83d290c56f
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>
39 lines
727 B
C
39 lines
727 B
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* BTRFS filesystem implementation for U-Boot
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*
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* 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
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*/
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#include "btrfs.h"
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#include <u-boot/crc.h>
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#include <asm/unaligned.h>
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static u32 btrfs_crc32c_table[256];
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void btrfs_hash_init(void)
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{
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static int inited = 0;
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if (!inited) {
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crc32c_init(btrfs_crc32c_table, 0x82F63B78);
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inited = 1;
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}
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}
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u32 btrfs_crc32c(u32 crc, const void *data, size_t length)
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{
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return crc32c_cal(crc, (const char *) data, length,
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btrfs_crc32c_table);
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}
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u32 btrfs_csum_data(char *data, u32 seed, size_t len)
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{
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return btrfs_crc32c(seed, data, len);
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}
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void btrfs_csum_final(u32 crc, void *result)
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{
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put_unaligned(cpu_to_le32(~crc), (u32 *)result);
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}
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