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Date: Tue, 05 May 2020 15:49:43 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, "Paul E. McKenney" <paulmck@...nel.org>,
Andy Lutomirski <luto@...nel.org>,
Alexandre Chartre <alexandre.chartre@...cle.com>,
Frederic Weisbecker <frederic@...nel.org>,
Paolo Bonzini <pbonzini@...hat.com>,
Sean Christopherson <sean.j.christopherson@...el.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Petr Mladek <pmladek@...e.com>,
Steven Rostedt <rostedt@...dmis.org>,
Joel Fernandes <joel@...lfernandes.org>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Juergen Gross <jgross@...e.com>,
Brian Gerst <brgerst@...il.com>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Josh Poimboeuf <jpoimboe@...hat.com>,
Will Deacon <will@...nel.org>
Subject: [patch V4 part 4 17/24] x86/entry/64: Remove error code clearing from
#DB and #MCE ASM stub
The C entry points do not expect an error code.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/entry/entry_64.S | 1 -
1 file changed, 1 deletion(-)
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -643,7 +643,6 @@ SYM_CODE_START(\asmsym)
.endif
movq %rsp, %rdi /* pt_regs pointer */
- xorl %esi, %esi /* Clear the error code */
.if \vector == X86_TRAP_DB
subq $DB_STACK_OFFSET, CPU_TSS_IST(IST_INDEX_DB)
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