Messages in this thread | | | Date | Thu, 25 Feb 2021 12:16:58 -0800 | From | Kees Cook <> | Subject | Re: [PATCH] [RFT] m68k: enable HAVE_LD_DEAD_CODE_DATA_ELIMINATION |
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On Thu, Feb 25, 2021 at 12:14:45PM +0100, Arnd Bergmann wrote: > From: Arnd Bergmann <arnd@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+ELHt9A@mail.gmail.com/ > Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
-- Kees Cook
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