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From: gregkh@linuxfoundation.org
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Will Deacon <will@kernel.org>,
	Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Subject: [PATCH 5.11 14/36] arm64: Make CPU_BIG_ENDIAN depend on ld.bfd or ld.lld 13.0.0+
Date: Wed, 10 Mar 2021 14:23:27 +0100	[thread overview]
Message-ID: <20210310132320.967051914@linuxfoundation.org> (raw)
In-Reply-To: <20210310132320.510840709@linuxfoundation.org>

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

From: Nathan Chancellor <nathan@kernel.org>

commit e9c6deee00e9197e75cd6aa0d265d3d45bd7cc28 upstream

Similar to commit 28187dc8ebd9 ("ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN
depends on !LD_IS_LLD"), ld.lld prior to 13.0.0 does not properly
support aarch64 big endian, leading to the following build error when
CONFIG_CPU_BIG_ENDIAN is selected:

ld.lld: error: unknown emulation: aarch64linuxb

This has been resolved in LLVM 13. To avoid errors like this, only allow
CONFIG_CPU_BIG_ENDIAN to be selected if using ld.bfd or ld.lld 13.0.0
and newer.

While we are here, the indentation of this symbol used spaces since its
introduction in commit a872013d6d03 ("arm64: kconfig: allow
CPU_BIG_ENDIAN to be selected"). Change it to tabs to be consistent with
kernel coding style.

Link: https://github.com/ClangBuiltLinux/linux/issues/380
Link: https://github.com/ClangBuiltLinux/linux/issues/1288
Link: https://github.com/llvm/llvm-project/commit/7605a9a009b5fa3bdac07e3131c8d82f6d08feb7
Link: https://github.com/llvm/llvm-project/commit/eea34aae2e74e9b6fbdd5b95f479bc7f397bf387
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Link: https://lore.kernel.org/r/20210209005719.803608-1-nathan@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm64/Kconfig |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -952,8 +952,9 @@ choice
 	  that is selected here.
 
 config CPU_BIG_ENDIAN
-       bool "Build big-endian kernel"
-       help
+	bool "Build big-endian kernel"
+	depends on !LD_IS_LLD || LLD_VERSION >= 130000
+	help
 	  Say Y if you plan on running a kernel with a big-endian userspace.
 
 config CPU_LITTLE_ENDIAN



  parent reply	other threads:[~2021-03-10 13:25 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-10 13:23 [PATCH 5.11 00/36] 5.11.6-rc1 review gregkh
2021-03-10 13:23 ` [PATCH 5.11 01/36] ACPICA: Fix race in generic_serial_bus (I2C) and GPIO op_region parameter handling gregkh
2021-03-10 13:23 ` [PATCH 5.11 02/36] io_uring: fix inconsistent lock state gregkh
2021-03-10 13:23 ` [PATCH 5.11 03/36] io_uring: deduplicate core cancellations sequence gregkh
2021-03-10 13:23 ` [PATCH 5.11 04/36] io_uring: unpark SQPOLL thread for cancelation gregkh
2021-03-10 13:23 ` [PATCH 5.11 05/36] io_uring: deduplicate failing task_work_add gregkh
2021-03-10 13:23 ` [PATCH 5.11 06/36] fs: provide locked helper variant of close_fd_get_file() gregkh
2021-03-10 13:23 ` [PATCH 5.11 07/36] io_uring: get rid of intermediate IORING_OP_CLOSE stage gregkh
2021-03-10 13:23 ` [PATCH 5.11 08/36] io_uring/io-wq: kill off now unused IO_WQ_WORK_NO_CANCEL gregkh
2021-03-10 13:23 ` [PATCH 5.11 09/36] io_uring/io-wq: return 2-step work swap scheme gregkh
2021-03-10 13:23 ` [PATCH 5.11 10/36] io_uring: dont take uring_lock during iowq cancel gregkh
2021-03-10 13:23 ` [PATCH 5.11 11/36] media: cedrus: Remove checking for required controls gregkh
2021-03-10 13:23 ` [PATCH 5.11 12/36] nvme-pci: mark Kingston SKC2000 as not supporting the deepest power state gregkh
2021-03-10 13:23 ` [PATCH 5.11 13/36] parisc: Enable -mlong-calls gcc option with CONFIG_COMPILE_TEST gregkh
2021-03-10 13:23 ` gregkh [this message]
2021-03-10 13:23 ` [PATCH 5.11 15/36] btrfs: export and rename qgroup_reserve_meta gregkh
2021-03-10 13:23 ` [PATCH 5.11 16/36] btrfs: dont flush from btrfs_delayed_inode_reserve_metadata gregkh
2021-03-10 13:23 ` [PATCH 5.11 17/36] iommu/amd: Fix sleeping in atomic in increase_address_space() gregkh
2021-03-10 13:23 ` [PATCH 5.11 18/36] scsi: ufs-mediatek: Enable UFSHCI_QUIRK_SKIP_MANUAL_WB_FLUSH_CTRL gregkh
2021-03-10 13:23 ` [PATCH 5.11 19/36] scsi: ufs: Add a quirk to permit overriding UniPro defaults gregkh
2021-03-10 13:23 ` [PATCH 5.11 20/36] misc: eeprom_93xx46: Add quirk to support Microchip 93LC46B eeprom gregkh
2021-03-10 13:23 ` [PATCH 5.11 21/36] scsi: ufs: Introduce a quirk to allow only page-aligned sg entries gregkh
2021-03-10 13:23 ` [PATCH 5.11 22/36] scsi: ufs: ufs-exynos: Apply vendor-specific values for three timeouts gregkh
2021-03-10 13:23 ` [PATCH 5.11 23/36] scsi: ufs: ufs-exynos: Use UFSHCD_QUIRK_ALIGN_SG_WITH_PAGE_SIZE gregkh
2021-03-10 13:23 ` [PATCH 5.11 24/36] drm/msm/a5xx: Remove overwriting A5XX_PC_DBG_ECO_CNTL register gregkh
2021-03-10 13:23 ` [PATCH 5.11 25/36] mmc: sdhci-of-dwcmshc: set SDHCI_QUIRK2_PRESET_VALUE_BROKEN gregkh
2021-03-10 13:23 ` [PATCH 5.11 26/36] HID: i2c-hid: Add I2C_HID_QUIRK_NO_IRQ_AFTER_RESET for ITE8568 EC on Voyo Winpad A15 gregkh
2021-03-10 13:23 ` [PATCH 5.11 27/36] ALSA: usb-audio: Add DJM750 to Pioneer mixer quirk gregkh
2021-03-10 13:23 ` [PATCH 5.11 28/36] ALSA: usb-audio: add mixer quirks for Pioneer DJM-900NXS2 gregkh
2021-03-10 13:23 ` [PATCH 5.11 29/36] HID: ite: Enable QUIRK_TOUCHPAD_ON_OFF_REPORT on Acer Aspire Switch 10E gregkh
2021-03-10 13:23 ` [PATCH 5.11 30/36] PCI: cadence: Retrain Link to work around Gen2 training defect gregkh
2021-03-10 13:23 ` [PATCH 5.11 31/36] ASoC: Intel: sof_sdw: reorganize quirks by generation gregkh
2021-03-10 13:23 ` [PATCH 5.11 32/36] ASoC: Intel: sof_sdw: add quirk for HP Spectre x360 convertible gregkh
2021-03-10 13:23 ` [PATCH 5.11 33/36] scsi: ufs: Fix a duplicate dev quirk number gregkh
2021-03-10 13:23 ` [PATCH 5.11 34/36] KVM: SVM: Clear the CR4 register on reset gregkh
2021-03-10 13:23 ` [PATCH 5.11 35/36] nvme-pci: mark Seagate Nytro XM1440 as QUIRK_NO_NS_DESC_LIST gregkh
2021-03-10 13:23 ` [PATCH 5.11 36/36] nvme-pci: add quirks for Lexar 256GB SSD gregkh
2021-03-10 21:59 ` [PATCH 5.11 00/36] 5.11.6-rc1 review Shuah Khan
2021-03-11 17:37   ` Greg KH
2021-03-10 23:53 ` Guenter Roeck
2021-03-11 17:37   ` Greg KH
2021-03-11  3:21 ` Naresh Kamboju
2021-03-11 17:38   ` Greg Kroah-Hartman
2021-03-11  4:09 ` Ross Schmidt
2021-03-11 17:39   ` Greg KH
2021-03-11  7:59 ` Jon Hunter
2021-03-11 17:39   ` Greg KH

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