Re: [PATCH 1/3] mm/sparse: Clean up the obsolete code comment

[Matthew Wilcox]

On Wed, Mar 20, 2019 at 02:36:58PM +0200, Mike Rapoport wrote:
> There are more than a thousand -EEXIST in the kernel, I really doubt all of
> them mean "File exists" ;-)

And yet that's what the user will see if it's ever printed with perror()
or similar.  We're pretty bad at choosing errnos; look how abused
ENOSPC is:

$ errno ENOSPC
ENOSPC 28 No space left on device

net/sunrpc/auth_gss/gss_rpc_xdr.c:              return -ENOSPC;

... that's an authentication failure, not "I've run out of disc space".