# \[PATCH\] lib/decompress\_unxz.c: removing all memory helper functions

- From: H. Peter Anvin \<hpa@zytor.com\>
- Date: 2012-05-24 17:31:46 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2012/05/3869807
- Thread: https://ratatoskr.run/linux-arm-kernel/2012/05/3869736/t.md

```text
On 05/24/2012 10:26 AM, Joe Perches wrote:
> On Thu, 2012-05-24 at 10:03 -0600, T Makphaibulchoke wrote:
>> The patch cleans up the file lib/decompress_unxz.c by removing all memory
>> helper functions, e.g., memmove.  By doing so, any architecture's preboot
>> environment supporting the XZ decompression needs to define its own copy of
>> any of the missing memory helper functions.
> 
> Perhaps a silly question, but why not use
> the __builtin variants?

For a lot of cases the __builtin variants just generate a call to the
expected out-of-line function, so you need it anyway.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.
```