On Thu, Jul 15, 2021 at 09:08:06PM +0800, Gao Xiang wrote:
> 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@xxxxxxxxx/
> Fixes: defcc2b5e54a ("lib/lz4: explicitly support in-place decompression") # 5.4.y
> Reported-by: kernel test robot <lkp@xxxxxxxxx>
> Signed-off-by: Gao Xiang <hsiangkao@xxxxxxxxxxxxxxxxx>
> ---
> v2:
> "just submit the fix and say _why_ this is not an upstream
> commit, do not attempt to emulate an upstream commit like
> your change did." as Greg suggested...
Thanks, much better, now queued up.
greg k-h
