drm/amd/pm: Replace one-element array with flexible-array in struct phm_ppt_v1_mm_clo...
authorGustavo A. R. Silva <gustavoars@kernel.org>
Wed, 7 Oct 2020 16:09:34 +0000 (11:09 -0500)
committerAlex Deucher <alexander.deucher@amd.com>
Fri, 9 Oct 2020 18:43:30 +0000 (14:43 -0400)
commit03f0a7b857db5dcaf5e19ca47b3b843a183ffefc
treed73cf9f84027ba7dfcccc4995cdc8508f85430bd
parent5be63325c55a0d21f57c8aa67eb31af2b743fadc
drm/amd/pm: Replace one-element array with flexible-array in struct phm_ppt_v1_mm_clock_voltage_dependency_table

There is a regular need in the kernel to provide a way to declare having
a dynamically sized set of trailing elements in a structure. Kernel code
should always use “flexible array members”[1] for these cases. The older
style of one-element or zero-length arrays should no longer be used[2].

Refactor the code according to the use of a flexible-array member in
struct phm_ppt_v1_mm_clock_voltage_dependency_table, instead of a
one-element array, and use the struct_size() helper to calculate the
size for the allocation.

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.9-rc1/process/deprecated.html#zero-length-and-one-element-arrays

Build-tested-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/lkml/5f7d61e2.qiTVTyG2pVoG8bb0%25lkp@intel.com/
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
drivers/gpu/drm/amd/pm/powerplay/hwmgr/hwmgr_ppt.h
drivers/gpu/drm/amd/pm/powerplay/hwmgr/process_pptables_v1_0.c
drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_processpptables.c