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IB/qib: Add prefetch for eager buffers 

Add a prefetch call when a packet has been stored.  The nature of the
prefetch is correctly determined by the alternatives mechanism.

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Mike Marciniszyn 2012-05-02 11:21:53 -04:00 committed by Roland Dreier
parent 8473c60314
commit cca195a168
1 changed files with 4 additions and 1 deletions
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5
drivers/infiniband/hw/qib/qib_driver.c
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@ -38,6 +38,7 @@
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/prefetch.h>
#include "qib.h"
@ -481,8 +482,10 @@ u32 qib_kreceive(struct qib_ctxtdata *rcd, u32 *llic, u32 *npkts)
etail = qib_hdrget_index(rhf_addr);
updegr = 1;
if (tlen > sizeof(*hdr) ||
etype >= RCVHQ_RCV_TYPE_NON_KD)
etype >= RCVHQ_RCV_TYPE_NON_KD) {
ebuf = qib_get_egrbuf(rcd, etail);
prefetch_range(ebuf, tlen - sizeof(*hdr));
}
}
if (!eflags) {
u16 lrh_len = be16_to_cpu(hdr->lrh[2]) << 2;