sg_is_chain() call in coh901318_lli_fill_sg()

Bart Van Assche bvanassche at
Mon Feb 4 06:33:13 EST 2013


I'm trying to understand how coh901318_lli_fill_sg() works by studying 
the source code of that function. In that function I found the following 

	for_each_sg(sgl, sg, nents, i) {
		if (sg_is_chain(sg)) {
			[ ... ]

Can anyone explain me why that construct makes sense ? As far as I can 
see in lib/scatterlist.c sg_next() ensures that the for_each_sg() skips 
those elements for which sg_is_chain(sg) == true. Does that mean that 
sg_is_chain(sg) always evaluates to false in the above loop ?



More information about the linux-arm-kernel mailing list