x86: unify set_tss_desc

This patch unifies the set_tss_desc between i386 and x86_64,
which can now have a common implementation. After the old
functions are removed from desc_{32,64}.h, nothing important is
left, and the files can be removed.

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

3 files changed, 33 insertions, 66 deletions

diff --git a/include/asm-x86/desc.h b/include/asm-x86/desc.h
index d75bc0634313..c31715cf2218 100644
--- a/include/asm-x86/desc.h
+++ b/include/asm-x86/desc.h
@@ -165,6 +165,39 @@ static inline void pack_ldt(ldt_desc *ldt, unsigned long addr,
 #endif
 }
 
+static inline void pack_tss(tss_desc *tss, unsigned long addr,
+                           unsigned size, unsigned entry)
+{
+#ifdef CONFIG_X86_64
+                set_tssldt_descriptor(tss,
+                             addr, entry, size);
+#else
+                pack_descriptor(tss, (unsigned long)addr,
+                                size,
+                                0x80 | entry, 0);
+#endif
+}
+
+static inline void __set_tss_desc(unsigned cpu, unsigned int entry, void *addr)
+{
+        struct desc_struct *d = get_cpu_gdt_table(cpu);
+        tss_desc tss;
+
+        /*
+         * sizeof(unsigned long) coming from an extra "long" at the end
+         * of the iobitmap. See tss_struct definition in processor.h
+         *
+         * -1? seg base+limit should be pointing to the address of the
+         * last valid byte
+         */
+        pack_tss(&tss, (unsigned long)addr,
+                IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1,
+                DESC_TSS);
+        write_gdt_entry(d, entry, &tss, DESC_TSS);
+}
+
+#define set_tss_desc(cpu, addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
+
 static inline void native_set_ldt(const void *addr, unsigned int entries)
 {
         if (likely(entries == 0))
@@ -222,12 +255,6 @@ static inline void native_load_tls(struct thread_struct *t, unsigned int cpu)
                 gdt[GDT_ENTRY_TLS_MIN + i] = t->tls_array[i];
 }
 
-#ifdef CONFIG_X86_32
-# include "desc_32.h"
-#else
-# include "desc_64.h"
-#endif
-
 #define _LDT_empty(info) (\
         (info)->base_addr       == 0    && \
         (info)->limit           == 0    && \
diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h
deleted file mode 100644
index 3b112ec186a0..000000000000
--- a/include/asm-x86/desc_32.h
+++ /dev/null
@@ -1,27 +0,0 @@
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
-
-#include <asm/ldt.h>
-#include <asm/segment.h>
-#include <asm/desc_defs.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/preempt.h>
-#include <linux/percpu.h>
-
-static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr)
-{
-        tss_desc tss;
-        pack_descriptor(&tss, (unsigned long)addr,
-                        offsetof(struct tss_struct, __cacheline_filler) - 1,
-                        DESC_TSS, 0);
-        write_gdt_entry(get_cpu_gdt_table(cpu), entry, &tss, DESC_TSS);
-}
-
-
-#define set_tss_desc(cpu,addr) __set_tss_desc(cpu, GDT_ENTRY_TSS, addr)
-
-#endif /* !__ASSEMBLY__ */
-
-#endif
diff --git a/include/asm-x86/desc_64.h b/include/asm-x86/desc_64.h
index 6bc92e6e5cc3..8b137891791f 100644
--- a/include/asm-x86/desc_64.h
+++ b/include/asm-x86/desc_64.h
@@ -1,34 +1 @@
-/* Written 2000 by Andi Kleen */
-#ifndef __ARCH_DESC_H
-#define __ARCH_DESC_H
 
-#include <linux/threads.h>
-#include <asm/ldt.h>
-
-#ifndef __ASSEMBLY__
-
-#include <linux/string.h>
-
-#include <asm/segment.h>
-
-static inline void set_tss_desc(unsigned cpu, void *addr)
-{
-        struct desc_struct *d = get_cpu_gdt_table(cpu);
-        tss_desc tss;
-
-        /*
-         * sizeof(unsigned long) coming from an extra "long" at the end
-         * of the iobitmap. See tss_struct definition in processor.h
-         *
-         * -1? seg base+limit should be pointing to the address of the
-         * last valid byte
-         */
-        set_tssldt_descriptor(&tss,
-                (unsigned long)addr, DESC_TSS,
-                IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1);
-        write_gdt_entry(d, GDT_ENTRY_TSS, &tss, DESC_TSS);
-}
-
-#endif /* !__ASSEMBLY__ */
-
-#endif