reserve 64bit resources on x86_64

PATCH New Eric W. Biederman 1 participant 1 message Aug 20, 2004

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Eric W. Biederman

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2004-08-20 08:39 UTC #0 lore raw

PATCH 1/1 reserve 64bit resources on x86_64

Andi,

The hack from the i386 kernel to not reserve 64bit resource regions appears to have made it into x86_64. Since struct resource is 64bit on 64bit architectures this is completely unnecessary, and dangerous if the kernel ever assigns a 64bit BAR.

Eric

arch/x86_64/kernel/e820.c +0 -2

diff -uNr linux-2.6.8.1-ioapic-virtwire-on-shutdown.x86_64/arch/x86_64/kernel/e820.c linux-2.6.8.1-e820-64bit.x86_64/arch/x86_64/kernel/e820.c
@@ -185,8 +185,6 @@
 	int i;
 	for (i = 0; i < e820.nr_map; i++) {
 		struct resource *res;
-		if (e820.map[i].addr + e820.map[i].size > 0x100000000ULL)
-			continue;
 		res = alloc_bootmem_low(sizeof(struct resource));
 		switch (e820.map[i].type) {
 		case E820_RAM:	res->name = "System RAM"; break;