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Message-ID: <1357195653-998-2-git-send-email-vgupta@synopsys.com> Date: Thu, 3 Jan 2013 12:17:33 +0530 From: Vineet Gupta <Vineet.Gupta1@...opsys.com> To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com> CC: <linux-kernel@...r.kernel.org>, <linux-ia64@...r.kernel.org>, <linux-arch@...r.kernel.org>, <arnd@...db.de>, Vineet Gupta <Vineet.Gupta1@...opsys.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, "Serge Hallyn" <serge.hallyn@...onical.com> Subject: [RESEND PATCH] sysctl: Enable IA64 "ignore-unaligned-usertrap" to be used cross-arch IA64 defines /proc/sys/kernel/ignore-unaligned-usertrap to control verbosw warnings on unaligned access emaultion. While the exact menchaincs (ignore/shout) are still arch specific, we can make the sysctl usable by other arches. Signed-off-by: Vineet Gupta <vgupta@...opsys.com> Cc: Tony Luck <tony.luck@...el.com> Cc: Fenghua Yu <fenghua.yu@...el.com> Cc: "Eric W. Biederman" <ebiederm@...ssion.com> Cc: Serge Hallyn <serge.hallyn@...onical.com> --- arch/ia64/Kconfig | 1 + init/Kconfig | 8 ++++++++ kernel/sysctl.c | 9 +++++++-- 3 files changed, 16 insertions(+), 2 deletions(-) diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig index 3279646..5fb1064 100644 --- a/arch/ia64/Kconfig +++ b/arch/ia64/Kconfig @@ -40,6 +40,7 @@ config IA64 select ARCH_THREAD_INFO_ALLOCATOR select ARCH_CLOCKSOURCE_DATA select GENERIC_TIME_VSYSCALL_OLD + select SYSCTL_ARCH_UNALIGN_NO_WARN select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA default y diff --git a/init/Kconfig b/init/Kconfig index 7d30240..e188f9f 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1232,6 +1232,14 @@ config SYSCTL_EXCEPTION_TRACE help Enable support for /proc/sys/debug/exception-trace. +config SYSCTL_ARCH_UNALIGN_NO_WARN + bool + help + Enable support for /proc/sys/kernel/ignore-unaligned-usertrap + Allows arch to define/use @no_unaligned_warning to possbly warn about + unaligned access emulation going on under the hood. + see arch/ia64/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 c88878d..840fd5e 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -161,10 +161,13 @@ extern int unaligned_enabled; #endif #ifdef CONFIG_IA64 -extern int no_unaligned_warning; extern int unaligned_dump_stack; #endif +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN +extern int no_unaligned_warning; +#endif + #ifdef CONFIG_PROC_SYSCTL static int proc_do_cad_pid(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); @@ -911,7 +914,7 @@ static struct ctl_table kern_table[] = { .proc_handler = proc_doulongvec_minmax, }, #endif -#ifdef CONFIG_IA64 +#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN { .procname = "ignore-unaligned-usertrap", .data = &no_unaligned_warning, @@ -919,6 +922,8 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = proc_dointvec, }, +#endif +#ifdef CONFIG_IA64 { .procname = "unaligned-dump-stack", .data = &unaligned_dump_stack, -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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