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Peter Anvin" , Andy Lutomirski , Alexandre Chartre , Peter Zijlstra , Zhenzhong Duan , "Eric W. Biederman" , Jann Horn , Dave Hansen Subject: [PATCH 4/5] x86/entry: remove unused sync_regs() Date: Wed, 27 May 2020 07:31:06 +0000 Message-Id: <20200527073107.2127-5-laijs@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200527073107.2127-1-laijs@linux.alibaba.com> References: <20200527073107.2127-1-laijs@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org No more users. Signed-off-by: Lai Jiangshan --- arch/x86/include/asm/traps.h | 1 - arch/x86/kernel/traps.c | 13 ------------- 2 files changed, 14 deletions(-) diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h index f5a2e438a878..20b9db7a1d49 100644 --- a/arch/x86/include/asm/traps.h +++ b/arch/x86/include/asm/traps.h @@ -21,7 +21,6 @@ asmlinkage void xen_page_fault(void); dotraplinkage void do_page_fault(struct pt_regs *regs, unsigned long error_code, unsigned long address); #ifdef CONFIG_X86_64 -asmlinkage __visible notrace struct pt_regs *sync_regs(struct pt_regs *eregs); asmlinkage __visible notrace struct bad_iret_stack *fixup_bad_iret(struct bad_iret_stack *s); void __init trap_init(void); diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 3bef95934644..8291f84933ff 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -642,19 +642,6 @@ DEFINE_IDTENTRY_RAW(exc_int3) } #ifdef CONFIG_X86_64 -/* - * Help handler running on a per-cpu (IST or entry trampoline) stack - * to switch to the normal thread stack if the interrupted code was in - * user mode. The actual stack switch is done in entry_64.S - */ -asmlinkage __visible noinstr struct pt_regs *sync_regs(struct pt_regs *eregs) -{ - struct pt_regs *regs = (struct pt_regs *)this_cpu_read(cpu_current_top_of_stack) - 1; - if (regs != eregs) - *regs = *eregs; - return regs; -} - struct bad_iret_stack { void *error_entry_ret; struct pt_regs regs; -- 2.20.1