[custom] I am reading the code about gpu::octree, But I am confusing that the scan_warp funciton in gpu/octree/src/utils/scan_block.hpp

[cwczyj]

I am reading the code about gpu::octree, But I am confusing that the scan_warp funciton in gpu/octree/src/utils/scan_block.hpp, Is there need any __syncwarp() function to ensure that the program wouldn't write the ptr[idx] after read ptr[idx] in the branch if ( lane >= 4) or others?