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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-06-25 06:19:01 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-08 13:10:26 +0200 |
| commit | fc8b8a60ffa7c89da58c75109dacf0b2798c7caf (patch) | |
| tree | 7dad86ec633e9958c16ac7a3af779e6a19da05a3 /arch/x86/kernel/vsyscall_64.c | |
| parent | x86: remove open-coded save/load segment operations (diff) | |
| download | linux-fc8b8a60ffa7c89da58c75109dacf0b2798c7caf.tar.xz linux-fc8b8a60ffa7c89da58c75109dacf0b2798c7caf.zip | |
x86, 64-bit: use write_gdt_entry in vsyscall_set_cpu
Use write_gdt_entry to generate the special vgetcpu descriptor in the
vsyscall page.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>
Cc: Stephen Tweedie <sct@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/vsyscall_64.c')
| -rw-r--r-- | arch/x86/kernel/vsyscall_64.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/arch/x86/kernel/vsyscall_64.c b/arch/x86/kernel/vsyscall_64.c index 61efa2f7d564..c87cbd84c3e5 100644 --- a/arch/x86/kernel/vsyscall_64.c +++ b/arch/x86/kernel/vsyscall_64.c @@ -249,7 +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); @@ -260,11 +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) |