aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorCyrill Gorcunov <gorcunov@openvz.org>2009-10-14 00:07:04 +0400
committerIngo Molnar <mingo@elte.hu>2009-10-14 09:17:00 +0200
commita933c61829509eb27083146dda392132baa0969a (patch)
tree0300be471bbde65c40c54108423a27103b583cc2 /arch
parent9844ab11c763bfed9f054c82366b19dcda66aca9 (diff)
x86, apic: Use apic noop driver
In case if apic were disabled we may use the whole apic NOOP driver instead of sparse poking the some functions in apic driver. Also NOOP would catch any inappropriate apic operation calls (not just read/write). Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Cc: yinghai@kernel.org Cc: macro@linux-mips.org LKML-Reference: <20091013201022.747817361@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/apic/apic.c22
1 files changed, 3 insertions, 19 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 894aa97f071..61a5628810d 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -241,28 +241,12 @@ static int modern_apic(void)
}
/*
- * bare function to substitute write operation
- * and it's _that_ fast :)
- */
-static void native_apic_write_dummy(u32 reg, u32 v)
-{
- WARN_ON_ONCE((cpu_has_apic || !disable_apic));
-}
-
-static u32 native_apic_read_dummy(u32 reg)
-{
- WARN_ON_ONCE((cpu_has_apic && !disable_apic));
- return 0;
-}
-
-/*
- * right after this call apic->write/read doesn't do anything
- * note that there is no restore operation it works one way
+ * right after this call apic become NOOP driven
+ * so apic->write/read doesn't do anything
*/
void apic_disable(void)
{
- apic->read = native_apic_read_dummy;
- apic->write = native_apic_write_dummy;
+ apic = &apic_noop;
}
void native_apic_wait_icr_idle(void)