2013-02-26 (화), 11:29 -0800, Kevin Hilman:
Frederic Weisbecker fweisbec@gmail.com writes:
On Wed, Feb 20, 2013 at 11:41:38AM -0800, Kevin Hilman wrote:
So that it can build on !KVM systems too.
Signed-off-by: Kevin Hilman khilman@linaro.org
kernel/context_tracking.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 74f68f4..6fe96b1 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -1,5 +1,7 @@ #include <linux/context_tracking.h> +#ifdef CONFIG_KVM #include <linux/kvm_host.h> +#endif
The header should take care of the off-case, no need to ifdef its inclusion.
In their current form, the headers will not build on platforms without KVM support. For example, these platforms (like ARM) don't even have <asm/kvm.h> or <asm/kvm_host.h>.
#include <linux/rcupdate.h> #include <linux/sched.h> #include <linux/hardirq.h> @@ -62,6 +64,7 @@ void user_exit(void) local_irq_restore(flags); } +#ifdef CONFIG_KVM void guest_enter(void) { if (vtime_accounting_enabled()) @@ -79,6 +82,7 @@ void guest_exit(void) __guest_exit(); } EXPORT_SYMBOL_GPL(guest_exit); +#endif
Kvm might be built as a module so we can't actually do this unfortunately.
Ah, right. How bout using
#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE)
for both conditionals above? Updated patch below.
This is what IS_ENABLED(CONFIG_KVM) is for.
Thanks, Namhyung
Kevin
From 4444ce39eea21a5fc63b04a711addab2a5c63243 Mon Sep 17 00:00:00 2001 From: Kevin Hilman khilman@linaro.org Date: Thu, 14 Feb 2013 10:17:37 -0800 Subject: [PATCH] context tracking: conditionalize guest support based on CONFIG_KVM
So that it can build on !KVM systems too.
Signed-off-by: Kevin Hilman khilman@linaro.org
kernel/context_tracking.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/kernel/context_tracking.c b/kernel/context_tracking.c index 74f68f4..d9c98dd 100644 --- a/kernel/context_tracking.c +++ b/kernel/context_tracking.c @@ -1,5 +1,7 @@ #include <linux/context_tracking.h> +#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE) #include <linux/kvm_host.h> +#endif #include <linux/rcupdate.h> #include <linux/sched.h> #include <linux/hardirq.h> @@ -62,6 +64,7 @@ void user_exit(void) local_irq_restore(flags); } +#if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE) void guest_enter(void) { if (vtime_accounting_enabled()) @@ -79,6 +82,7 @@ void guest_exit(void) __guest_exit(); } EXPORT_SYMBOL_GPL(guest_exit); +#endif void context_tracking_task_switch(struct task_struct *prev, struct task_struct *next)