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Subject[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 <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Adam Belay <ambx1@neo.rr.com>
---
drivers/pnp/pnpbios/bioscalls.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff -r
--- test-compile.orig/drivers/pnp/pnpbios/bioscalls.c
+++ test-compile/drivers/pnp/pnpbios/bioscalls.c
@@ -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;



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