Commit 59fd6b8c authored Oct 17, 2008 by Mike Ditto Committed by Benjamin Herrenschmidt Oct 21, 2008

powerpc: Fix boot wrapper memcmp() called with zero length argument



I noticed, when trying to use, e.g.,
node = find_node_by_prop_value(prev, "booleanprop", "", 0))
to search for all nodes with a certain boolean property, that memcmp()
returns garbage when comparing zero bytes.  It should return zero.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent e8170372

arch/powerpc/boot/string.S

+3 −1

Original line number	Diff line number	Diff line
		@@ -235,7 +235,7 @@ memchr:
		.globl memcmp
		memcmp:
		cmpwi 0,r5,0
		blelr
		ble 2f
		mtctr r5
		addi r6,r3,-1
		addi r4,r4,-1
		@@ -244,6 +244,8 @@ memcmp:
		subf. r3,r0,r3
		bdnzt 2,1b
		blr
		2: li r3,0
		blr


		/*