Revert "[PATCH] i386: add idle notifier"

This reverts commit 2ff2d3d74705d34ab71b21f54634fcf50d57bdd5.

Uwe Bugla reports that he cannot mount a floppy drive any more, and Jiri
Slaby bisected it down to this commit.

Benjamin LaHaise also points out that this is a big hot-path, and that
interrupt delivery while idle is very common and should not go through
all these expensive gyrations.

Fix up conflicts in arch/i386/kernel/apic.c and arch/i386/kernel/irq.c
due to other unrelated irq changes.

Cc: Stephane Eranian <eranian@hpl.hp.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Uwe Bugla <uwe.bugla@gmx.de>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 2 deletions

diff --git a/arch/i386/kernel/smp.c b/arch/i386/kernel/smp.c
index 9bd9637ae692..0e8977871b1f 100644
--- a/arch/i386/kernel/smp.c
+++ b/arch/i386/kernel/smp.c
@@ -23,7 +23,6 @@
 
 #include <asm/mtrr.h>
 #include <asm/tlbflush.h>
-#include <asm/idle.h>
 #include <mach_apic.h>
 
 /*
@@ -624,7 +623,6 @@ fastcall void smp_call_function_interrupt(struct pt_regs *regs)
         /*
          * At this point the info structure may be out of scope unless wait==1
          */
-        exit_idle();
         irq_enter();
         (*func)(info);
         irq_exit();