Containers/Zap Patch

> +int cr_kwrite(struct cr_ctx *ctx, void *buf, int count) > +{ > + mm_segment_t oldfs; > + int ret; > + > + oldfs = get_fs(); > + set_fs(KERNEL_DS); > + ret = cr_uwrite(ctx, buf, count); > + set_fs(oldfs); > + > + return ret; > +}

get_fs()/set_fs() always feels a bit ouch, and this way you have to use __force to avoid the warnings about __user pointer casts in sparse. I wonder if you can use splice_read/splice_write to get around this problem.