Using the ARRAY_SIZE macro improves the readability of the code.
Found with Coccinelle with the following semantic patch: @r depends on (org || report)@ type T; T[] E; position p; @@ ( (sizeof(E)@p /sizeof(*E)) | (sizeof(E)@p /sizeof(E[...])) | (sizeof(E)@p /sizeof(T)) )
Reviewed-by: Thierry Reding treding@nvidia.com Signed-off-by: Jérémy Lefaure jeremy.lefaure@lse.epita.fr --- This patch was part of a bigger patch [1] reviewed by Thierry Reding before it was split in several patches.
[1]: https://patchwork.kernel.org/patch/9979843/
drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 9 +++++---- drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 9 +++++---- 2 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index 147e92b3a959..c9f542b4e05c 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c @@ -20,6 +20,7 @@ * OTHER DEALINGS IN THE SOFTWARE. * */ +#include <linux/kernel.h> #include <linux/firmware.h> #include <drm/drmP.h> #include "amdgpu.h" @@ -3952,10 +3953,10 @@ static int gfx_v8_0_init_save_restore_list(struct amdgpu_device *adev) adev->gfx.rlc.reg_list_format_size_bytes >> 2, unique_indices, &indices_count, - sizeof(unique_indices) / sizeof(int), + ARRAY_SIZE(unique_indices), indirect_start_offsets, &offset_count, - sizeof(indirect_start_offsets)/sizeof(int)); + ARRAY_SIZE(indirect_start_offsets));
/* save and restore list */ WREG32_FIELD(RLC_SRM_CNTL, AUTO_INCR_ADDR, 1); @@ -3977,14 +3978,14 @@ static int gfx_v8_0_init_save_restore_list(struct amdgpu_device *adev) /* starting offsets starts */ WREG32(mmRLC_GPM_SCRATCH_ADDR, adev->gfx.rlc.starting_offsets_start); - for (i = 0; i < sizeof(indirect_start_offsets)/sizeof(int); i++) + for (i = 0; i < ARRAY_SIZE(indirect_start_offsets); i++) WREG32(mmRLC_GPM_SCRATCH_DATA, indirect_start_offsets[i]);
/* unique indices */ temp = mmRLC_SRM_INDEX_CNTL_ADDR_0; data = mmRLC_SRM_INDEX_CNTL_DATA_0; - for (i = 0; i < sizeof(unique_indices) / sizeof(int); i++) { + for (i = 0; i < ARRAY_SIZE(unique_indices); i++) { if (unique_indices[i] != 0) { WREG32(temp + i, unique_indices[i] & 0x3FFFF); WREG32(data + i, unique_indices[i] >> 20); diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c index 99a5b3b92e8e..7f15bb2c5233 100644 --- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c @@ -20,6 +20,7 @@ * OTHER DEALINGS IN THE SOFTWARE. * */ +#include <linux/kernel.h> #include <linux/firmware.h> #include <drm/drmP.h> #include "amdgpu.h" @@ -1730,10 +1731,10 @@ static int gfx_v9_0_init_rlc_save_restore_list(struct amdgpu_device *adev) adev->gfx.rlc.reg_list_format_size_bytes >> 2, unique_indirect_regs, &unique_indirect_reg_count, - sizeof(unique_indirect_regs)/sizeof(int), + ARRAY_SIZE(unique_indirect_regs), indirect_start_offsets, &indirect_start_offsets_count, - sizeof(indirect_start_offsets)/sizeof(int)); + ARRAY_SIZE(indirect_start_offsets));
/* enable auto inc in case it is disabled */ tmp = RREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_SRM_CNTL)); @@ -1770,12 +1771,12 @@ static int gfx_v9_0_init_rlc_save_restore_list(struct amdgpu_device *adev) /* write the starting offsets to RLC scratch ram */ WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_GPM_SCRATCH_ADDR), adev->gfx.rlc.starting_offsets_start); - for (i = 0; i < sizeof(indirect_start_offsets)/sizeof(int); i++) + for (i = 0; i < ARRAY_SIZE(indirect_start_offsets); i++) WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_GPM_SCRATCH_DATA), indirect_start_offsets[i]);
/* load unique indirect regs*/ - for (i = 0; i < sizeof(unique_indirect_regs)/sizeof(int); i++) { + for (i = 0; i < ARRAY_SIZE(unique_indirect_regs); i++) { WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_SRM_INDEX_CNTL_ADDR_0) + i, unique_indirect_regs[i] & 0x3FFFF); WREG32(SOC15_REG_OFFSET(GC, 0, mmRLC_SRM_INDEX_CNTL_DATA_0) + i,