x86: x86 TLS desc_struct cleanup

This cleans up the TLS code to use struct desc_struct and to separate the
encoding and installation magic from the interface wrappers.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 9 insertions, 2 deletions

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index e17581ad8824..5b6a05d3a771 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -7,7 +7,8 @@
 #include <asm/mmu.h>
 #include <linux/smp.h>
 
-static inline void fill_ldt(struct desc_struct *desc, struct user_desc *info)
+static inline void fill_ldt(struct desc_struct *desc,
+                            const struct user_desc *info)
 {
         desc->limit0 = info->limit & 0x0ffff;
         desc->base0 = info->base_addr & 0x0000ffff;
@@ -275,10 +276,16 @@ static inline void load_LDT(mm_context_t *pc)
         preempt_enable();
 }
 
-static inline unsigned long get_desc_base(struct desc_struct *desc)
+static inline unsigned long get_desc_base(const struct desc_struct *desc)
 {
         return desc->base0 | ((desc->base1) << 16) | ((desc->base2) << 24);
 }
+
+static inline unsigned long get_desc_limit(const struct desc_struct *desc)
+{
+        return desc->limit0 | (desc->limit << 16);
+}
+
 static inline void _set_gate(int gate, unsigned type, void *addr,
                               unsigned dpl, unsigned ist, unsigned seg)
 {