From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vineet Gupta Subject: [PATCH 4.14 10/44] ARCv2: [plat-hsdk]: Save accl reg pair by default Date: Mon, 23 Jul 2018 14:24:46 +0200 Message-Id: <20180723122437.939085285@linuxfoundation.org> In-Reply-To: <20180723122437.447870153@linuxfoundation.org> References: <20180723122437.447870153@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Vineet Gupta commit af1fc5baa724c63ce1733dfcf855bad5ef6078e3 upstream. This manifsted as strace segfaulting on HSDK because gcc was targetting the accumulator registers as GPRs, which kernek was not saving/restoring by default. Cc: stable@vger.kernel.org #4.14+ Signed-off-by: Vineet Gupta Signed-off-by: Greg Kroah-Hartman --- arch/arc/Kconfig | 2 +- arch/arc/plat-hsdk/Kconfig | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -408,7 +408,7 @@ config ARC_HAS_DIV_REM config ARC_HAS_ACCL_REGS bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)" - default n + default y help Depending on the configuration, CPU can contain accumulator reg-pair (also referred to as r58:r59). These can also be used by gcc as GPR so --- a/arch/arc/plat-hsdk/Kconfig +++ b/arch/arc/plat-hsdk/Kconfig @@ -7,5 +7,7 @@ menuconfig ARC_SOC_HSDK bool "ARC HS Development Kit SOC" + depends on ISA_ARCV2 + select ARC_HAS_ACCL_REGS select CLK_HSDK select RESET_HSDK