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authorCyrill Gorcunov <gorcunov@openvz.org>2009-04-12 20:47:41 +0400
committerIngo Molnar <mingo@elte.hu>2009-04-12 19:23:53 +0200
commit08306ce61d6848e6fbf74fa4cc693c3fb29e943f (patch)
treef61e7f9061e5fa11447b5ab7fd473bfe8985bb99 /arch/x86/include/asm/apic.h
parentc0eaa4536f08b98fbcfa7fce5b7b0de1bebcb0e1 (diff)
x86: apic - introduce dummy apic operations
Impact: refactor, speed up and robustize code In case if apic was disabled by kernel option or by hardware limits we can use dummy operations in apic->write to simplify the ack_APIC_irq() code. At the lame time the patch fixes the missed EOI in do_IRQ function (which has place if kernel is compiled as X86-32 and interrupt without handler happens where apic was not asked to be disabled via kernel option). Note that native_apic_write_dummy() consists of WARN_ON_ONCE to catch any buggy writes on enabled APICs. Could be removed after some time of testing. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> LKML-Reference: <20090412165058.724788431@openvz.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/include/asm/apic.h')
-rw-r--r--arch/x86/include/asm/apic.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 42f2f837742..2bd5a463fd1 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -212,6 +212,7 @@ static inline void ack_x2APIC_irq(void)
}
#endif
+extern void apic_disable(void);
extern int lapic_get_maxlvt(void);
extern void clear_local_APIC(void);
extern void connect_bsp_APIC(void);
@@ -252,7 +253,7 @@ static inline void lapic_shutdown(void) { }
#define local_apic_timer_c2_ok 1
static inline void init_apic_mappings(void) { }
static inline void disable_local_APIC(void) { }
-
+static inline void apic_disable(void) { }
#endif /* !CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_64