GPIO and ADC variables (Which is created by me) are assigned memory addresses are overlapping and making GPIO data to toggle

Hi, 

I am using keil rtx5 for lpc4357 controller. Where I am trying to read data from adc and gpio pins. I created two threads. one is reading adc data and storing in a 64 bit structure. And other is reading gpio pins state. In adc I am using SPI0 to read and reading at a time 16 Byte data. While doing this my gpio reading data got affected. I saw the both gpio and ADC variables (Which is created by me) are assigned memory addresses are overlapping. How to solve this issue can anyone please help?

__NO_RETURN static void scanInputThread (void *arg)
	{

	osStatus_t result;

	while(1){
		readInputs(CHANNEL0);
		}	
}
	
	__NO_RETURN static void adcReadThread (void *arg)
	{

	osStatus_t result;

	while(1){
		adcReadSpi();
		
	}	
}

void adcReadSpi(void)
{
	uint16_t i=0;
	CONV_STARTA;
	CONV_STARTB;
	CONV_ENDA;
	CONV_ENDB;	
	delay_us(10);
	
  	ptrSPI0->Control(ARM_SPI_CONTROL_SS, ARM_SPI_SS_ACTIVE);
		ptrSPI0->Receive   (&(adcInput/*.adcData[i]*/),sizeof(adcInput/*.adcData[i]*/));
		while (ptrSPI0->GetStatus().busy) ;
		ptrSPI0->Control(ARM_SPI_CONTROL_SS, ARM_SPI_SS_INACTIVE);

}

void readInputs(uint8_t channel)
{

	switch(channel)
	{

		case CHANNEL0:
			INPUT_SEL_LATCH0;
			ahsDigitalInput.all[0] = (((uint8_t)GPIO_PortRead(MC_DATA_IN_PORT)));
		break;

		case CHANNEL1:
			INPUT_SEL_LATCH1;
			ahsDigitalInput.all[1] = (((uint8_t)GPIO_PortRead(MC_DATA_IN_PORT)));		
		break;
    }