[PATCH][2.5.68] 16-byte align x86 IRQ entry points

[Chuck Ebbert]

 How can I further test this patch?  (It boots...)

 It should be harmless; at worst it will add about 1K to an
SMP or IOAPIC kernel.

 If it works it should reduce interrupt latency.

--- a/arch/i386/kernel/entry.S
+++ b/arch/i386/kernel/entry.S
@ -382,29 +382,31 @
 ENTRY(interrupt)
 .text
 
-vector=0
+	.align 16,0x90
 ENTRY(irq_entries_start)
+vector=0
 .rept NR_IRQS
-	ALIGN
 1:	pushl $vector-256
 	jmp common_interrupt
+	.align 16,0x90
 .data
 	.long 1b
 .text
 vector=vector+1
 .endr
 
-	ALIGN
+/* aligned 16 */
 common_interrupt:
 	SAVE_ALL
 	call do_IRQ
 	jmp ret_from_intr
 
 #define BUILD_INTERRUPT(name, nr)	\
+	.align 16,0x90;			\
 ENTRY(name)				\
 	pushl $nr-256;			\
 	SAVE_ALL			\
-	call smp_/**/name;	\
+	call smp_/**/name;		\
 	jmp ret_from_intr;
 
 /* The include is where all of the SMP etc. interrupts come from */

------
 Chuck