RE: [PATCH v2] net: sctp: Don't use 64 kilobyte lookup table for four elements
From: David Laight
Date: Mon Sep 28 2015 - 10:13:51 EST
From: Neil Horman
> Sent: 28 September 2015 14:51
> On Mon, Sep 28, 2015 at 02:34:04PM +0200, Denys Vlasenko wrote:
> > Seemingly innocuous sctp_trans_state_to_prio_map array
> > is way bigger than it looks, since
> > "[SCTP_UNKNOWN] = 2" expands into "[0xffff] = 2" !
> > This patch replaces it with switch() statement.
What about just adding 1 (and masking) before indexing the array?
That might require a static inline function with a local static array.
Or define the array as (say)  and just mask the state before using
it as an index?
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