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    Subject[PATCH 05 of 36] x86_64: use write_gdt_entry in vsyscall_set_cpu
    Date
    From
    Use write_gdt_entry to generate the special vgetcpu descriptor in the
    vsyscall page.

    Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
    ---
    arch/x86/kernel/vsyscall_64.c | 12 ++++++------
    1 file changed, 6 insertions(+), 6 deletions(-)

    diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
    --- a/arch/x86/kernel/vsyscall_64.c
    +++ b/arch/x86/kernel/vsyscall_64.c
    @@ -250,7 +250,7 @@
    doesn't violate that. We'll find out if it does. */
    static void __cpuinit vsyscall_set_cpu(int cpu)
    {
    - unsigned long *d;
    + unsigned long d;
    unsigned long node = 0;
    #ifdef CONFIG_NUMA
    node = cpu_to_node(cpu);
    @@ -261,11 +261,11 @@
    /* Store cpu number in limit so that it can be loaded quickly
    in user space in vgetcpu.
    12 bits for the CPU and 8 bits for the node. */
    - d = (unsigned long *)(get_cpu_gdt_table(cpu) + GDT_ENTRY_PER_CPU);
    - *d = 0x0f40000000000ULL;
    - *d |= cpu;
    - *d |= (node & 0xf) << 12;
    - *d |= (node >> 4) << 48;
    + d = 0x0f40000000000ULL;
    + d |= cpu;
    + d |= (node & 0xf) << 12;
    + d |= (node >> 4) << 48;
    + write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_PER_CPU, &d, DESCTYPE_S);
    }

    static void __cpuinit cpu_vsyscall_init(void *arg)



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