u-boot/include/tables_csum.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
 */

#ifndef _TABLES_CSUM_H_
#define _TABLES_CSUM_H_

static inline u8 table_compute_checksum(void *v, int len)
{
	u8 *bytes = v;
	u8 checksum = 0;
	int i;

	for (i = 0; i < len; i++)
		checksum -= bytes[i];

	return checksum;
}

#endif
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-07 05:58:06 +08:00			`/* SPDX-License-Identifier: GPL-2.0+ */`
x86: Move table csum into separate header We need the checksum function without all the other table functionality soon, so let's split it out into its own header file. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> 2016-08-19 07:23:22 +08:00			`/*`
			`* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>`
			`*/`

			`#ifndef _TABLES_CSUM_H_`
			`#define _TABLES_CSUM_H_`

			`static inline u8 table_compute_checksum(void *v, int len)`
			`{`
			`u8 *bytes = v;`
			`u8 checksum = 0;`
			`int i;`

			`for (i = 0; i < len; i++)`
			`checksum -= bytes[i];`

			`return checksum;`
			`}`

			`#endif`