| From | Vineet Gupta <> | Subject | [PATCH v2 55/76] sysctl: Enable PARISC "unaligned-trap" to be used cross-arch | Date | Fri, 18 Jan 2013 17:55:09 +0530 |
| |
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> Acked-by: Helge Deller <deller@gmx.de> 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(-)
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 a733964..325df23 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, -- 1.7.4.1
|