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Merge patch series "list.h/treewide: get rid of no-op prefetch()"

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Rasmus Villemoes <ravi@prevas.dk> says:

While looking through list.h, I saw that the regular list_* helpers
(and one of the hlist_* ones) still contain the prefetch() that was
removed in linux 14 years ago. It doesn't do anything, but makes the
macros harder to read, so get rid of it, and the fallback, no-op
definition that they relied on. That requires removing a few uses
outside list.h as well.

checkpatch warns about some whitespace issues in list.h, but as I've
copied whole kerneldoc+#define blocks directly from the linux kernel,
I think it's better to just accept that so that we don't introduce
needless diffs. The "macro argument reuse" arguments should also be
ignored, as e.g. the "member" arguments are obviously always just bare
identifiers, and the "pos" arguments must be assigned to multiple
times.

Link: https://lore.kernel.org/r/20250507121246.518691-1-ravi@prevas.dk
This commit is contained in:
Tom Rini
2025-06-18 08:05:29 -06:00
parent 5d7e003248 1d19bbcb68
commit ce2a7fcbd5
6 changed files with 60 additions and 68 deletions
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1
drivers/net/mvpp2.c
View File

@@ -3876,7 +3876,6 @@ mvpp2_rxq_next_desc_get(struct mvpp2_rx_queue *rxq)
int rx_desc = rxq->next_desc_to_proc;
rxq->next_desc_to_proc = MVPP2_QUEUE_NEXT_DESC(rxq, rx_desc);
prefetch(rxq->descs + rxq->next_desc_to_proc);
return rxq->descs + rx_desc;
}

2
drivers/net/octeontx/nicvf_main.c
View File

@@ -279,8 +279,6 @@ int nicvf_cq_handler(struct nicvf *nic, void **ppkt, int *pkt_len)
cq_desc = (struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head);
cqe_head++;
cqe_head &= (cq->dmem.q_len - 1);
/* Initiate prefetch for next descriptor */
prefetch((struct cqe_rx_t *)GET_CQ_DESC(cq, cqe_head));
switch (cq_desc->cqe_type) {
case CQE_TYPE_RX:

1
drivers/usb/gadget/at91_udc.c
View File

@@ -228,7 +228,6 @@ static int write_fifo(struct at91_ep *ep, struct at91_request *req)
}
buf = req->req.buf + req->req.actual;
prefetch(buf);
total = req->req.length - req->req.actual;
if (ep->ep.maxpacket < total) {
count = ep->ep.maxpacket;

2
drivers/usb/musb-new/musb_core.c
View File

@@ -223,8 +223,6 @@ void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
struct musb *musb = hw_ep->musb;
void __iomem *fifo = hw_ep->fifo;
prefetch((u8 *)src);
dev_dbg(musb->controller, "%cX ep%d fifo %p count %d buf %p\n",
'T', hw_ep->epnum, fifo, len, src);