UML - Fold mmu_context_skas into mm_context

Index: linux-2.6.22/arch/um/include/tlb.h
===================================================================
@@ -33,7 +33,7 @@ struct host_vm_op {
 extern void force_flush_all(void);
 extern void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
                              unsigned long end_addr, int force,
-			     int (*do_ops)(union mm_context *,
+			     int (*do_ops)(struct mm_context *,
 					   struct host_vm_op *, int, int,
 					   void **));
 extern int flush_tlb_kernel_range_common(unsigned long start,

Index: linux-2.6.22/arch/um/include/um_mmu.h
===================================================================
@@ -7,10 +7,22 @@
 #define __ARCH_UM_MMU_H
 
 #include "uml-config.h"
-#include "mmu-skas.h"
+#include "mm_id.h"
+#include "asm/ldt.h"
 
-typedef union mm_context {
-	struct mmu_context_skas skas;
+typedef struct mm_context {
+	struct mm_id id;
+	unsigned long last_page_table;
+#ifdef CONFIG_3_LEVEL_PGTABLES
+	unsigned long last_pmd;
+#endif
+	struct uml_ldt ldt;
 } mm_context_t;
 
+extern void __switch_mm(struct mm_id * mm_idp);
+
+/* Avoid tangled inclusion with asm/ldt.h */
+extern long init_new_ldt(struct mm_context *to_mm, struct mm_context *from_mm);
+extern void free_ldt(struct mm_context *mm);
+
 #endif

111 lines not on this page · raw message

Index: linux-2.6.22/arch/um/kernel/exec.c
===================================================================
@@ -23,14 +23,14 @@ void flush_thread(void)
 
 	arch_flush_thread(&current->thread.arch);
 
-	ret = unmap(&current->mm->context.skas.id, 0, end, 1, &data);
+	ret = unmap(&current->mm->context.id, 0, end, 1, &data);
 	if (ret) {
 		printk(KERN_ERR "flush_thread - clearing address space failed, "
 		       "err = %d\n", ret);
 		force_sig(SIGKILL, current);
 	}
 
-	__switch_mm(&current->mm->context.skas.id);
+	__switch_mm(&current->mm->context.id);
 }
 
 void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)

Index: linux-2.6.22/arch/um/kernel/reboot.c
===================================================================
@@ -25,7 +25,7 @@ static void kill_off_processes(void)
 			if(p->mm == NULL)
 				continue;
 
-			pid = p->mm->context.skas.id.u.pid;
+			pid = p->mm->context.id.u.pid;
 			os_kill_ptraced_process(pid, 1);
 		}
 	}

Index: linux-2.6.22/arch/um/kernel/skas/mmu.c
===================================================================
@@ -47,9 +47,9 @@ static int init_stub_pte(struct mm_struc
 	 * destroy_context_skas.
 	 */
 
-	mm->context.skas.last_page_table = pmd_page_vaddr(*pmd);
+	mm->context.last_page_table = pmd_page_vaddr(*pmd);
 #ifdef CONFIG_3_LEVEL_PGTABLES
-	mm->context.skas.last_pmd = (unsigned long) __va(pud_val(*pud));
+	mm->context.last_pmd = (unsigned long) __va(pud_val(*pud));
 #endif
 
 	*pte = mk_pte(virt_to_page(kernel), __pgprot(_PAGE_PRESENT));

@@ -66,8 +66,8 @@ static int init_stub_pte(struct mm_struc
 
 int init_new_context(struct task_struct *task, struct mm_struct *mm)
 {
-	struct mmu_context_skas *from_mm = NULL;
-	struct mmu_context_skas *to_mm = &mm->context.skas;
+ 	struct mm_context *from_mm = NULL;
+	struct mm_context *to_mm = &mm->context;
 	unsigned long stack = 0;
 	int ret = -ENOMEM;
 

@@ -97,7 +97,7 @@ int init_new_context(struct task_struct 
 
 	to_mm->id.stack = stack;
 	if (current->mm != NULL && current->mm != &init_mm)
-		from_mm = &current->mm->context.skas;
+		from_mm = &current->mm->context;
 
 	if (proc_mm) {
 		ret = new_mm(stack);

@@ -133,7 +133,7 @@ int init_new_context(struct task_struct 
 
 void destroy_context(struct mm_struct *mm)
 {
-	struct mmu_context_skas *mmu = &mm->context.skas;
+	struct mm_context *mmu = &mm->context;
 
 	if (proc_mm)
 		os_close_file(mmu->id.u.mm_fd);

Index: linux-2.6.22/arch/um/kernel/skas/process.c
===================================================================
@@ -65,5 +65,5 @@ unsigned long current_stub_stack(void)
 	if (current->mm == NULL)
 		return 0;
 
-	return current->mm->context.skas.id.stack;
+	return current->mm->context.id.stack;
 }

Index: linux-2.6.22/arch/um/sys-i386/ldt.c
===================================================================
@@ -33,7 +33,7 @@ long write_ldt_entry(struct mm_id * mm_i
 		 * Note: I'm unsure: should interrupts be disabled here?
 		 */
 		if (!current->active_mm || current->active_mm == &init_mm ||
-		    mm_idp != &current->active_mm->context.skas.id)
+		    mm_idp != &current->active_mm->context.id)
 			__switch_mm(mm_idp);
 	}
 

@@ -79,8 +79,8 @@ long write_ldt_entry(struct mm_id * mm_i
 		 * PTRACE_LDT possible to implement.
 		 */
 		if (current->active_mm && current->active_mm != &init_mm &&
-		    mm_idp != &current->active_mm->context.skas.id)
-			__switch_mm(&current->active_mm->context.skas.id);
+		    mm_idp != &current->active_mm->context.id)
+			__switch_mm(&current->active_mm->context.id);
 	}
 
 	return res;

@@ -135,7 +135,7 @@ static int read_ldt(void __user * ptr, u
 {
 	int i, err = 0;
 	unsigned long size;
-	uml_ldt_t * ldt = &current->mm->context.skas.ldt;
+	uml_ldt_t * ldt = &current->mm->context.ldt;
 
 	if (!ldt->entry_count)
 		goto out;

@@ -203,8 +203,8 @@ static int read_default_ldt(void __user 
 
 static int write_ldt(void __user * ptr, unsigned long bytecount, int func)
 {
-	uml_ldt_t * ldt = &current->mm->context.skas.ldt;
-	struct mm_id * mm_idp = &current->mm->context.skas.id;
+	uml_ldt_t * ldt = &current->mm->context.ldt;
+	struct mm_id * mm_idp = &current->mm->context.id;
 	int i, err;
 	struct user_desc ldt_info;
 	struct ldt_entry entry0, *ldt_p;

@@ -384,8 +384,7 @@ out_free:
 	free_pages((unsigned long)ldt, order);
 }
 
-long init_new_ldt(struct mmu_context_skas * new_mm,
-		  struct mmu_context_skas * from_mm)
+long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
 {
 	struct user_desc desc;
 	short * num_p;

@@ -483,7 +482,7 @@ long init_new_ldt(struct mmu_context_ska
 }
 
 
-void free_ldt(struct mmu_context_skas * mm)
+void free_ldt(struct mm_context *mm)
 {
 	int i;
 

Index: linux-2.6.22/include/asm-um/ldt.h
===================================================================
@@ -11,11 +11,7 @@
 #include "asm/semaphore.h"
 #include "asm/host_ldt.h"
 
-struct mmu_context_skas;
 extern void ldt_host_info(void);
-extern long init_new_ldt(struct mmu_context_skas * to_mm,
-			 struct mmu_context_skas * from_mm);
-extern void free_ldt(struct mmu_context_skas * mm);
 
 #define LDT_PAGES_MAX \
 	((LDT_ENTRIES * LDT_ENTRY_SIZE)/PAGE_SIZE)

Index: linux-2.6.22/include/asm-um/mmu_context.h
===================================================================
@@ -29,7 +29,7 @@ static inline void activate_mm(struct mm
 	 * possible.
 	 */
 	if (old != new && (current->flags & PF_BORROWED_MM))
-		__switch_mm(&new->context.skas.id);
+		__switch_mm(&new->context.id);
 }
 
 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, 

@@ -41,7 +41,7 @@ static inline void switch_mm(struct mm_s
 		cpu_clear(cpu, prev->cpu_vm_mask);
 		cpu_set(cpu, next->cpu_vm_mask);
 		if(next != &init_mm)
-			__switch_mm(&next->context.skas.id);
+			__switch_mm(&next->context.id);
 	}
 }
 

Index: linux-2.6.22/arch/um/include/skas/mmu-skas.h
===================================================================
@@ -1,23 +0,0 @@
-/*
- * Copyright (C) 2002 Jeff Dike ([email protected])
- * Licensed under the GPL
- */
-
-#ifndef __SKAS_MMU_H
-#define __SKAS_MMU_H
-
-#include "mm_id.h"
-#include "asm/ldt.h"
-
-struct mmu_context_skas {
-	struct mm_id id;
-	unsigned long last_page_table;
-#ifdef CONFIG_3_LEVEL_PGTABLES
-	unsigned long last_pmd;
-#endif
-	uml_ldt_t ldt;
-};
-
-extern void __switch_mm(struct mm_id * mm_idp);
-
-#endif

Index: linux-2.6.22/arch/um/sys-x86_64/syscalls.c
===================================================================
@@ -30,7 +30,7 @@ long arch_prctl(struct task_struct *task
 {
 	unsigned long *ptr = addr, tmp;
 	long ret;
-	int pid = task->mm->context.skas.id.u.pid;
+	int pid = task->mm->context.id.u.pid;
 
 	/*
 	 * With ARCH_SET_FS (and ARCH_SET_GS is treated similarly to