On Tue, Mar 3, 2020 at 3:30 PM Pascal via arch-general <arch-general@xxxxxxxxxxxxx> wrote: > > yes, I've just recompiled and this second time was much faster ! > > to be more precise, here is the very small modification made to the file > mentioned above : > > --- src/linux-5.4.23/block/blk-core.c 2020-02-28 17:22:29.000000000 +0100 > +++ /tmp/blk-core.c 2020-03-03 14:25:56.049803851 +0100 > @@ -799,7 +799,7 @@ > "to read-only block-device %s (partno %d)\n", > bio_devname(bio, b), part->partno); > /* Older lvm-tools actually trigger this */ > - return false; > + return true; > } > > return false; > > Le mar. 3 mars 2020 à 14:19, Caleb Maclennan <caleb@xxxxxxxxxxx> a écrit : > > > On Tue, Mar 3, 2020 at 4:06 PM Pascal via arch-general < > > arch-general@xxxxxxxxxxxxx> wrote: > > > >> it's necessary to recompile completely even if the kernel I'm using is the > >> same as the one I want to apply a small modification on ? > >> > > > > Yes. > > > > The only small consolation is that once you compile it once and have a > > source tree that has been fully built on your system, further small changes > > and re-compiles will go much faster because it will figure out _some_ of > > the things it doesn't need to do again. I the case of the kernel, it still > > won't be fast. > > > > Caleb > > You could just do: make M=block ;to rebuild the part of the kernel modified make ;to rebuild all other object files affected and to relink the kernel image from the root of your kernel source tree, followed by: make modules_install make install etc See http://files.kroah.com/lkn/lkn_pdf/ch04.pdf, Building Only a Portion of the Kernel.
