Re: [PATCH v2] drm/radeon: replace 1-element arrays with flexible-array members

From: Alex Deucher
Date: Tue Oct 31 2023 - 16:08:18 EST

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In reply to: José Pekkarinen: "[PATCH v2] drm/radeon: replace 1-element arrays with flexible-array members"
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On Tue, Oct 31, 2023 at 1:09 PM José Pekkarinen
<jose.pekkarinen@xxxxxxxxxxx> wrote:
>
> Reported by coccinelle, the following patch will move the
> following 1 element arrays to flexible arrays.
>
> drivers/gpu/drm/radeon/atombios.h:5523:32-48: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:5545:32-48: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:5461:34-44: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:4447:30-40: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:4236:30-41: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:7095:28-45: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:3896:27-37: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:5443:16-25: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:5454:34-43: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:4603:21-32: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:4628:32-46: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:6285:29-39: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:4296:30-36: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:4756:28-36: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:4064:22-35: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:7327:9-24: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:7332:32-53: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:7362:26-41: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:7369:29-44: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:7349:24-32: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
> drivers/gpu/drm/radeon/atombios.h:7355:27-35: WARNING use flexible-array member instead (https://www.kernel.org/doc/html/latest/process/deprecated.html#zero-length-and-one-element-arrays)
>
> Signed-off-by: José Pekkarinen <jose.pekkarinen@xxxxxxxxxxx>
> ---
> [v1 -> v2] removed padding and hinted sensitive cases from original patch

Applied. Thanks!

Alex

>
> drivers/gpu/drm/radeon/atombios.h | 42 +++++++++++++++----------------
> 1 file changed, 21 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/atombios.h b/drivers/gpu/drm/radeon/atombios.h
> index 8a6621f1e82c..2db40789235c 100644
> --- a/drivers/gpu/drm/radeon/atombios.h
> +++ b/drivers/gpu/drm/radeon/atombios.h
> @@ -3893,7 +3893,7 @@ typedef struct _ATOM_GPIO_PIN_ASSIGNMENT
> typedef struct _ATOM_GPIO_PIN_LUT
> {
> ATOM_COMMON_TABLE_HEADER sHeader;
> - ATOM_GPIO_PIN_ASSIGNMENT asGPIO_Pin[1];
> + ATOM_GPIO_PIN_ASSIGNMENT asGPIO_Pin[];
> }ATOM_GPIO_PIN_LUT;
>
> /****************************************************************************/
> @@ -4061,7 +4061,7 @@ typedef struct _ATOM_SRC_DST_TABLE_FOR_ONE_OBJECT //usSrcDstTableOffset
> UCHAR ucNumberOfSrc;
> USHORT usSrcObjectID[1];
> UCHAR ucNumberOfDst;
> - USHORT usDstObjectID[1];
> + USHORT usDstObjectID[];
> }ATOM_SRC_DST_TABLE_FOR_ONE_OBJECT;
>
>
> @@ -4233,7 +4233,7 @@ typedef struct _ATOM_CONNECTOR_DEVICE_TAG_RECORD
> ATOM_COMMON_RECORD_HEADER sheader;
> UCHAR ucNumberOfDevice;
> UCHAR ucReserved;
> - ATOM_CONNECTOR_DEVICE_TAG asDeviceTag[1]; //This Id is same as "ATOM_DEVICE_XXX_SUPPORT", 1 is only for allocation
> + ATOM_CONNECTOR_DEVICE_TAG asDeviceTag[]; //This Id is same as "ATOM_DEVICE_XXX_SUPPORT", 1 is only for allocation
> }ATOM_CONNECTOR_DEVICE_TAG_RECORD;
>
>
> @@ -4293,7 +4293,7 @@ typedef struct _ATOM_OBJECT_GPIO_CNTL_RECORD
> ATOM_COMMON_RECORD_HEADER sheader;
> UCHAR ucFlags; // Future expnadibility
> UCHAR ucNumberOfPins; // Number of GPIO pins used to control the object
> - ATOM_GPIO_PIN_CONTROL_PAIR asGpio[1]; // the real gpio pin pair determined by number of pins ucNumberOfPins
> + ATOM_GPIO_PIN_CONTROL_PAIR asGpio[]; // the real gpio pin pair determined by number of pins ucNumberOfPins
> }ATOM_OBJECT_GPIO_CNTL_RECORD;
>
> //Definitions for GPIO pin state
> @@ -4444,7 +4444,7 @@ typedef struct _ATOM_BRACKET_LAYOUT_RECORD
> UCHAR ucWidth;
> UCHAR ucConnNum;
> UCHAR ucReserved;
> - ATOM_CONNECTOR_LAYOUT_INFO asConnInfo[1];
> + ATOM_CONNECTOR_LAYOUT_INFO asConnInfo[];
> }ATOM_BRACKET_LAYOUT_RECORD;
>
> /****************************************************************************/
> @@ -4600,7 +4600,7 @@ typedef struct _ATOM_I2C_VOLTAGE_OBJECT_V3
> UCHAR ucVoltageControlAddress;
> UCHAR ucVoltageControlOffset;
> ULONG ulReserved;
> - VOLTAGE_LUT_ENTRY asVolI2cLut[1]; // end with 0xff
> + VOLTAGE_LUT_ENTRY asVolI2cLut[]; // end with 0xff
> }ATOM_I2C_VOLTAGE_OBJECT_V3;
>
> // ATOM_I2C_VOLTAGE_OBJECT_V3.ucVoltageControlFlag
> @@ -4625,7 +4625,7 @@ typedef struct _ATOM_LEAKAGE_VOLTAGE_OBJECT_V3
> UCHAR ucLeakageEntryNum; // indicate the entry number of LeakageId/Voltage Lut table
> UCHAR ucReserved[2];
> ULONG ulMaxVoltageLevel;
> - LEAKAGE_VOLTAGE_LUT_ENTRY_V2 asLeakageIdLut[1];
> + LEAKAGE_VOLTAGE_LUT_ENTRY_V2 asLeakageIdLut[];
> }ATOM_LEAKAGE_VOLTAGE_OBJECT_V3;
>
>
> @@ -4753,7 +4753,7 @@ typedef struct _ATOM_POWER_SOURCE_INFO
> {
> ATOM_COMMON_TABLE_HEADER asHeader;
> UCHAR asPwrbehave[16];
> - ATOM_POWER_SOURCE_OBJECT asPwrObj[1];
> + ATOM_POWER_SOURCE_OBJECT asPwrObj[];
> }ATOM_POWER_SOURCE_INFO;
>
>
> @@ -5440,7 +5440,7 @@ typedef struct _ATOM_FUSION_SYSTEM_INFO_V2
> typedef struct _ATOM_I2C_DATA_RECORD
> {
> UCHAR ucNunberOfBytes; //Indicates how many bytes SW needs to write to the external ASIC for one block, besides to "Start" and "Stop"
> - UCHAR ucI2CData[1]; //I2C data in bytes, should be less than 16 bytes usually
> + UCHAR ucI2CData[]; //I2C data in bytes, should be less than 16 bytes usually
> }ATOM_I2C_DATA_RECORD;
>
>
> @@ -5451,14 +5451,14 @@ typedef struct _ATOM_I2C_DEVICE_SETUP_INFO
> UCHAR ucSSChipID; //SS chip being used
> UCHAR ucSSChipSlaveAddr; //Slave Address to set up this SS chip
> UCHAR ucNumOfI2CDataRecords; //number of data block
> - ATOM_I2C_DATA_RECORD asI2CData[1];
> + ATOM_I2C_DATA_RECORD asI2CData[];
> }ATOM_I2C_DEVICE_SETUP_INFO;
>
> //==========================================================================================
> typedef struct _ATOM_ASIC_MVDD_INFO
> {
> ATOM_COMMON_TABLE_HEADER sHeader;
> - ATOM_I2C_DEVICE_SETUP_INFO asI2CSetup[1];
> + ATOM_I2C_DEVICE_SETUP_INFO asI2CSetup[];
> }ATOM_ASIC_MVDD_INFO;
>
> //==========================================================================================
> @@ -5520,7 +5520,7 @@ typedef struct _ATOM_ASIC_INTERNAL_SS_INFO
> typedef struct _ATOM_ASIC_INTERNAL_SS_INFO_V2
> {
> ATOM_COMMON_TABLE_HEADER sHeader;
> - ATOM_ASIC_SS_ASSIGNMENT_V2 asSpreadSpectrum[1]; //this is point only.
> + ATOM_ASIC_SS_ASSIGNMENT_V2 asSpreadSpectrum[]; //this is point only.
> }ATOM_ASIC_INTERNAL_SS_INFO_V2;
>
> typedef struct _ATOM_ASIC_SS_ASSIGNMENT_V3
> @@ -5542,7 +5542,7 @@ typedef struct _ATOM_ASIC_SS_ASSIGNMENT_V3
> typedef struct _ATOM_ASIC_INTERNAL_SS_INFO_V3
> {
> ATOM_COMMON_TABLE_HEADER sHeader;
> - ATOM_ASIC_SS_ASSIGNMENT_V3 asSpreadSpectrum[1]; //this is pointer only.
> + ATOM_ASIC_SS_ASSIGNMENT_V3 asSpreadSpectrum[]; //this is pointer only.
> }ATOM_ASIC_INTERNAL_SS_INFO_V3;
>
>
> @@ -6282,7 +6282,7 @@ typedef union _ATOM_MEMORY_SETTING_ID_CONFIG_ACCESS
>
> typedef struct _ATOM_MEMORY_SETTING_DATA_BLOCK{
> ATOM_MEMORY_SETTING_ID_CONFIG_ACCESS ulMemoryID;
> - ULONG aulMemData[1];
> + ULONG aulMemData[];
> }ATOM_MEMORY_SETTING_DATA_BLOCK;
>
>
> @@ -7092,7 +7092,7 @@ typedef struct _ATOM_DISP_OUT_INFO_V3
> UCHAR ucCoreRefClkSource; // value of CORE_REF_CLK_SOURCE
> UCHAR ucDispCaps;
> UCHAR ucReserved[2];
> - ASIC_TRANSMITTER_INFO_V2 asTransmitterInfo[1]; // for alligment only
> + ASIC_TRANSMITTER_INFO_V2 asTransmitterInfo[]; // for alligment only
> }ATOM_DISP_OUT_INFO_V3;
>
> //ucDispCaps
> @@ -7324,12 +7324,12 @@ typedef struct _CLOCK_CONDITION_SETTING_ENTRY{
> USHORT usMaxClockFreq;
> UCHAR ucEncodeMode;
> UCHAR ucPhySel;
> - ULONG ulAnalogSetting[1];
> + ULONG ulAnalogSetting[];
> }CLOCK_CONDITION_SETTING_ENTRY;
>
> typedef struct _CLOCK_CONDITION_SETTING_INFO{
> USHORT usEntrySize;
> - CLOCK_CONDITION_SETTING_ENTRY asClkCondSettingEntry[1];
> + CLOCK_CONDITION_SETTING_ENTRY asClkCondSettingEntry[];
> }CLOCK_CONDITION_SETTING_INFO;
>
> typedef struct _PHY_CONDITION_REG_VAL{
> @@ -7346,27 +7346,27 @@ typedef struct _PHY_CONDITION_REG_VAL_V2{
> typedef struct _PHY_CONDITION_REG_INFO{
> USHORT usRegIndex;
> USHORT usSize;
> - PHY_CONDITION_REG_VAL asRegVal[1];
> + PHY_CONDITION_REG_VAL asRegVal[];
> }PHY_CONDITION_REG_INFO;
>
> typedef struct _PHY_CONDITION_REG_INFO_V2{
> USHORT usRegIndex;
> USHORT usSize;
> - PHY_CONDITION_REG_VAL_V2 asRegVal[1];
> + PHY_CONDITION_REG_VAL_V2 asRegVal[];
> }PHY_CONDITION_REG_INFO_V2;
>
> typedef struct _PHY_ANALOG_SETTING_INFO{
> UCHAR ucEncodeMode;
> UCHAR ucPhySel;
> USHORT usSize;
> - PHY_CONDITION_REG_INFO asAnalogSetting[1];
> + PHY_CONDITION_REG_INFO asAnalogSetting[];
> }PHY_ANALOG_SETTING_INFO;
>
> typedef struct _PHY_ANALOG_SETTING_INFO_V2{
> UCHAR ucEncodeMode;
> UCHAR ucPhySel;
> USHORT usSize;
> - PHY_CONDITION_REG_INFO_V2 asAnalogSetting[1];
> + PHY_CONDITION_REG_INFO_V2 asAnalogSetting[];
> }PHY_ANALOG_SETTING_INFO_V2;
>
> typedef struct _GFX_HAVESTING_PARAMETERS {
> --
> 2.39.2
>

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Previous message: Charlie Jenkins: "Re: [PATCH v7 1/3] riscv: Avoid unaligned access when relocating modules"
In reply to: José Pekkarinen: "[PATCH v2] drm/radeon: replace 1-element arrays with flexible-array members"
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