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percpu: fix percpu accessors to potentially !cpu_possible() cpus: pnpbios

PATCH In review Rusty Russell 1 participant 1 message Nov 21, 2008 Pnp support

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Rusty Russell

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PATCH 2/3 percpu: fix percpu accessors to potentially !cpu_possible() cpus: pnpbios

Impact: CPU iterator bugfixes

Percpu areas are only allocated for possible cpus. In general, you shouldn't access random cpu's percpu areas.

Signed-off-by Rusty Russell <[email protected]>
Signed-off-by Mike Travis <[email protected]>
Acked-by Ingo Molnar <[email protected]>
Cc Adam Belay <[email protected]>
---
 drivers/pnp/pnpbios/bioscalls.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
drivers/pnp/pnpbios/bioscalls.c +1 -1
diff -r
@@ -481,7 +481,7 @@ void pnpbios_calls_init(union pnp_bios_i
 
 	set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
 	_set_limit((char *)&bad_bios_desc, 4095 - (0x40 << 4));
-	for (i = 0; i < NR_CPUS; i++) {
+	for_each_possible_cpu(i) {
 		struct desc_struct *gdt = get_cpu_gdt_table(i);
 		if (!gdt)
 			continue;