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From: Greg Kroah-Hartman <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>,
	Thomas Gleixner <tglx@linutronix.de>,
	Nick Desaulniers <ndesaulniers@google.com>,
	Linus Walleij <linus.walleij@linaro.org>,
	"Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Subject: [PATCH 4.14 30/30] ARM: 9122/1: select HAVE_FUTEX_CMPXCHG
Date: Mon, 25 Oct 2021 21:14:50 +0200	[thread overview]
Message-ID: <20211025190929.455629220@linuxfoundation.org> (raw)
In-Reply-To: <20211025190922.089277904@linuxfoundation.org>

From: Nick Desaulniers <ndesaulniers@google.com>

commit 9d417cbe36eee7afdd85c2e871685f8dab7c2dba upstream.

tglx notes:
  This function [futex_detect_cmpxchg] is only needed when an
  architecture has to runtime discover whether the CPU supports it or
  not.  ARM has unconditional support for this, so the obvious thing to
  do is the below.

Fixes linkage failure from Clang randconfigs:
kernel/futex.o:(.text.fixup+0x5c): relocation truncated to fit: R_ARM_JUMP24 against `.init.text'
and boot failures for CONFIG_THUMB2_KERNEL.

Link: https://github.com/ClangBuiltLinux/linux/issues/325

Comments from Nick Desaulniers:

 See-also: 03b8c7b623c8 ("futex: Allow architectures to skip
 futex_atomic_cmpxchg_inatomic() test")

Reported-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Nathan Chancellor <nathan@kernel.org>
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Cc: stable@vger.kernel.org # v3.14+
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 arch/arm/Kconfig |    1 +
 1 file changed, 1 insertion(+)

--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -65,6 +65,7 @@ config ARM
 	select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL)
 	select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL)
 	select HAVE_FUNCTION_TRACER if (!XIP_KERNEL)
+	select HAVE_FUTEX_CMPXCHG if FUTEX
 	select HAVE_GCC_PLUGINS
 	select HAVE_GENERIC_DMA_COHERENT
 	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))



  parent reply	other threads:[~2021-10-25 19:25 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-25 19:14 [PATCH 4.14 00/30] 4.14.253-rc1 review Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 01/30] btrfs: always wait on ordered extents at fsync time Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 02/30] ARM: dts: at91: sama5d2_som1_ek: disable ISC node by default Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 03/30] xtensa: xtfpga: use CONFIG_USE_OF instead of CONFIG_OF Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 04/30] xtensa: xtfpga: Try software restart before simulating CPU reset Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 05/30] NFSD: Keep existing listeners on portlist error Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 06/30] netfilter: ipvs: make global sysctl readonly in non-init netns Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 07/30] NIOS2: irqflags: rename a redefined register name Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 08/30] can: rcar_can: fix suspend/resume Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 09/30] can: peak_usb: pcan_usb_fd_decode_status(): fix back to ERROR_ACTIVE state notification Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 10/30] can: peak_pci: peak_pci_remove(): fix UAF Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 11/30] ocfs2: fix data corruption after conversion from inline format Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 12/30] ocfs2: mount fails with buffer overflow in strlen Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 13/30] elfcore: correct reference to CONFIG_UML Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 14/30] vfs: check fd has read access in kernel_read_file_from_fd() Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 15/30] ALSA: usb-audio: Provide quirk for Sennheiser GSP670 Headset Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 16/30] ASoC: DAPM: Fix missing kctl change notifications Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 17/30] nfc: nci: fix the UAF of rf_conn_info object Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 18/30] isdn: cpai: check ctr->cnr to avoid array index out of bound Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 19/30] netfilter: Kconfig: use default y instead of m for bool config option Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 20/30] btrfs: deal with errors when checking if a dir entry exists during log replay Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 21/30] net: stmmac: add support for dwmac 3.40a Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 22/30] ARM: dts: spear3xx: Fix gmac node Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 23/30] isdn: mISDN: Fix sleeping function called from invalid context Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 24/30] platform/x86: intel_scu_ipc: Update timeout value in comment Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 25/30] ALSA: hda: avoid write to STATESTS if controller is in reset Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 26/30] scsi: core: Fix shost->cmd_per_lun calculation in scsi_add_host_with_dma() Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 27/30] usbnet: sanity check for maxpacket Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 28/30] net: mdiobus: Fix memory leak in __mdiobus_register Greg Kroah-Hartman
2021-10-25 19:14 ` [PATCH 4.14 29/30] tracing: Have all levels of checks prevent recursion Greg Kroah-Hartman
2021-10-25 19:14 ` Greg Kroah-Hartman [this message]
2021-10-26  9:20 ` [PATCH 4.14 00/30] 4.14.253-rc1 review Jon Hunter
2021-10-26 13:30 ` Naresh Kamboju
2021-10-26 19:15 ` Guenter Roeck

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