On Fri, Feb 19, 2021 at 02:22:01PM +0000, Matthew Wilcox wrote: > In the last decade, nobody's tried to fix it in mainline that I know of. > As I said, some vendors have tried to fix it in their NAS products, > but I don't know where to find that patch any more.
Arnd found it for me. https://sourceforge.net/projects/dsgpl/files/Synology%20NAS%20GPL%20Source/25426branch/alpine-source/linux-3.10.x-bsp.txz/download They've done a perfect job of making the source available while making it utterly dreadful to extract anything useful from. 16084 files changed, 1322769 insertions(+), 285257 deletions(-) It's full of gratuitous whitespace changes to files that definitely aren't used (arch/alpha? really?) and they've stripped out a lot of comments that they didn't need to touch. Forward porting a patch from 10 years ago wouldn't be easy, even if they hadn't tried very hard to obfuscate their patch. I don't think this will be a fruitful line of inquiry.