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Commit b6fca725 authored by Vineet Gupta's avatar Vineet Gupta Committed by Tony Luck
Browse files

sysctl: Enable IA64 "ignore-unaligned-usertrap" to be used cross-arch 



IA64 defines /proc/sys/kernel/ignore-unaligned-usertrap to control
verbose warnings on unaligned access emulation.

Although the exact mechanics of what to do with sysctl (ignore/shout)
are arch specific, this change enables the sysctl to be usable cross-arch.

Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent d1c3ed66

arch/ia64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

init/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -1232,6 +1232,13 @@ 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 possibly warn

	  about unaligned access emulation going on under the hood.



config KALLSYMS

	 bool "Load all symbols for debugging/ksymoops" if EXPERT

	 default y

kernel/sysctl.c

+7 −2
Original line number Diff line number Diff line
@@ -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,