Re: [PATCH 2/2] mm,hugetlb: simplify error handling in hugetlb_cow()

[David Rientjes]

On Tue, 1 Jul 2014, Davidlohr Bueso wrote:

> When returning from hugetlb_cow(), we always (1) put back the refcount
> for each referenced page -- always 'old', and 'new' if allocation was
> successful. And (2) retake the page table lock right before returning,
> as the callers expects. This logic can be simplified and encapsulated,
> as proposed in this patch. In addition to cleaner code, we also shave
> a few bytes off in instruction text:
> 
>    text    data     bss     dec     hex filename
>   28399     462   41328   70189   1122d mm/hugetlb.o-baseline
>   28367     462   41328   70157   1120d mm/hugetlb.o-patched
> 
> Passes libhugetlbfs testcases.
> 
> Signed-off-by: Davidlohr Bueso <davidlohr@xxxxxx>

Acked-by: David Rientjes <rientjes@xxxxxxxxxx>

Not sure the extra indirection is clearer code, but I can't argue with the 
difference in object size.
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