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Groups > linux.kernel > #1278662 > unrolled thread
| Started by | Riku Voipio <riku.voipio@linaro.org> |
|---|---|
| First post | 2015-11-27 10:20 +0100 |
| Last post | 2015-11-27 21:10 +0100 |
| Articles | 4 — 2 participants |
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[PATCH] uselib: default depending if libc5 was used Riku Voipio <riku.voipio@linaro.org> - 2015-11-27 10:20 +0100
Re: [PATCH] uselib: default depending if libc5 was used Josh Triplett <josh@joshtriplett.org> - 2015-11-27 10:40 +0100
Re: [PATCH] uselib: default depending if libc5 was used Riku Voipio <riku.voipio@linaro.org> - 2015-11-27 11:50 +0100
Re: [PATCH] uselib: default depending if libc5 was used Josh Triplett <josh@joshtriplett.org> - 2015-11-27 21:10 +0100
| From | Riku Voipio <riku.voipio@linaro.org> |
|---|---|
| Date | 2015-11-27 10:20 +0100 |
| Subject | [PATCH] uselib: default depending if libc5 was used |
| Message-ID | <qznma-UI-7@gated-at.bofh.it> |
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.voipio@linaro.org> Cc: Josh Triplett <josh@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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Josh Triplett <josh@joshtriplett.org> |
|---|---|
| Date | 2015-11-27 10:40 +0100 |
| Message-ID | <qznFw-11n-13@gated-at.bofh.it> |
| In reply to | #1278662 |
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.voipio@linaro.org> > Cc: Josh Triplett <josh@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? With that change: Reviewed-by: Josh Triplett <josh@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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Riku Voipio <riku.voipio@linaro.org> |
|---|---|
| Date | 2015-11-27 11:50 +0100 |
| Message-ID | <qzoLg-1HO-15@gated-at.bofh.it> |
| In reply to | #1278672 |
On 27 November 2015 at 11:33, Josh Triplett <josh@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.voipio@linaro.org> >> Cc: Josh Triplett <josh@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 <josh@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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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| From | Josh Triplett <josh@joshtriplett.org> |
|---|---|
| Date | 2015-11-27 21:10 +0100 |
| Message-ID | <qzxvc-7sb-5@gated-at.bofh.it> |
| In reply to | #1278713 |
On Fri, Nov 27, 2015 at 12:48:29PM +0200, Riku Voipio wrote: > On 27 November 2015 at 11:33, Josh Triplett <josh@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.voipio@linaro.org> > >> Cc: Josh Triplett <josh@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) Fair point. Seems unlikely that anyone would do so, but certainly possible. > > With that change: > > Reviewed-by: Josh Triplett <josh@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 majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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