bug in arch/ppc/boot/common/util.S: cmplwi cr0,r3,r4 ?

Benjamin Herrenschmidt benh at kernel.crashing.org
Thu Aug 4 19:44:08 EST 2005


On Wed, 2005-08-03 at 15:18 +0200, Frank van Maarseveen wrote:
> I think "cmplwi" expects an immediate vale as last operand
> around line 255 of arch/ppc/boot/common/util.S:
> 
> 	addi	r4,r4,_etext at l		# r8 = &_etext
> 1:	dcbf	r0,r3			# Flush the data cache
> 	icbi	r0,r3			# Invalidate the instruction cache
> 	addi	r3,r3,0x10		# Increment by one cache line
> 	cmplwi	cr0,r3,r4		# Are we at the end yet?
> 	               ^^
> 	blt	1b			# No, keep flushing and invalidating
> 
> I guess it should have been:
> 
> 	cmplw	cr0,r3,r4		# Are we at the end yet?

Yup, looks like a real bug to me, Tom ?

Ben.





More information about the Linuxppc-dev mailing list