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Commit 6aaa8ce5 authored by Rusty Russell's avatar Rusty Russell
Browse files

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: default avatarRusty Russell <rusty@rustcorp.com.au>
Signed-off-by: default avatarMike Travis <travis@sgi.com>
Acked-by: default avatarIngo Molnar <mingo@elte.hu>
Cc: Adam Belay <ambx1@neo.rr.com>
parent e9690a6e

drivers/pnp/pnpbios/bioscalls.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -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;