[PATCH v7 6/7] arm64, jump label: optimize jump label implementation
From: Will Deacon <hidden>
Date: 2014-01-06 18:52:26
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lkml
On Sun, Dec 22, 2013 at 03:25:42PM +0000, Jiang Liu wrote:
Optimize jump label implementation for ARM64 by dynamically patching kernel text.
Almost!
quoted hunk ↗ jump to hunk
diff --git a/arch/arm64/include/asm/jump_label.h b/arch/arm64/include/asm/jump_label.h new file mode 100644 index 0000000..47cd130 --- /dev/null +++ b/arch/arm64/include/asm/jump_label.h@@ -0,0 +1,51 @@ +/* + * Copyright (C) 2013 Huawei Ltd. + * Author: Jiang Liu <liuj97@gmail.com> + * + * Based on arch/arm/include/asm/jump_label.h + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ +#ifndef _ASM_JUMP_LABEL_H +#define _ASM_JUMP_LABEL_H
It's actually prefixed with double-underscore in our other headers.
+#include <linux/types.h> + +#ifdef __KERNEL__ + +#define JUMP_LABEL_NOP_SIZE 4
I know you didn't like including asm/insn.h, but I don't see why that's such a problem. Does it cause a circular dependency or something? Will