Messages in this thread | | | Subject | Re: IB/hfi1: Adjust another size determination in hfi1_user_sdma_alloc_queues() | From | SF Markus Elfring <> | Date | Mon, 13 Feb 2017 11:37:19 +0100 |
| |
>> How often does it really make sense to keep such a product in this local variable? > > It depends. Lets take it the other way round. If I this in a review I'd > suggest the submitter to create a local variable for the multiplication > to get rid of the line break. It's avoidable.
I imagine that there are further possibilities to improve the involved programming for various arrays.
> And again, the compiler will optimize it away. > > Apart from the fact that you haven't tested your patch at all:
This is true in principle as I could compile the source code adjustment at least.
> jthumshirn@linux-x5ow:linux (test)$ git am ~/\[PATCH\ 3_5\]\ IB_hfi1\:\ > Adjust\ another\ size\ determination\ in\ > hfi1_user_sdma_alloc_queues\(\).eml > Applying: IB/hfi1: Adjust another size determination in > hfi1_user_sdma_alloc_queues() > jthumshirn@linux-x5ow:linux (test)$ make > drivers/infiniband/hw/hfi1/user_sdma.o CHK > include/config/kernel.release > CHK include/generated/uapi/linux/version.h > CHK include/generated/utsrelease.h > CHK include/generated/bounds.h > CHK include/generated/timeconst.h > CHK include/generated/asm-offsets.h > CALL scripts/checksyscalls.sh > CC drivers/infiniband/hw/hfi1/user_sdma.o > drivers/infiniband/hw/hfi1/user_sdma.c: In function > ‘hfi1_user_sdma_alloc_queues’: > drivers/infiniband/hw/hfi1/user_sdma.c:402:2: error: ‘memsize’ > undeclared (first use in this function) > memsize = sizeof(*pq->reqs) * hfi1_sdma_comp_ring_size; > ^
How do you think about to apply also the previous update step like “[PATCH 2/5] IB/hfi1: Use kcalloc() in hfi1_user_sdma_alloc_queues()”?
> So to sum up: there is no evident improvement in the resulting binary
There might not be a remarkable difference with the default software build parameters.
> and you introduce a stylistic glitch (the new line break in a function call).
There are different opinions about this implementation detail, aren't there?
Regards, Markus
| |