um: take ldt.h to arch/x86/um/asm/mm_context.h

it's x86-only and we have no business playing with it in asm/mmu.h; make
the latter have
	struct uml_arch_mm_context arch;
instead of
	struct uml_ldt ldt;
and let arch/<subarch>/um/asm/mm_context.h decide what'll be in there.
While we are at it, kill host_ldt.h - it's not needed in part of places
that include it (we want asm/ldt.h in those) and it can be trivially
expanded into the single remaining one.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/arch/um/include/asm/mmu.h b/arch/um/include/asm/mmu.h
index b1a7e47..30509b9 100644 (file)
--- a/arch/um/include/asm/mmu.h
+++ b/arch/um/include/asm/mmu.h
@@ -7,11 +7,11 @@
 #define __ARCH_UM_MMU_H
 
 #include "mm_id.h"
-#include "ldt.h"
+#include <asm/mm_context.h>
 
 typedef struct mm_context {
        struct mm_id id;
-       struct uml_ldt ldt;
+       struct uml_arch_mm_context arch;
        struct page **stub_pages;
 } mm_context_t;
 

diff --git a/arch/um/include/shared/ldt.h b/arch/um/include/shared/ldt.h
deleted file mode 100644 (file)
index a7f999a..0000000
--- a/arch/um/include/shared/ldt.h
+++ /dev/null
@@ -1,37 +0,0 @@
-/*
- * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
- * Licensed under the GPL
- *
- * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
- */
-
-#ifndef __ASM_LDT_H
-#define __ASM_LDT_H
-
-#include <linux/mutex.h>
-#include <sysdep/host_ldt.h>
-
-extern void ldt_host_info(void);
-
-#define LDT_PAGES_MAX \
-       ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
-#define LDT_ENTRIES_PER_PAGE \
-       (PAGE_SIZE/LDT_ENTRY_SIZE)
-#define LDT_DIRECT_ENTRIES \
-       ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
-
-struct ldt_entry {
-       __u32 a;
-       __u32 b;
-};
-
-typedef struct uml_ldt {
-       int entry_count;
-       struct mutex lock;
-       union {
-               struct ldt_entry * pages[LDT_PAGES_MAX];
-               struct ldt_entry entries[LDT_DIRECT_ENTRIES];
-       } u;
-} uml_ldt_t;
-
-#endif

diff --git a/arch/x86/um/shared/sysdep/host_ldt.h b/arch/x86/um/asm/mm_context.h
similarity index 55%
rename from arch/x86/um/shared/sysdep/host_ldt.h
rename to arch/x86/um/asm/mm_context.h
index 246ff7a..4a73d63 100644 (file)
--- a/arch/x86/um/shared/sysdep/host_ldt.h
+++ b/arch/x86/um/asm/mm_context.h
@@ -1,8 +1,39 @@
-#ifndef __ASM_HOST_LDT_H
-#define __ASM_HOST_LDT_H
+/*
+ * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
+ * Licensed under the GPL
+ *
+ * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
+ */
 
+#ifndef __ASM_LDT_H
+#define __ASM_LDT_H
+
+#include <linux/mutex.h>
 #include <asm/ldt.h>
 
+extern void ldt_host_info(void);
+
+#define LDT_PAGES_MAX \
+       ((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)
+#define LDT_ENTRIES_PER_PAGE \
+       (PAGE_SIZE/LDT_ENTRY_SIZE)
+#define LDT_DIRECT_ENTRIES \
+       ((LDT_PAGES_MAX*sizeof(void *))/LDT_ENTRY_SIZE)
+
+struct ldt_entry {
+       __u32 a;
+       __u32 b;
+};
+
+typedef struct uml_ldt {
+       int entry_count;
+       struct mutex lock;
+       union {
+               struct ldt_entry * pages[LDT_PAGES_MAX];
+               struct ldt_entry entries[LDT_DIRECT_ENTRIES];
+       } u;
+} uml_ldt_t;
+
 #define LDT_entry_a(info) \
        ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
 
@@ -34,4 +65,8 @@
 #define LDT_empty(info) (_LDT_empty(info))
 #endif
 
+struct uml_arch_mm_context {
+       uml_ldt_t ldt;
+};
+
 #endif

diff --git a/arch/x86/um/asm/processor_32.h b/arch/x86/um/asm/processor_32.h
index e5b72fa..c4078b5 100644 (file)
--- a/arch/x86/um/asm/processor_32.h
+++ b/arch/x86/um/asm/processor_32.h
@@ -7,8 +7,8 @@
 #define __UM_PROCESSOR_I386_H
 
 #include <linux/string.h>
-#include <sysdep/host_ldt.h>
 #include <asm/segment.h>
+#include <asm/ldt.h>
 
 extern int host_has_cmov;
 

diff --git a/arch/x86/um/ldt.c b/arch/x86/um/ldt.c
index 3f2bf20..26b0e39 100644 (file)
--- a/arch/x86/um/ldt.c
+++ b/arch/x86/um/ldt.c
@@ -137,7 +137,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount)
 {
        int i, err = 0;
        unsigned long size;
-       uml_ldt_t * ldt = &current->mm->context.ldt;
+       uml_ldt_t *ldt = &current->mm->context.arch.ldt;
 
        if (!ldt->entry_count)
                goto out;
@@ -205,7 +205,7 @@ static int read_default_ldt(void __user * ptr, unsigned long bytecount)
 
 static int write_ldt(void __user * ptr, unsigned long bytecount, int func)
 {
-       uml_ldt_t * ldt = &current->mm->context.ldt;
+       uml_ldt_t *ldt = &current->mm->context.arch.ldt;
        struct mm_id * mm_idp = &current->mm->context.id;
        int i, err;
        struct user_desc ldt_info;
@@ -397,7 +397,7 @@ long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
 
 
        if (!ptrace_ldt)
-               mutex_init(&new_mm->ldt.lock);
+               mutex_init(&new_mm->arch.ldt.lock);
 
        if (!from_mm) {
                memset(&desc, 0, sizeof(desc));
@@ -429,7 +429,7 @@ long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
                                        break;
                        }
                }
-               new_mm->ldt.entry_count = 0;
+               new_mm->arch.ldt.entry_count = 0;
 
                goto out;
        }
@@ -457,26 +457,26 @@ long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
                 * i.e., we have to use the stub for modify_ldt, which
                 * can't handle the big read buffer of up to 64kB.
                 */
-               mutex_lock(&from_mm->ldt.lock);
-               if (from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES)
-                       memcpy(new_mm->ldt.u.entries, from_mm->ldt.u.entries,
-                              sizeof(new_mm->ldt.u.entries));
+               mutex_lock(&from_mm->arch.ldt.lock);
+               if (from_mm->arch.ldt.entry_count <= LDT_DIRECT_ENTRIES)
+                       memcpy(new_mm->arch.ldt.u.entries, from_mm->arch.ldt.u.entries,
+                              sizeof(new_mm->arch.ldt.u.entries));
                else {
-                       i = from_mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE;
+                       i = from_mm->arch.ldt.entry_count / LDT_ENTRIES_PER_PAGE;
                        while (i-->0) {
                                page = __get_free_page(GFP_KERNEL|__GFP_ZERO);
                                if (!page) {
                                        err = -ENOMEM;
                                        break;
                                }
-                               new_mm->ldt.u.pages[i] =
+                               new_mm->arch.ldt.u.pages[i] =
                                        (struct ldt_entry *) page;
-                               memcpy(new_mm->ldt.u.pages[i],
-                                      from_mm->ldt.u.pages[i], PAGE_SIZE);
+                               memcpy(new_mm->arch.ldt.u.pages[i],
+                                      from_mm->arch.ldt.u.pages[i], PAGE_SIZE);
                        }
                }
-               new_mm->ldt.entry_count = from_mm->ldt.entry_count;
-               mutex_unlock(&from_mm->ldt.lock);
+               new_mm->arch.ldt.entry_count = from_mm->arch.ldt.entry_count;
+               mutex_unlock(&from_mm->arch.ldt.lock);
        }
 
     out:
@@ -488,12 +488,12 @@ void free_ldt(struct mm_context *mm)
 {
        int i;
 
-       if (!ptrace_ldt && mm->ldt.entry_count > LDT_DIRECT_ENTRIES) {
-               i = mm->ldt.entry_count / LDT_ENTRIES_PER_PAGE;
+       if (!ptrace_ldt && mm->arch.ldt.entry_count > LDT_DIRECT_ENTRIES) {
+               i = mm->arch.ldt.entry_count / LDT_ENTRIES_PER_PAGE;
                while (i-- > 0)
-                       free_page((long) mm->ldt.u.pages[i]);
+                       free_page((long) mm->arch.ldt.u.pages[i]);
        }
-       mm->ldt.entry_count = 0;
+       mm->arch.ldt.entry_count = 0;
 }
 
 int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)

diff --git a/arch/x86/um/shared/sysdep/tls.h b/arch/x86/um/shared/sysdep/tls.h
index f2f30bd..27cce00 100644 (file)
--- a/arch/x86/um/shared/sysdep/tls.h
+++ b/arch/x86/um/shared/sysdep/tls.h
@@ -24,7 +24,6 @@ typedef struct um_dup_user_desc {
 
 # else /* __KERNEL__ */
 
-#  include <ldt.h>
 typedef struct user_desc user_desc_t;
 
 # endif /* __KERNEL__ */