From: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Date: Thu, 15 Jun 2017 18:04:44 +0900 > There's a fair number of SHASH_DESC_ON_STACK users, are all the others > safe for some random reason that just happens to be about code > generation? Did people actually verify that? I looked at the code generated in every case. As a side note, ext4 does something similar with a private implementation, but it doesn't use something the evaluates to an alloca. Instead it uses a fixed 4-byte size for the shash context value in the on-stack declaration. We can tidy it up with abstraction macros as a follow-up, thanks for the suggestion. I'll look into it.
