Using the ARRAY_SIZE macro improves the readability of the code. Also, it is not always useful to use a variable to store this constant calculated at compile time nor to re-invent the ARRAY_SIZE macro.
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)) )
Signed-off-by: Jérémy Lefaure jeremy.lefaure@lse.epita.fr --- drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c | 9 +++++---- drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 9 +++++---- drivers/gpu/drm/gma500/psb_intel_sdvo.c | 9 ++++----- drivers/gpu/drm/i915/gvt/vgpu.c | 3 ++- drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c | 7 ++++--- drivers/gpu/drm/via/via_verifier.c | 10 ++++------ 6 files changed, 24 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c index dfc10b1baea0..304862e2a8a6 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 deeaee1457ef..180726f4f34e 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, diff --git a/drivers/gpu/drm/gma500/psb_intel_sdvo.c b/drivers/gpu/drm/gma500/psb_intel_sdvo.c index e787d376ba67..84507912be84 100644 --- a/drivers/gpu/drm/gma500/psb_intel_sdvo.c +++ b/drivers/gpu/drm/gma500/psb_intel_sdvo.c @@ -37,6 +37,7 @@ #include "psb_drv.h" #include "psb_intel_sdvo_regs.h" #include "psb_intel_reg.h" +#include <linux/kernel.h>
#define SDVO_TMDS_MASK (SDVO_OUTPUT_TMDS0 | SDVO_OUTPUT_TMDS1) #define SDVO_RGB_MASK (SDVO_OUTPUT_RGB0 | SDVO_OUTPUT_RGB1) @@ -62,8 +63,6 @@ static const char *tv_format_names[] = { "SECAM_60" };
-#define TV_FORMAT_NUM (sizeof(tv_format_names) / sizeof(*tv_format_names)) - struct psb_intel_sdvo { struct gma_encoder base;
@@ -148,7 +147,7 @@ struct psb_intel_sdvo_connector { int force_audio;
/* This contains all current supported TV format */ - u8 tv_format_supported[TV_FORMAT_NUM]; + u8 tv_format_supported[ARRAY_SIZE(tv_format_names)]; int format_supported_num; struct drm_property *tv_format;
@@ -1709,7 +1708,7 @@ psb_intel_sdvo_set_property(struct drm_connector *connector, }
if (property == psb_intel_sdvo_connector->tv_format) { - if (val >= TV_FORMAT_NUM) + if (val >= ARRAY_SIZE(tv_format_names)) return -EINVAL;
if (psb_intel_sdvo->tv_format_index == @@ -2269,7 +2268,7 @@ static bool psb_intel_sdvo_tv_create_property(struct psb_intel_sdvo *psb_intel_s return false;
psb_intel_sdvo_connector->format_supported_num = 0; - for (i = 0 ; i < TV_FORMAT_NUM; i++) + for (i = 0 ; i < ARRAY_SIZE(tv_format_names); i++) if (format_map & (1 << i)) psb_intel_sdvo_connector->tv_format_supported[psb_intel_sdvo_connector->format_supported_num++] = i;
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c index 02c61a1ad56a..9c6d2849c5b7 100644 --- a/drivers/gpu/drm/i915/gvt/vgpu.c +++ b/drivers/gpu/drm/i915/gvt/vgpu.c @@ -31,6 +31,7 @@ * */
+#include <linux/kernel.h> #include "i915_drv.h" #include "gvt.h" #include "i915_pvinfo.h" @@ -116,7 +117,7 @@ int intel_gvt_init_vgpu_types(struct intel_gvt *gvt) */ low_avail = gvt_aperture_sz(gvt) - HOST_LOW_GM_SIZE; high_avail = gvt_hidden_sz(gvt) - HOST_HIGH_GM_SIZE; - num_types = sizeof(vgpu_types) / sizeof(vgpu_types[0]); + num_types = ARRAY_SIZE(vgpu_types);
gvt->types = kzalloc(num_types * sizeof(struct intel_vgpu_type), GFP_KERNEL); diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c index b58ee99f7bfc..9cc10e438b3d 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/init.c @@ -36,6 +36,8 @@ #include <subdev/i2c.h> #include <subdev/vga.h>
+#include <linux/kernel.h> + #define bioslog(lvl, fmt, args...) do { \ nvkm_printk(init->subdev, lvl, info, "0x%08x[%c]: "fmt, \ init->offset, init_exec(init) ? \ @@ -2271,8 +2273,6 @@ static struct nvbios_init_opcode { [0xaa] = { init_reserved }, };
-#define init_opcode_nr (sizeof(init_opcode) / sizeof(init_opcode[0])) - int nvbios_exec(struct nvbios_init *init) { @@ -2281,7 +2281,8 @@ nvbios_exec(struct nvbios_init *init) init->nested++; while (init->offset) { u8 opcode = nvbios_rd08(bios, init->offset); - if (opcode >= init_opcode_nr || !init_opcode[opcode].exec) { + if (opcode >= ARRAY_SIZE(init_opcode) || + !init_opcode[opcode].exec) { error("unknown opcode 0x%02x\n", opcode); return -EINVAL; } diff --git a/drivers/gpu/drm/via/via_verifier.c b/drivers/gpu/drm/via/via_verifier.c index 0677bbf4ec7e..fb2609434df7 100644 --- a/drivers/gpu/drm/via/via_verifier.c +++ b/drivers/gpu/drm/via/via_verifier.c @@ -34,6 +34,7 @@ #include <drm/drm_legacy.h> #include "via_verifier.h" #include "via_drv.h" +#include <linux/kernel.h>
typedef enum { state_command, @@ -1102,10 +1103,7 @@ setup_hazard_table(hz_init_t init_table[], hazard_t table[], int size)
void via_init_command_verifier(void) { - setup_hazard_table(init_table1, table1, - sizeof(init_table1) / sizeof(hz_init_t)); - setup_hazard_table(init_table2, table2, - sizeof(init_table2) / sizeof(hz_init_t)); - setup_hazard_table(init_table3, table3, - sizeof(init_table3) / sizeof(hz_init_t)); + setup_hazard_table(init_table1, table1, ARRAY_SIZE(init_table1)); + setup_hazard_table(init_table2, table2, ARRAY_SIZE(init_table2)); + setup_hazard_table(init_table3, table3, ARRAY_SIZE(init_table3)); }