434.818943585854783800.b4-ty@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Info: v=2.4 cv=XrP3+FF9 c=1 sm=1 tr=0 ts=696d2969 cx=c_apl:c_apl_out:c_pps a=9OgfyREA4BUYbbCgc0Y0oA==:117 a=9OgfyREA4BUYbbCgc0Y0oA==:17 a=IkcTkHD0fZMA:10 a=vUbySO9Y5rIA:10 a=x7bEGLp0ZPQA:10 a=fPXO8E_wjBMA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=JXPk7LadgWurrYbJNRoA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMTE4MDE2NCBTYWx0ZWRfXwERN4npg9hhe QcSRTksUbDg8c5Aw8/AqjSopXXaAJ0IBhSDzpPGLBk39SaKa+6Yshw4eLS2GY57C/aZbh6SYq8M cgYuZqXW/WGKH6k7Srg5FNe1jK49aY9oAvVAF6igfb347JBnRsgN2ZIWmvpc6g+QT3gzusEFntS dOUbbLq7G1rUv0scG3vSUNQYI5rMLdJyz81qyJTeunI9+Zotbj37PwcIhuhQXa93Py8rTYVOf6t UCiC1q5u0666KCqRIFvcl2XEyMhguV44R5MPCVuRd3Mb16D9W/UX7x2J4j121FS7vKO9FgpsaPt vBOKSZGQDy+W3fNQPC4 X-Proofpoint-GUID: _RSHnb2iLwpQezYNpt68GTNW8-_s-jgY X-Proofpoint-ORIG-GUID: _RSHnb2iLwpQezYNpt68GTNW8-_s-jgY X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2026-01-17_03,2026-01-15_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 adultscore=0 suspectscore=0 mlxscore=0 malwarescore=0 spamscore=0 mlxlogscore=999 clxscore=1011 bulkscore=0 classifier=spam authscore=0 adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2601180164 X-JNJ: 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 Maddy (and everyone else), Thank you all for your hard work in solving this issue! Cedar Maxwell On 12/26/25 10:23 PM, Madhavan Srinivasan wrote: > On Mon, 10 Nov 2025 10:30:22 +1100, Finn Thain wrote: >> Since Linux v6.7, booting using BootX on an Old World PowerMac produces >> an early crash. Stan Johnson writes, "the symptoms are that the screen >> goes blank and the backlight stays on, and the system freezes (Linux >> doesn't boot)." >> >> Further testing revealed that the failure can be avoided by disabling >> CONFIG_BOOTX_TEXT. Bisection revealed that the regression was caused by >> a change to the font bitmap pointer that's used when btext_init() begins >> painting characters on the display, early in the boot process. >> >> [...] > Applied to powerpc/fixes. > > [1/1] powerpc: Add reloc_offset() to font bitmap pointer used for bootx_printf() > https://git.kernel.org/powerpc/c/b94b73567561642323617155bf4ee24ef0d258fe > > cheers