From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Fri, 20 Oct 2006 12:33:55 +0200
From: Jan Kiszka <jan.kiszka@domain.hid>
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Subject: [Adeos-main] [PATCH] x86: revert IRQs replay order
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While digging into a latency issue with multiple IRQs pending (patch
will likely follow soon), I noticed that the replay order on x86 is the
inverse of the hardware order. Instead of iterating from lowest IRQ
number to highest, ipipe currently starts with the highest one. The
attached patch fixes this.

Jan

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Index: linux-2.6.17.13/include/asm-i386/ipipe.h
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
--- linux-2.6.17.13.orig/include/asm-i386/ipipe.h
+++ linux-2.6.17.13/include/asm-i386/ipipe.h
@@ -242,8 +242,7 @@ extern int __ipipe_tick_irq;
=20
 static inline unsigned long __ipipe_ffnz(unsigned long ul)
 {
-      __asm__("bsrl %1, %0":"=3Dr"(ul)
-      :	"r"(ul));
+	__asm__("bsfl %1, %0":"=3Dr"(ul):"r"(ul));
 	return ul;
 }
=20

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