forked from luck/tmp_suning_uos_patched
fe38d8553c
i386 CPU init code accesses freed init memory when booting a newly-started
processor after CPU hotplug. The cpu_devs array is searched to find the
vendor and it contains pointers to freed data.
Fix that by:
1. Zeroing entries for freed vendor data after bootup.
2. Changing Transmeta, NSC and UMC to all __init[data].
3. Printing a warning (once only) and setting this_cpu
to a safe default when the vendor is not found.
This does not change behavior for AMD systems. They were broken already
but no error was reported.
Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
42 lines
741 B
C
42 lines
741 B
C
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <asm/processor.h>
|
|
#include "cpu.h"
|
|
|
|
/* UMC chips appear to be only either 386 or 486, so no special init takes place.
|
|
*/
|
|
static void __init init_umc(struct cpuinfo_x86 * c)
|
|
{
|
|
|
|
}
|
|
|
|
static struct cpu_dev umc_cpu_dev __initdata = {
|
|
.c_vendor = "UMC",
|
|
.c_ident = { "UMC UMC UMC" },
|
|
.c_models = {
|
|
{ .vendor = X86_VENDOR_UMC, .family = 4, .model_names =
|
|
{
|
|
[1] = "U5D",
|
|
[2] = "U5S",
|
|
}
|
|
},
|
|
},
|
|
.c_init = init_umc,
|
|
};
|
|
|
|
int __init umc_init_cpu(void)
|
|
{
|
|
cpu_devs[X86_VENDOR_UMC] = &umc_cpu_dev;
|
|
return 0;
|
|
}
|
|
|
|
//early_arch_initcall(umc_init_cpu);
|
|
|
|
static int __init umc_exit_cpu(void)
|
|
{
|
|
cpu_devs[X86_VENDOR_UMC] = NULL;
|
|
return 0;
|
|
}
|
|
|
|
late_initcall(umc_exit_cpu);
|