| Message ID | 1357196388-1247-2-git-send-email-vgupta@synopsys.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On 01/03/2013 07:59 AM, Vineet Gupta wrote: > PARISC defines /proc/sys/kernel/unaligned-trap to runtime toggle > unaligned access emulation. > > The exact mechanics of enablig/disabling are still arch specific, we can > make the sysctl usable by other arches. > > Signed-off-by: Vineet Gupta<vgupta@synopsys.com> > Cc: "James E.J. Bottomley"<jejb@parisc-linux.org> > Cc: Helge Deller<deller@gmx.de> > Cc: "Eric W. Biederman"<ebiederm@xmission.com> > Cc: Serge Hallyn<serge.hallyn@canonical.com> Acked-by: Helge Deller <deller@gmx.de> Vineet, as discussed, please push it through the ARC architecture tree... Helge > --- > arch/parisc/Kconfig | 1 + > init/Kconfig | 8 ++++++++ > kernel/sysctl.c | 7 ++++++- > 3 files changed, 15 insertions(+), 1 deletions(-) > > diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig > index b77feff..8c76095 100644 > --- a/arch/parisc/Kconfig > +++ b/arch/parisc/Kconfig > @@ -20,6 +20,7 @@ config PARISC > select ARCH_HAVE_NMI_SAFE_CMPXCHG > select GENERIC_SMP_IDLE_THREAD > select GENERIC_STRNCPY_FROM_USER > + select SYSCTL_ARCH_UNALIGN_ALLOW > select HAVE_MOD_ARCH_SPECIFIC > select MODULES_USE_ELF_RELA > select CLONE_BACKWARDS > diff --git a/init/Kconfig b/init/Kconfig > index e188f9f..e64bb18 100644 > --- a/init/Kconfig > +++ b/init/Kconfig > @@ -1240,6 +1240,14 @@ config SYSCTL_ARCH_UNALIGN_NO_WARN > unaligned access emulation going on under the hood. > see arch/ia64/kernel/unaligned.c for reference > > +config SYSCTL_ARCH_UNALIGN_ALLOW > + bool > + help > + Enable support for /proc/sys/kernel/unaligned-trap > + Allows arches to define/use @unaligned_enabled to runtime toggle > + the unaligned access emulation. > + see arch/parisc/kernel/unaligned.c for reference > + > config KALLSYMS > bool "Load all symbols for debugging/ksymoops" if EXPERT > default y > diff --git a/kernel/sysctl.c b/kernel/sysctl.c > index 840fd5e..c4cd655 100644 > --- a/kernel/sysctl.c > +++ b/kernel/sysctl.c > @@ -157,13 +157,16 @@ extern int sysctl_tsb_ratio; > > #ifdef __hppa__ > extern int pwrsw_enabled; > -extern int unaligned_enabled; > #endif > > #ifdef CONFIG_IA64 > extern int unaligned_dump_stack; > #endif > > +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW > +extern int unaligned_enabled; > +#endif > + > #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN > extern int no_unaligned_warning; > #endif > @@ -548,6 +551,8 @@ static struct ctl_table kern_table[] = { > .mode = 0644, > .proc_handler = proc_dointvec, > }, > +#endif > +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW > { > .procname = "unaligned-trap", > .data =&unaligned_enabled, -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index b77feff..8c76095 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -20,6 +20,7 @@ config PARISC select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_SMP_IDLE_THREAD select GENERIC_STRNCPY_FROM_USER + select SYSCTL_ARCH_UNALIGN_ALLOW select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA select CLONE_BACKWARDS diff --git a/init/Kconfig b/init/Kconfig index e188f9f..e64bb18 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1240,6 +1240,14 @@ config SYSCTL_ARCH_UNALIGN_NO_WARN unaligned access emulation going on under the hood. see arch/ia64/kernel/unaligned.c for reference +config SYSCTL_ARCH_UNALIGN_ALLOW + bool + help + Enable support for /proc/sys/kernel/unaligned-trap + Allows arches to define/use @unaligned_enabled to runtime toggle + the unaligned access emulation. + see arch/parisc/kernel/unaligned.c for reference + config KALLSYMS bool "Load all symbols for debugging/ksymoops" if EXPERT default y diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 840fd5e..c4cd655 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -157,13 +157,16 @@ extern int sysctl_tsb_ratio; #ifdef __hppa__ extern int pwrsw_enabled; -extern int unaligned_enabled; #endif #ifdef CONFIG_IA64 extern int unaligned_dump_stack; #endif +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW +extern int unaligned_enabled; +#endif + #ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN extern int no_unaligned_warning; #endif @@ -548,6 +551,8 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, +#endif +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW { .procname = "unaligned-trap", .data = &unaligned_enabled,
PARISC defines /proc/sys/kernel/unaligned-trap to runtime toggle unaligned access emulation. The exact mechanics of enablig/disabling are still arch specific, we can make the sysctl usable by other arches. Signed-off-by: Vineet Gupta <vgupta@synopsys.com> Cc: "James E.J. Bottomley" <jejb@parisc-linux.org> Cc: Helge Deller <deller@gmx.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Serge Hallyn <serge.hallyn@canonical.com> --- arch/parisc/Kconfig | 1 + init/Kconfig | 8 ++++++++ kernel/sysctl.c | 7 ++++++- 3 files changed, 15 insertions(+), 1 deletions(-)