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gpu: nvgpu: MISRA 4.5 fixes to round_up()

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MISRA Advisory Directive 4.5 states that identifiers in the same
name space with overlapping visibility should be typographically
unambiguous.

The presence of both the roundup(x,y) and round_up(x,y) macros in
the posix utils.h header incurs a violation of this rule.

These macros were added to keep in sync with the linux kernel variants.

However, there is a key distinction between how these two macros
work in the linux kernel; roundup(x,y) can handle any y alignment while
round_up(x,y) is intended to work only when y is a power-of-two.

Passing a non-power-of-two alignment to round_up(x,y) results in an
incorrect value being returned (silently).

Because all current uses of roundup(x,y) and round_up(x,y) in
nvgpu specify a y value that is a power-of-two and the underlying
posix macro implementations assume as much, it is best to remove
roundup(x,y) from nvgpu altogether to avoid any confusion.

So this change converts all uses of roundup(x,y) to round_up(x,y).

Jira NVGPU-3178

Change-Id: I0ee974d3e088fa704e251a38f6b7ada5a7600aec
Signed-off-by: Scott Long <scottl@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2271385
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: svc-mobile-misra <svc-mobile-misra@nvidia.com>
Reviewed-by: svc-mobile-cert <svc-mobile-cert@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Scott Long
2019-12-31 10:30:42 -08:00
committed by Alex Waterman
parent 3f65316312
commit ae44d384f3
11 changed files with 28 additions and 38 deletions
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10
drivers/gpu/nvgpu/os/linux/cde.c
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@@ -1,7 +1,7 @@
/*
* Color decompression engine support
*
* Copyright (c) 2014-2019, NVIDIA Corporation. All rights reserved.
* Copyright (c) 2014-2020, NVIDIA Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -1549,10 +1549,10 @@ static int gk20a_buffer_convert_gpu_to_cde_v1(
/* Compute per launch parameters */
const int xtiles = (width + 7) >> 3;
const int ytiles = (height + 7) >> 3;
const int gridw_h = roundup(xtiles, xalign) / xalign;
const int gridh_h = roundup(ytiles, yalign) / yalign;
const int gridw_v = roundup(ytiles, xalign) / xalign;
const int gridh_v = roundup(xtiles, yalign) / yalign;
const int gridw_h = round_up(xtiles, xalign) / xalign;
const int gridh_h = round_up(ytiles, yalign) / yalign;
const int gridw_v = round_up(ytiles, xalign) / xalign;
const int gridh_v = round_up(xtiles, yalign) / yalign;
const int xblocks = (xtiles + 1) >> 1;
const int voffset = compbits_voffset - compbits_hoffset;