On Wed, 2 Mar 2022, yong w wrote: > Hello, > this patch does not apply to the 4.19 kernel. > Is it necessary to make corresponding patches for each stable version? I expect there will be three variants (if it's worth porting back to older stables: you make it clear that you do want 4.19, thanks): one for xarray kernels, one for radix-tree kernels, and one for old shmem.c-not-memfd.c kernels; or perhaps I've missed a variant. Once this patch has gone to Linus, then been picked up by GregKH for recent kernels, I'll respond to the mail when it goes into his tree to provide the others (or maybe I won't bother with the oldest). We didn't research a "Fixes:" tag for the patch, so Greg may quietly stop at the oldest kernel to which the patch does not apply, instead of sending out explicit pleas for substitute patches as he usually does; but I'll know anyway when the recent ones go in, and respond then. Hugh
