Linus Torvalds writes: (Summary) For 32bit long, there is no change.
Ok, sorry for the delay, I only got back to this now because the merge window is calming down (famous last words - sometimes Friday ends up being busy, but I might decide that it's too late if somebody sends me an annoying late pull request now).
an annoying late pull request now).
And after having looked more at it, I take back all my complaints about the patch, you were right and I was mis-reading things or just being stupid.
being stupid.
I also don't worry too much about the possible performance impact of this on 64-bit, since most architectures that actually care about performance end up not using this very much (the dcache code is the most performance-critical, but the word-at-a-time case uses its own hashing anyway).
hashing anyway).
So this ends up being mostly used for filesystems that do their own degraded hashing (usually because they want a case-insensitive comparison function).
comparison function).
A _tiny_ worry r
Ok, sorry for the delay, I only got back to this now because the merge window is calming down (famous last words - sometimes Friday ends up being busy, but I might decide that it's too late if somebody sends me an annoying late pull request now).
an annoying late pull request now).
And after having looked more at it, I take back all my complaints about the patch, you were right and I was mis-reading things or just being stupid.
being stupid.
I also don't worry too much about the possible performance impact of this on 64-bit, since most architectures that actually care about performance end up not using this very much (the dcache code is the most performance-critical, but the word-at-a-time case uses its own hashing anyway).
hashing anyway).
So this ends up being mostly used for filesystems that do their own degraded hashing (usually because they want a case-insensitive comparison function).
comparison function).
A _tiny_ worry r