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

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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>
This commit is contained in:
Rusty Russell 2009-01-01 10:12:14 +10:30
parent e9690a6e4b
commit 6aaa8ce523
1 changed files with 1 additions and 1 deletions
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2
drivers/pnp/pnpbios/bioscalls.c
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@ -481,7 +481,7 @@ void pnpbios_calls_init(union pnp_bios_install_struct *header)
set_base(bad_bios_desc, __va((unsigned long)0x40 << 4)); set_base(bad_bios_desc, __va((unsigned long)0x40 << 4));
_set_limit((char *)&bad_bios_desc, 4095 - (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); struct desc_struct *gdt = get_cpu_gdt_table(i);
if (!gdt) if (!gdt)
continue; continue;