diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2025-11-26 09:57:37 +0200 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2025-11-27 03:41:27 -0500 |
| commit | 155c9971fa88a6655431476f024566fcd9ddcdb6 (patch) | |
| tree | f0394916a3d277995687c631ae584c58001a01aa | |
| parent | f37e2868792335f2e8bbdcc02ebbb4830453f83c (diff) | |
RDMA/bng_re: Remove prefetch instruction
The prefetch instruction is meant to speed up access to memory referenced
by its address argument. In the bng_re code path, it has no effect,
because the pointer refers to a function that is executed immediately
afterward.
The issue was identified due to the following kbuild compilation error:
drivers/infiniband/hw/bng_re/bng_fw.c: In function 'bng_re_creq_irq':
drivers/infiniband/hw/bng_re/bng_fw.c:278:9: error: implicit
declaration of function 'prefetch' [-Wimplicit-function-declaration]
278 | prefetch(bng_re_get_qe(hwq, sw_cons, NULL));
| ^~~~~~~~
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511260607.Kuxn4NnN-lkp@intel.com/
Fixes: 4f830cd8d7fe ("RDMA/bng_re: Add infrastructure for enabling Firmware channel")
Link: https://patch.msgid.link/20251126-remove-prefetch-v1-1-fcac22007ea7@nvidia.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
| -rw-r--r-- | drivers/infiniband/hw/bng_re/bng_fw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/bng_re/bng_fw.c b/drivers/infiniband/hw/bng_re/bng_fw.c index 803610fb9c58..7d9539113cf5 100644 --- a/drivers/infiniband/hw/bng_re/bng_fw.c +++ b/drivers/infiniband/hw/bng_re/bng_fw.c @@ -525,7 +525,7 @@ static irqreturn_t bng_re_creq_irq(int irq, void *dev_instance) hwq = &creq->hwq; /* Prefetch the CREQ element */ sw_cons = HWQ_CMP(hwq->cons, hwq); - prefetch(bng_re_get_qe(hwq, sw_cons, NULL)); + bng_re_get_qe(hwq, sw_cons, NULL); tasklet_schedule(&creq->creq_tasklet); return IRQ_HANDLED; |