On 27 November 2015 at 11:33, Josh Triplett <j...@joshtriplett.org> wrote: > On Fri, Nov 27, 2015 at 11:11:26AM +0200, Riku Voipio wrote: >> uselib hasn't been used since libc5; glibc does not use it. >> Deprecate uselib a bit more, by making the default y only >> if libc5 was widely used on the plaform. >> >> This makes arm64 kernel built with defconfig slighly smaller >> >> bloat-o-meter: >> add/remove: 0/3 grow/shrink: 0/2 up/down: 0/-1390 (-1390) >> function old new delta >> kernel_config_data 18164 18162 -2 >> uselib_flags 20 - -20 >> padzero 216 192 -24 >> sys_uselib 380 - -380 >> load_elf_library 964 - -964 >> >> Signed-off-by: Riku Voipio <riku.voi...@linaro.org> >> Cc: Josh Triplett <j...@joshtriplett.org> > > Seems sensible. Can you also make it only "default y" on 32-bit x86, > not 64-bit x86, since the latter never had libc5?
but running 32bit libc5 apps is possible with X86_64 kernel, so the check would become: || X86_32 || (X86_64 && IA32_EMULATION) > With that change: > Reviewed-by: Josh Triplett <j...@joshtriplett.org> > >> init/Kconfig | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/init/Kconfig b/init/Kconfig >> index c24b6f7..bef326d 100644 >> --- a/init/Kconfig >> +++ b/init/Kconfig >> @@ -285,7 +285,7 @@ config FHANDLE >> >> config USELIB >> bool "uselib syscall" >> - default y >> + def_bool ALPHA || M68K || SPARC || X86 >> help >> This option enables the uselib syscall, a system call used in the >> dynamic linker from libc5 and earlier. glibc does not use this >> -- >> 2.6.2 >> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
