On Fri, Sep 20, 2019 at 8:11 PM Al Viro wrote:
>
> My apologies ;-/ Correct diff follows:
This is similar to what we do for the regular list_add(), so I have no
objections to the micro-optimization.
Of course, for list_add() we do it by using a helper function and
passing those prev/next
On Sat, Sep 21, 2019 at 12:12:33AM +0100, Al Viro wrote:
> Neither hlist_add_before() nor hlist_add_behind() should ever
> be called with both arguments pointing to the same hlist_node.
> However, gcc doesn't know that, so it ends up with pointless reloads.
> AFAICS, the following generates
Neither hlist_add_before() nor hlist_add_behind() should ever
be called with both arguments pointing to the same hlist_node.
However, gcc doesn't know that, so it ends up with pointless reloads.
AFAICS, the following generates better code, is obviously equivalent
in case when arguments are
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