Re: [PATCH] copy-file-range: work around Linux kernel bug

[Paul Eggert]

On 1/16/22 05:37, Pádraig Brady wrote:
> This looks like the replacement will only be used when the build system 
> uses an older kernel?
> If so this seems brittle. Consider the case where el7 rpms are being 
> built on
> central build systems with newer kernels.

It doesn't run any code on the newer kernels, right? It merely compiles. 
If the compilation environment says "this is being compiled for kernel 
5.3", surely the generated code can assume 5.3 or later.