Comment on "memfd: improve userspace warnings for missing exec-related flags"

[Larry Finger]

Aleksa,

In commit 434ed3350f57 ("memfd: improve userspace warnings for missing 
exec-related flags"), your changing of pr_warn_once() to pr_info_ratelimited() 
was justified as it would "... incentivise userspace to switch to passing 
MFD_EXEC and MFD_NOEXEC_SEAL, we need to provide a warning on each attempt to 
call memfd_create() without the new flags."

It would be easier to get userspace to implement these flags if they were 
documented somewhere other than the kernel source. The man page for 
memfd_create() does not mention them at all.

Larry