Re: [PATCH] [RFC] Remove bdflush syscall stub

[Cyril Hrubis]

Hi!
> >> > I've tested the patch on i386. Before the patch calling bdflush() with
> >> > attempt to tune a variable returned 0 and after the patch the syscall
> >> > fails with EINVAL.
> >> 
> >> Should be ENOSYS, doesn't it?
> >
> > My bad, the LTP syscall wrapper handles ENOSYS and produces skipped
> > results based on that.
> >
> > EINVAL is what you get for not yet implemented syscalls, i.e. new
> > syscall on old kernel.
> 
> EINVAL?  Is that a bdflush-specific thing, test-specific, or is itmore
> general?
> 
> glibc has fallback paths that test for ENOSYS only.  EINVAL will be
> passed to the application, skipping fallback.  For missing system calls,
> this is not what we want.

The syscall returns ENOSYS after this change, sorry for the confusion.

-- 
Cyril Hrubis
chrubis@xxxxxxx