326cf0f0f308 ("idr: fix top layer handling") enlarged the pa array.
But the additional "+1" space is only used in id-allocation, it is free
in other usage, (paa may point to the additional "+1" space, but not
dereference it).
so you can reuse it.
In the 3 functions your patch touched:
- struct idr_layer ***paa = &pa[0];
+ struct idr_layer ***paa = &pa[1];
I don't reject your patch, I had review it.
Reviewed-by: Lai Jiangshan <la...@cn.fujitsu.com>
The reason why I'm still muttering here is that I wish a simple solution
to fix the problem. And:
1) your patch also makes use of the additional "+1" @pa space: *++paa = p
2) your patch may slight enlarge the function body.
3) I think you patch reduces the readability a little although the idr code
itself is already shit.
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