862e1aef2b
This is _not_ an upstream commit and just for 5.4.y only.
kernel test robot reported a 5.4.y build issue found by randconfig [1]
after backporting commit 89b158635ad7 ("lib/lz4: explicitly support
in-place decompression"") due to "undefined reference to `memmove'".
However, upstream and 5.10 LTS seem fine. After digging further,
I found commit a510b616131f ("MIPS: Add support for ZSTD-compressed
kernels") introduced memmove() occasionally and it has been included
since v5.10.
This partially cherry-picks the memmove() part of commit a510b616131f
to fix the reported build regression since we don't need the whole
patch for 5.4 LTS at all.
[1] https://lore.kernel.org/r/202107070120.6dOj1kB7-lkp@intel.com/
Fixes: defcc2b5e5 ("lib/lz4: explicitly support in-place decompression") # 5.4.y
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
47 lines
755 B
C
47 lines
755 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* arch/mips/boot/compressed/string.c
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*
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* Very small subset of simple string routines
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*/
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#include <linux/compiler_attributes.h>
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#include <linux/types.h>
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void *memcpy(void *dest, const void *src, size_t n)
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{
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int i;
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const char *s = src;
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char *d = dest;
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for (i = 0; i < n; i++)
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d[i] = s[i];
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return dest;
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}
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void *memset(void *s, int c, size_t n)
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{
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int i;
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char *ss = s;
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for (i = 0; i < n; i++)
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ss[i] = c;
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return s;
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}
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void * __weak memmove(void *dest, const void *src, size_t n)
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{
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unsigned int i;
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const char *s = src;
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char *d = dest;
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if ((uintptr_t)dest < (uintptr_t)src) {
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for (i = 0; i < n; i++)
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d[i] = s[i];
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} else {
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for (i = n; i > 0; i--)
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d[i - 1] = s[i - 1];
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}
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return dest;
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}
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