From nobody Mon Feb 9 00:26:52 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5CCF93019B2 for ; Fri, 6 Feb 2026 13:02:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770382963; cv=none; b=XNZtrMEq+4NXWvMwme2gubmeHCpXHyQzvdX215kpolc0JXEbT+fhH89hNsM77Y/xXmI0rzbkZx5J4i/DA8poQ54vLeYiOWkINJjdXeb0V2sRSCKX+B7/XCw8Z/23/UO5shuaUiMICDhElSDT0wnXZg/+bWQN8e2i3om3ObohE9c= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770382963; c=relaxed/simple; bh=K0U9s1d9SAUAqd8e+w8kJvCum5qTFHSd7IwJFwm3VRM=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=rs58gSIRgMpYQNFRH2Ty3CX4LWihdDBUeNNW4UTqBIZlkzp2mfzzOrmDFjb+yrPfCCTAdJWwVvpNIr7d1B4RS1TBoqmlV83tWl2d56Skyu2Spf1/qwBaaqmzAW7OCCMU2d2aeEVoqFZapMdgsNQIYJNdABSrW6+LOFcoOtNu6Lc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=kgALjKzw; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=2JtHN8C1; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="kgALjKzw"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="2JtHN8C1" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1770382961; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=qMSJm3r9QghaqsOLATICPq8S+PcfLWjkhMCydwvJ6a0=; b=kgALjKzwuaFs+uVbmz5ktfLmKj1T86SzNiP+L4+huOrjYFx05ZK9NIfsf+cyZLpteOCUac SNw+8vl8HRnEpd8c3kNgdvCeQhhY70zWNX17bfwhL8W3GP8EHLXGeCnEMcRyEp5Q+UjVPV 9CvgRftllhdaMBL6a1lOicU8YOCLraFU+VI5FbuhzHLsKsmeFahnaR7m/myf1X5OvhOVse QaQqqw2iIIxJapVTXCK5ZAqIRL6Ov9uFp2lHxcBWiTkVzj/s3KvkfosRT53dQP0O1kPCsA fWTgS9tz+Ch/2WLkfQQaytgxbw2lnwKCdP/Nv/1QNx1JpIgTjhdH1ReSzRVR6A== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1770382961; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=qMSJm3r9QghaqsOLATICPq8S+PcfLWjkhMCydwvJ6a0=; b=2JtHN8C12cuuMCKVnHfL1P9yfxGYvomBX7Ze0oZ5uL/sYh8y76IAr06+TFIWkM4wuTc52y csTd5F3xxjkj+iCg== Date: Fri, 06 Feb 2026 14:02:38 +0100 Subject: [PATCH v2] ARM: Implement ARCH_HAS_CC_CAN_LINK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260206-cc-can-link-arm-v2-1-290cbf369fb6@linutronix.de> X-B4-Tracking: v=1; b=H4sIAAAAAAAC/2WNzQrCMBCEX6Xs2ZUkhPpz8j2khzXd2kVNZVNLp eTdjQVPHr8Z5psFEqtwgmO1gPIkSYZYwG0qCD3FK6O0hcEZVxtrHIaAgSLeJd6Q9IGeOXTUOjL soayeyp3Mq/HcFO4ljYO+14PJftOf6/DnmixavOz8nh0R1VSfSvUadYgyb1uGJuf8AXOxLo2yA AAA X-Change-ID: 20260102-cc-can-link-arm-4eecfad2a0e4 To: Russell King Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Arnd Bergmann , =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1770382960; l=1768; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=K0U9s1d9SAUAqd8e+w8kJvCum5qTFHSd7IwJFwm3VRM=; b=wzWwwQZ4H1aptd55kehWA0ChSnUrfXpCqZwXEEKGpya4F5ak1ELXWW0zW4bFYUIN4gSqdIY8T LY+HisbnYmaDcEJnPU9FiTxn88/le13yQqztP3kvXoCuuMY97eOhUxZ X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= The generic CC_CAN_LINK detection does not handle different byte orders. This may lead to userprogs which are not actually runnable on the target kernel. Use architecture-specific logic supporting byte orders instead. Signed-off-by: Thomas Wei=C3=9Fschuh --- Changes in v2: - Handle BE8 vs BE32 platforms - Link to v1: https://lore.kernel.org/r/20260109-cc-can-link-arm-v1-1-b748e= 2aaa6a6@linutronix.de --- arch/arm/Kconfig | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index fa83c040ee2d..d5cb85d82dad 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -6,6 +6,7 @@ config ARM select ARCH_CORRECT_STACKTRACE_ON_KRETPROBE if HAVE_KRETPROBES && FRAME_P= OINTER && !ARM_UNWIND select ARCH_HAS_BINFMT_FLAT select ARCH_HAS_CACHE_LINE_SIZE if OF + select ARCH_HAS_CC_CAN_LINK select ARCH_HAS_CPU_CACHE_ALIASING select ARCH_HAS_CPU_FINALIZE_INIT if MMU select ARCH_HAS_CURRENT_STACK_POINTER @@ -1715,6 +1716,18 @@ config KERNEL_MODE_NEON =20 endmenu =20 +config ARCH_CC_CAN_LINK + bool + default $(cc_can_link_user,-mlittle-endian) if CPU_LITTLE_ENDIAN + default $(cc_can_link_user,-mbig-endian -mbe8) if CPU_ENDIAN_BE8 + default $(cc_can_link_user,-mbig-endian -mbe32) if CPU_ENDIAN_BE32 + +config ARCH_USERFLAGS + string + default "-mlittle-endian" if CPU_LITTLE_ENDIAN + default "-mbig-endian -mbe8" if CPU_ENDIAN_BE8 + default "-mbig-endian -mbe32" if CPU_ENDIAN_BE32 + menu "Power management options" =20 source "kernel/power/Kconfig" --- base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8 change-id: 20260102-cc-can-link-arm-4eecfad2a0e4 Best regards, --=20 Thomas Wei=C3=9Fschuh