1 files changed, 60 insertions, 74 deletions

diff --git a/arch/um/kernel/skas/uaccess.c b/arch/um/kernel/skas/uaccess.c
index b14422e2c07c..1d8b119f2d0e 100644
--- a/arch/um/kernel/skas/uaccess.c
+++ b/arch/um/kernel/skas/uaccess.c
@@ -1,18 +1,14 @@
 /*
- * Copyright (C) 2002 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
 
-#include "linux/compiler.h"
-#include "linux/stddef.h"
-#include "linux/kernel.h"
-#include "linux/string.h"
-#include "linux/fs.h"
-#include "linux/hardirq.h"
+#include "linux/err.h"
 #include "linux/highmem.h"
+#include "linux/mm.h"
+#include "asm/current.h"
 #include "asm/page.h"
 #include "asm/pgtable.h"
-#include "asm/uaccess.h"
 #include "kern_util.h"
 #include "os.h"
 
@@ -27,16 +23,16 @@ static unsigned long maybe_map(unsigned long virt, int is_write)
         void *phys = um_virt_to_phys(current, virt, &pte);
         int dummy_code;
 
-        if(IS_ERR(phys) || (is_write && !pte_write(pte))){
+        if (IS_ERR(phys) || (is_write && !pte_write(pte))) {
                 err = handle_page_fault(virt, 0, is_write, 1, &dummy_code);
-                if(err)
-                        return(-1UL);
+                if (err)
+                        return -1UL;
                 phys = um_virt_to_phys(current, virt, NULL);
         }
-        if(IS_ERR(phys))
-                phys = (void *) -1;
+        if (IS_ERR(phys))
+                phys = (void *) -1;
 
-        return((unsigned long) phys);
+        return (unsigned long) phys;
 }
 
 static int do_op_one_page(unsigned long addr, int len, int is_write,
@@ -46,17 +42,18 @@ static int do_op_one_page(unsigned long addr, int len, int is_write,
         int n;
 
         addr = maybe_map(addr, is_write);
-        if(addr == -1UL)
-                return(-1);
+        if (addr == -1UL)
+                return -1;
 
         page = phys_to_page(addr);
-        addr = (unsigned long) kmap_atomic(page, KM_UML_USERCOPY) + (addr & ~PAGE_MASK);
+        addr = (unsigned long) kmap_atomic(page, KM_UML_USERCOPY) +
+                (addr & ~PAGE_MASK);
 
         n = (*op)(addr, len, arg);
 
         kunmap_atomic(page, KM_UML_USERCOPY);
 
-        return(n);
+        return n;
 }
 
 static void do_buffer_op(void *jmpbuf, void *arg_ptr)
@@ -81,21 +78,21 @@ static void do_buffer_op(void *jmpbuf, void *arg_ptr)
 
         current->thread.fault_catcher = jmpbuf;
         n = do_op_one_page(addr, size, is_write, op, arg);
-        if(n != 0){
+        if (n != 0) {
                 *res = (n < 0 ? remain : 0);
                 goto out;
         }
 
         addr += size;
         remain -= size;
-        if(remain == 0){
+        if (remain == 0) {
                 *res = 0;
                 goto out;
         }
 
-        while(addr < ((addr + remain) & PAGE_MASK)){
+        while(addr < ((addr + remain) & PAGE_MASK)) {
                 n = do_op_one_page(addr, PAGE_SIZE, is_write, op, arg);
-                if(n != 0){
+                if (n != 0) {
                         *res = (n < 0 ? remain : 0);
                         goto out;
                 }
@@ -103,13 +100,13 @@ static void do_buffer_op(void *jmpbuf, void *arg_ptr)
                 addr += PAGE_SIZE;
                 remain -= PAGE_SIZE;
         }
-        if(remain == 0){
+        if (remain == 0) {
                 *res = 0;
                 goto out;
         }
 
         n = do_op_one_page(addr, remain, is_write, op, arg);
-        if(n != 0)
+        if (n != 0)
                 *res = (n < 0 ? remain : 0);
         else *res = 0;
  out:
@@ -124,10 +121,10 @@ static int buffer_op(unsigned long addr, int len, int is_write,
 
         faulted = setjmp_wrapper(do_buffer_op, addr, len, is_write, op, arg,
                                  &res);
-        if(!faulted)
-                return(res);
+        if (!faulted)
+                return res;
 
-        return(addr + len - (unsigned long) current->thread.fault_addr);
+        return addr + len - (unsigned long) current->thread.fault_addr;
 }
 
 static int copy_chunk_from_user(unsigned long from, int len, void *arg)
@@ -136,19 +133,19 @@ static int copy_chunk_from_user(unsigned long from, int len, void *arg)
 
         memcpy((void *) to, (void *) from, len);
         *to_ptr += len;
-        return(0);
+        return 0;
 }
 
 int copy_from_user(void *to, const void __user *from, int n)
 {
-        if(segment_eq(get_fs(), KERNEL_DS)){
+        if (segment_eq(get_fs(), KERNEL_DS)) {
                 memcpy(to, (__force void*)from, n);
-                return(0);
+                return 0;
         }
 
-        return(access_ok(VERIFY_READ, from, n) ?
+        return access_ok(VERIFY_READ, from, n) ?
                buffer_op((unsigned long) from, n, 0, copy_chunk_from_user, &to):
-               n);
+               n;
 }
 
 static int copy_chunk_to_user(unsigned long to, int len, void *arg)
@@ -157,19 +154,19 @@ static int copy_chunk_to_user(unsigned long to, int len, void *arg)
 
         memcpy((void *) to, (void *) from, len);
         *from_ptr += len;
-        return(0);
+        return 0;
 }
 
 int copy_to_user(void __user *to, const void *from, int n)
 {
-        if(segment_eq(get_fs(), KERNEL_DS)){
-                memcpy((__force void*)to, from, n);
-                return(0);
+        if (segment_eq(get_fs(), KERNEL_DS)) {
+                memcpy((__force void *) to, from, n);
+                return 0;
         }
 
-        return(access_ok(VERIFY_WRITE, to, n) ?
+        return access_ok(VERIFY_WRITE, to, n) ?
                buffer_op((unsigned long) to, n, 1, copy_chunk_to_user, &from) :
-               n);
+               n;
 }
 
 static int strncpy_chunk_from_user(unsigned long from, int len, void *arg)
@@ -181,9 +178,9 @@ static int strncpy_chunk_from_user(unsigned long from, int len, void *arg)
         n = strnlen(to, len);
         *to_ptr += n;
 
-        if(n < len)
-                return(1);
-        return(0);
+        if (n < len)
+                return 1;
+        return 0;
 }
 
 int strncpy_from_user(char *dst, const char __user *src, int count)
@@ -191,41 +188,41 @@ int strncpy_from_user(char *dst, const char __user *src, int count)
         int n;
         char *ptr = dst;
 
-        if(segment_eq(get_fs(), KERNEL_DS)){
-                strncpy(dst, (__force void*)src, count);
-                return(strnlen(dst, count));
+        if (segment_eq(get_fs(), KERNEL_DS)) {
+                strncpy(dst, (__force void *) src, count);
+                return strnlen(dst, count);
         }
 
-        if(!access_ok(VERIFY_READ, src, 1))
-                return(-EFAULT);
+        if (!access_ok(VERIFY_READ, src, 1))
+                return -EFAULT;
 
         n = buffer_op((unsigned long) src, count, 0, strncpy_chunk_from_user,
                       &ptr);
-        if(n != 0)
-                return(-EFAULT);
-        return(strnlen(dst, count));
+        if (n != 0)
+                return -EFAULT;
+        return strnlen(dst, count);
 }
 
 static int clear_chunk(unsigned long addr, int len, void *unused)
 {
         memset((void *) addr, 0, len);
-        return(0);
+        return 0;
 }
 
 int __clear_user(void __user *mem, int len)
 {
-        return(buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL));
+        return buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL);
 }
 
 int clear_user(void __user *mem, int len)
 {
-        if(segment_eq(get_fs(), KERNEL_DS)){
+        if (segment_eq(get_fs(), KERNEL_DS)) {
                 memset((__force void*)mem, 0, len);
-                return(0);
+                return 0;
         }
 
-        return(access_ok(VERIFY_WRITE, mem, len) ?
-               buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL) : len);
+        return access_ok(VERIFY_WRITE, mem, len) ?
+               buffer_op((unsigned long) mem, len, 1, clear_chunk, NULL) : len;
 }
 
 static int strnlen_chunk(unsigned long str, int len, void *arg)
@@ -235,31 +232,20 @@ static int strnlen_chunk(unsigned long str, int len, void *arg)
         n = strnlen((void *) str, len);
         *len_ptr += n;
 
-        if(n < len)
-                return(1);
-        return(0);
+        if (n < len)
+                return 1;
+        return 0;
 }
 
 int strnlen_user(const void __user *str, int len)
 {
         int count = 0, n;
 
-        if(segment_eq(get_fs(), KERNEL_DS))
-                return(strnlen((__force char*)str, len) + 1);
+        if (segment_eq(get_fs(), KERNEL_DS))
+                return strnlen((__force char*)str, len) + 1;
 
         n = buffer_op((unsigned long) str, len, 0, strnlen_chunk, &count);
-        if(n == 0)
-                return(count + 1);
-        return(-EFAULT);
+        if (n == 0)
+                return count + 1;
+        return -EFAULT;
 }
-
-/*
- * Overrides for Emacs so that we follow Linus's tabbing style.
- * Emacs will notice this stuff at the end of the file and automatically
- * adjust the settings for this buffer only.  This must remain at the end
- * of the file.
- * ---------------------------------------------------------------------------
- * Local variables:
- * c-file-style: "linux"
- * End:
- */