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e820: check for newer *e820= variable (old e820= might get removed in the future)

--- a/sys/src/9/pc/memory.c

+++ b/sys/src/9/pc/memory.c

@@ -650,8 +650,9 @@

 	int i;

 	/* passed by bootloader */

-	if((s = getconf("e820")) == nil)

-		return -1;

+	if((s = getconf("*e820")) == nil)

+		if((s = getconf("e820")) == nil)

+			return -1;

 	for(nemap = 0; nemap < nelem(emap); nemap++){

 		if(*s == 0)

 			break;

-- 

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