Data sharing among various kernels

Should the global buffer be defined as the argument in one of the kernel? Because when I define __global float share[10] in Pipe_in kernel (below program), i end up with errors.

# pragma OPENCL EXTENSION cl_intel_channels : enable

channel float data_ch __attribute__((depth(0)));

__kernel void Pipe_in(__global float *restrict x, __global float *restrict check) {

// Get index of the work item

__global float share[10];

uint count;

for (count = 0; count<10; count++){

write_channel_intel(data_ch, x[count]);

share[count] = x[count];

}

}

__kernel void Pipe_out(__global float *restrict y) {

// Get index of the work item

uint count;

for (count = 0; count<10; count++)

y[count] = share[count];

}