x64, x2apic/intr-remap: Interrupt-remapping and x2apic support, fix

[linux-2.6-omap-h63xx.git] / arch / x86 / kernel / vsyscall_64.c

diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c
index b6be812fac0502cd2caccc19dcec0a147a0dc3fa..c87cbd84c3e521ca92a567c751bc852a74239122 100644 (file)
--- a/arch/x86/kernel/vsyscall_64.c
+++ b/arch/x86/kernel/vsyscall_64.c
@@ -216,16 +216,25 @@ vgetcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache)
        return 0;
 }
 
-long __vsyscall(3) venosys_1(void)
+static long __vsyscall(3) venosys_1(void)
 {
        return -ENOSYS;
 }
 
 #ifdef CONFIG_SYSCTL
+
+static int
+vsyscall_sysctl_change(ctl_table *ctl, int write, struct file * filp,
+                      void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+       return proc_dointvec(ctl, write, filp, buffer, lenp, ppos);
+}
+
 static ctl_table kernel_table2[] = {
        { .procname = "vsyscall64",
          .data = &vsyscall_gtod_data.sysctl_enabled, .maxlen = sizeof(int),
-         .mode = 0644 },
+         .mode = 0644,
+         .proc_handler = vsyscall_sysctl_change },
        {}
 };
 
@@ -240,7 +249,7 @@ static ctl_table kernel_root_table2[] = {
    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);
@@ -251,11 +260,11 @@ static void __cpuinit vsyscall_set_cpu(int cpu)
        /* 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)