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SubjectRe: [PATCH 1/2] avoid OPEN_MAX in SCM_MAX_FD
> > -#define SCM_MAX_FD	(OPEN_MAX-1)
> > +#define SCM_MAX_FD (NR_OPEN-1)
> This is a bad idea. [...]

Ok. My only agenda is to get rid of OPEN_MAX.
I then propose the following instead.


The OPEN_MAX constant is an arbitrary number with no useful relation to
anything. Nothing should be using it. SCM_MAX_FD is just an arbitrary
constant and it should be clear that its value is chosen in net/scm.h
and not actually derived from anything else meaningful in the system.

Signed-off-by: Roland McGrath <>
include/net/scm.h | 5 ++---
1 files changed, 2 insertions(+), 3 deletions(-)
diff --git a/include/net/scm.h b/include/net/scm.h
index 5637d5e..2240690 100644
--- a/include/net/scm.h
+++ b/include/net/scm.h
@@ -8,7 +8,7 @@
/* Well, we should have at least one descriptor open
* to accept passed FDs 8)
-#define SCM_MAX_FD (OPEN_MAX-1)
+#define SCM_MAX_FD 255

struct scm_fp_list
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