* Ingo Molnar <mingo@xxxxxxxxxx> wrote:
> > I also shouldn't have been using a u64 in a userspace API to begin with.
>
> Well, it's __u64 that we use in UAPIs, and they can be used just fine, as long
> as the structure's field alignments is managed explicitly, i.e. there's no
> automatic alignment padding done by the compiler.
Btw., what we should not have used in a modern user ABI are variable size
pointers:
struct {
void __user *_lower;
void __user *_upper;
} _addr_bnd;
we should have used constant size structure elements for that, such as __u64.
Had we done that, the pkeys change would not have been a problem either.
Is it too late to change that, is there any si_code=SEGV_BNDERR usage in
user-space?
Thanks,
Ingo
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