page_pool: check for DMA sync shortcut earlier

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We can save a couple more function calls in the Page Pool code if we
check for dma_need_sync() earlier, just when we test pp->p.dma_sync.
Move both these checks into an inline wrapper and call the PP wrapper
over the generic DMA sync function only when both are true.
You can't cache the result of dma_need_sync() in &page_pool, as it may
change anytime if an SWIOTLB buffer is allocated or mapped.

Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Alexander Lobakin 2024-05-07 13:20:25 +02:00 • committed by Christoph Hellwig

parent 403f11ac9a

commit 4321de4497

1 changed files with 19 additions and 14 deletions

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net/core/page_pool.c

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