[PATCH] M68k: optimize stacked irq check

M68k: optimize stacked irq check (from Roman Zippel)

[PATCH] M68k: optimize stacked irq check
M68k: optimize stacked irq check (from Roman Zippel)
6f1c8bb5 · Geert Uytterhoeven · Linus Torvalds · 5a178f93 · 6f1c8bb5
Commit 6f1c8bb5 authored Nov 02, 2002 by Geert Uytterhoeven Committed by Linus Torvalds Nov 02, 2002
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arch/m68k/kernel/entry.S arch/m68k/kernel/entry.S +4 -7

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--- a/arch/m68k/kernel/entry.S
+++ b/arch/m68k/kernel/entry.S
@@ -246,13 +246,10 @@ ret_from_interrupt:
 2:
 	RESTORE_ALL
 1:
-#if 1
+	moveq	#(~ALLOWINT>>8)&0xff,%d0
-	bfextu  %sp@(PT_SR){#5,#3},%d0	| Check for nested interrupt.
+	andb	%sp@(PT_SR),%d0
-#if MAX_NOINT_IPL > 0
+	jne	2b
-	cmpiw	#MAX_NOINT_IPL,%d0
-#endif
-	jhi	2b
-#endif
 	/* check if we need to do software interrupts */
 	tstl	irq_stat+CPUSTAT_SOFTIRQ_PENDING
 	jeq	ret_from_exception