We allocate an array of nr_cpu_ids pointers, so we should respect its bonds. Delay change of _cpu_pda after array initialization. Also take into account that alloc_bootmem_low() : - calls panic() if not enough memory - already clears allocated memory Signed-off-by: Eric Dumazet Signed-off-by: Mike Travis --- arch/x86/kernel/head64.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -151,18 +151,16 @@ void __init x86_64_start_kernel(char * r void __init x86_64_cleanup_pda(void) { int i; + struct x8664_pda **new_cpu_pda; - _cpu_pda = alloc_bootmem_low(nr_cpu_ids * sizeof(void *)); + new_cpu_pda = alloc_bootmem_low(nr_cpu_ids * sizeof(void *)); - if (!_cpu_pda) - panic("Cannot allocate cpu pda table\n"); + for (i = 0; i < nr_cpu_ids; i++) + if (_cpu_pda_init[i] != &boot_cpu_pda[i]) + new_cpu_pda[i] = _cpu_pda_init[i]; + mb(); + _cpu_pda = new_cpu_pda; /* cpu_pda() now points to allocated cpu_pda_table */ - - for (i = 0; i < NR_CPUS; i++) - if (_cpu_pda_init[i] == &boot_cpu_pda[i]) - cpu_pda(i) = NULL; - else - cpu_pda(i) = _cpu_pda_init[i]; } #endif -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/