On Thu, Feb 25, 2021 at 12:14:45PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann <a...@arndb.de> > > While experimenting with CONFIG_TRIM_UNUSED_KSYMS across architectures, > I noticed that this unsurprisingly works best when combined with the > --gc-sections linker flag, which is not currently allowed on m68k. > > Enabling it with this patch shows significant improvements > for kernel size, looking at m68k defconfig with gcc-10, I get > > 4005135 1374302 167108 5546545 54a231 vmlinux-normal > 3916254 1378078 167108 5461440 5355c0 vmlinux+trim > 4012933 1362514 164280 5539727 54878f vmlinux+gcsection > 3797884 1334194 164640 5296718 50d24e vmlinux+gcsection+trim > > There are probably bugs somewhere, but if someone is able to test this > patch and fix any issues that come up, would be a useful improvement > for memory-limited machines. > > Link: > https://lore.kernel.org/lkml/cak8p3a05vz9hskrzvtxtn+1nf9e+gqebjwtj6n23nfm+elh...@mail.gmail.com/ > Signed-off-by: Arnd Bergmann <a...@arndb.de>
Reviewed-by: Kees Cook <keesc...@chromium.org> -- Kees Cook
