diff options
author | Chuck Ebbert <76306.1226@compuserve.com> | 2006-02-05 10:28:03 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-05 22:06:53 +0300 |
commit | fe38d8553ccb5237bf0eddda9e94fbca7288551c (patch) | |
tree | 4ebdcf473fcf7e429536e86346c258514671f044 /arch/i386/kernel/cpu/amd.c | |
parent | 170aa3d02614ae621d54af10555e2f48977ae8de (diff) | |
download | linux-fe38d8553ccb5237bf0eddda9e94fbca7288551c.tar.xz |
[PATCH] i386 cpu hotplug: don't access freed memory
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>
Diffstat (limited to 'arch/i386/kernel/cpu/amd.c')
-rw-r--r-- | arch/i386/kernel/cpu/amd.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/i386/kernel/cpu/amd.c b/arch/i386/kernel/cpu/amd.c index 333578a4e91a..0810f81f2a05 100644 --- a/arch/i386/kernel/cpu/amd.c +++ b/arch/i386/kernel/cpu/amd.c @@ -282,3 +282,11 @@ int __init amd_init_cpu(void) } //early_arch_initcall(amd_init_cpu); + +static int __init amd_exit_cpu(void) +{ + cpu_devs[X86_VENDOR_AMD] = NULL; + return 0; +} + +late_initcall(amd_exit_cpu); |