x86: clean up arch/x86/kernel/ldt_32/64.c

White space and coding style clenaup.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 69 insertions, 60 deletions

diff --git a/arch/x86/kernel/ldt_32.c b/arch/x86/kernel/ldt_32.c
index 9ff90a27c45..e366c5fd0d1 100644
--- a/arch/x86/kernel/ldt_32.c
+++ b/arch/x86/kernel/ldt_32.c
@@ -17,7 +17,7 @@
 #include <asm/desc.h>
 #include <asm/mmu_context.h>
 
-#ifdef CONFIG_SMP /* avoids "defined but not used" warnig */
+#ifdef CONFIG_SMP
 static void flush_ldt(void *null)
 {
         if (current->active_mm)
@@ -34,19 +34,20 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
         if (mincount <= pc->size)
                 return 0;
         oldsize = pc->size;
-        mincount = (mincount+511)&(~511);
-        if (mincount*LDT_ENTRY_SIZE > PAGE_SIZE)
-                newldt = vmalloc(mincount*LDT_ENTRY_SIZE);
+        mincount = (mincount + 511) & (~511);
+        if (mincount * LDT_ENTRY_SIZE > PAGE_SIZE)
+                newldt = vmalloc(mincount * LDT_ENTRY_SIZE);
         else
-                newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL);
+                newldt = kmalloc(mincount * LDT_ENTRY_SIZE, GFP_KERNEL);
 
         if (!newldt)
                 return -ENOMEM;
 
         if (oldsize)
-                memcpy(newldt, pc->ldt, oldsize*LDT_ENTRY_SIZE);
+                memcpy(newldt, pc->ldt, oldsize * LDT_ENTRY_SIZE);
         oldldt = pc->ldt;
-        memset(newldt+oldsize*LDT_ENTRY_SIZE, 0, (mincount-oldsize)*LDT_ENTRY_SIZE);
+        memset(newldt + oldsize * LDT_ENTRY_SIZE, 0,
+               (mincount - oldsize) * LDT_ENTRY_SIZE);
         pc->ldt = newldt;
         wmb();
         pc->size = mincount;
@@ -55,6 +56,7 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
         if (reload) {
 #ifdef CONFIG_SMP
                 cpumask_t mask;
+
                 preempt_disable();
                 load_LDT(pc);
                 mask = cpumask_of_cpu(smp_processor_id());
@@ -66,7 +68,7 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
 #endif
         }
         if (oldsize) {
-                if (oldsize*LDT_ENTRY_SIZE > PAGE_SIZE)
+                if (oldsize * LDT_ENTRY_SIZE > PAGE_SIZE)
                         vfree(oldldt);
                 else
                         kfree(oldldt);
@@ -77,9 +79,10 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload)
 static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
 {
         int err = alloc_ldt(new, old->size, 0);
+
         if (err < 0)
                 return err;
-        memcpy(new->ldt, old->ldt, old->size*LDT_ENTRY_SIZE);
+        memcpy(new->ldt, old->ldt, old->size * LDT_ENTRY_SIZE);
         return 0;
 }
 
@@ -89,7 +92,7 @@ static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
  */
 int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 {
-        struct mm_struct * old_mm;
+        struct mm_struct *old_mm;
         int retval = 0;
 
         mutex_init(&mm->context.lock);
@@ -111,7 +114,7 @@ void destroy_context(struct mm_struct *mm)
         if (mm->context.size) {
                 if (mm == current->active_mm)
                         clear_LDT();
-                if (mm->context.size*LDT_ENTRY_SIZE > PAGE_SIZE)
+                if (mm->context.size * LDT_ENTRY_SIZE > PAGE_SIZE)
                         vfree(mm->context.ldt);
                 else
                         kfree(mm->context.ldt);
@@ -119,19 +122,19 @@ void destroy_context(struct mm_struct *mm)
         }
 }
 
-static int read_ldt(void __user * ptr, unsigned long bytecount)
+static int read_ldt(void __user *ptr, unsigned long bytecount)
 {
         int err;
         unsigned long size;
-        struct mm_struct * mm = current->mm;
+        struct mm_struct *mm = current->mm;
 
         if (!mm->context.size)
                 return 0;
-        if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
-                bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
+        if (bytecount > LDT_ENTRY_SIZE * LDT_ENTRIES)
+                bytecount = LDT_ENTRY_SIZE * LDT_ENTRIES;
 
         mutex_lock(&mm->context.lock);
-        size = mm->context.size*LDT_ENTRY_SIZE;
+        size = mm->context.size * LDT_ENTRY_SIZE;
         if (size > bytecount)
                 size = bytecount;
 
@@ -143,7 +146,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount)
                 goto error_return;
         if (size != bytecount) {
                 /* zero-fill the rest */
-                if (clear_user(ptr+size, bytecount-size) != 0) {
+                if (clear_user(ptr + size, bytecount - size) != 0) {
                         err = -EFAULT;
                         goto error_return;
                 }
@@ -153,13 +156,13 @@ error_return:
         return err;
 }
 
-static int read_default_ldt(void __user * ptr, unsigned long bytecount)
+static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 {
         int err;
         unsigned long size;
 
         err = 0;
-        size = 5*sizeof(struct desc_struct);
+        size = 5 * sizeof(struct desc_struct);
         if (size > bytecount)
                 size = bytecount;
 
@@ -170,9 +173,9 @@ static int read_default_ldt(void __user * ptr, unsigned long bytecount)
         return err;
 }
 
-static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
+static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
-        struct mm_struct * mm = current->mm;
+        struct mm_struct *mm = current->mm;
         __u32 entry_1, entry_2;
         int error;
         struct user_desc ldt_info;
@@ -180,7 +183,7 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
         error = -EINVAL;
         if (bytecount != sizeof(ldt_info))
                 goto out;
-        error = -EFAULT;        
+        error = -EFAULT;
         if (copy_from_user(&ldt_info, ptr, sizeof(ldt_info)))
                 goto out;
 
@@ -196,13 +199,14 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
 
         mutex_lock(&mm->context.lock);
         if (ldt_info.entry_number >= mm->context.size) {
-                error = alloc_ldt(&current->mm->context, ldt_info.entry_number+1, 1);
+                error = alloc_ldt(&current->mm->context,
+                                  ldt_info.entry_number + 1, 1);
                 if (error < 0)
                         goto out_unlock;
         }
 
-        /* Allow LDTs to be cleared by the user. */
-        if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
+        /* Allow LDTs to be cleared by the user. */
+        if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
                 if (oldmode || LDT_empty(&ldt_info)) {
                         entry_1 = 0;
                         entry_2 = 0;
@@ -217,7 +221,8 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
 
         /* Install the new entry ...  */
 install:
-        write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1, entry_2);
+        write_ldt_entry(mm->context.ldt, ldt_info.entry_number, entry_1,
+                        entry_2);
         error = 0;
 
 out_unlock:
@@ -226,7 +231,8 @@ out:
         return error;
 }
 
-asmlinkage int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
+asmlinkage int sys_modify_ldt(int func, void __user *ptr,
+                              unsigned long bytecount)
 {
         int ret = -ENOSYS;
 
diff --git a/arch/x86/kernel/ldt_64.c b/arch/x86/kernel/ldt_64.c
index 60e57abb8e9..6c41db367de 100644
--- a/arch/x86/kernel/ldt_64.c
+++ b/arch/x86/kernel/ldt_64.c
@@ -2,7 +2,7 @@
  * Copyright (C) 1992 Krishna Balasubramanian and Linus Torvalds
  * Copyright (C) 1999 Ingo Molnar <mingo@redhat.com>
  * Copyright (C) 2002 Andi Kleen
- * 
+ *
  * This handles calls from both 32bit and 64bit mode.
  */
 
@@ -20,11 +20,11 @@
 #include <asm/desc.h>
 #include <asm/proto.h>
 
-#ifdef CONFIG_SMP /* avoids "defined but not used" warnig */
+#ifdef CONFIG_SMP
 static void flush_ldt(void *null)
 {
         if (current->active_mm)
-               load_LDT(&current->active_mm->context);
+                load_LDT(&current->active_mm->context);
 }
 #endif
 
@@ -37,19 +37,20 @@ static int alloc_ldt(mm_context_t *pc, unsigned mincount, int reload)
         if (mincount <= (unsigned)pc->size)
                 return 0;
         oldsize = pc->size;
-        mincount = (mincount+511)&(~511);
-        if (mincount*LDT_ENTRY_SIZE > PAGE_SIZE)
-                newldt = vmalloc(mincount*LDT_ENTRY_SIZE);
+        mincount = (mincount + 511) & (~511);
+        if (mincount * LDT_ENTRY_SIZE > PAGE_SIZE)
+                newldt = vmalloc(mincount * LDT_ENTRY_SIZE);
         else
-                newldt = kmalloc(mincount*LDT_ENTRY_SIZE, GFP_KERNEL);
+                newldt = kmalloc(mincount * LDT_ENTRY_SIZE, GFP_KERNEL);
 
         if (!newldt)
                 return -ENOMEM;
 
         if (oldsize)
-                memcpy(newldt, pc->ldt, oldsize*LDT_ENTRY_SIZE);
+                memcpy(newldt, pc->ldt, oldsize * LDT_ENTRY_SIZE);
         oldldt = pc->ldt;
-        memset(newldt+oldsize*LDT_ENTRY_SIZE, 0, (mincount-oldsize)*LDT_ENTRY_SIZE);
+        memset(newldt + oldsize * LDT_ENTRY_SIZE, 0,
+               (mincount - oldsize) * LDT_ENTRY_SIZE);
         wmb();
         pc->ldt = newldt;
         wmb();
@@ -70,7 +71,7 @@ static int alloc_ldt(mm_context_t *pc, unsigned mincount, int reload)
 #endif
         }
         if (oldsize) {
-                if (oldsize*LDT_ENTRY_SIZE > PAGE_SIZE)
+                if (oldsize * LDT_ENTRY_SIZE > PAGE_SIZE)
                         vfree(oldldt);
                 else
                         kfree(oldldt);
@@ -81,9 +82,10 @@ static int alloc_ldt(mm_context_t *pc, unsigned mincount, int reload)
 static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
 {
         int err = alloc_ldt(new, old->size, 0);
+
         if (err < 0)
                 return err;
-        memcpy(new->ldt, old->ldt, old->size*LDT_ENTRY_SIZE);
+        memcpy(new->ldt, old->ldt, old->size * LDT_ENTRY_SIZE);
         return 0;
 }
 
@@ -93,7 +95,7 @@ static inline int copy_ldt(mm_context_t *new, mm_context_t *old)
  */
 int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 {
-        struct mm_struct * old_mm;
+        struct mm_struct *old_mm;
         int retval = 0;
 
         mutex_init(&mm->context.lock);
@@ -108,13 +110,12 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 }
 
 /*
- * 
  * Don't touch the LDT register - we're already in the next thread.
  */
 void destroy_context(struct mm_struct *mm)
 {
         if (mm->context.size) {
-                if ((unsigned)mm->context.size*LDT_ENTRY_SIZE > PAGE_SIZE)
+                if ((unsigned)mm->context.size * LDT_ENTRY_SIZE > PAGE_SIZE)
                         vfree(mm->context.ldt);
                 else
                         kfree(mm->context.ldt);
@@ -122,19 +123,19 @@ void destroy_context(struct mm_struct *mm)
         }
 }
 
-static int read_ldt(void __user * ptr, unsigned long bytecount)
+static int read_ldt(void __user *ptr, unsigned long bytecount)
 {
         int err;
         unsigned long size;
-        struct mm_struct * mm = current->mm;
+        struct mm_struct *mm = current->mm;
 
         if (!mm->context.size)
                 return 0;
-        if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
-                bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
+        if (bytecount > LDT_ENTRY_SIZE * LDT_ENTRIES)
+                bytecount = LDT_ENTRY_SIZE * LDT_ENTRIES;
 
         mutex_lock(&mm->context.lock);
-        size = mm->context.size*LDT_ENTRY_SIZE;
+        size = mm->context.size * LDT_ENTRY_SIZE;
         if (size > bytecount)
                 size = bytecount;
 
@@ -146,7 +147,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount)
                 goto error_return;
         if (size != bytecount) {
                 /* zero-fill the rest */
-                if (clear_user(ptr+size, bytecount-size) != 0) {
+                if (clear_user(ptr + size, bytecount - size) != 0) {
                         err = -EFAULT;
                         goto error_return;
                 }
@@ -156,21 +157,21 @@ error_return:
         return err;
 }
 
-static int read_default_ldt(void __user * ptr, unsigned long bytecount)
+static int read_default_ldt(void __user *ptr, unsigned long bytecount)
 {
-        /* Arbitrary number */ 
+        /* Arbitrary number */
         /* x86-64 default LDT is all zeros */
-        if (bytecount > 128) 
-                bytecount = 128;        
+        if (bytecount > 128)
+                bytecount = 128;
         if (clear_user(ptr, bytecount))
                 return -EFAULT;
-        return bytecount; 
+        return bytecount;
 }
 
-static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
+static int write_ldt(void __user *ptr, unsigned long bytecount, int oldmode)
 {
         struct task_struct *me = current;
-        struct mm_struct * mm = me->mm;
+        struct mm_struct *mm = me->mm;
         __u32 entry_1, entry_2, *lp;
         int error;
         struct user_desc ldt_info;
@@ -179,7 +180,7 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
 
         if (bytecount != sizeof(ldt_info))
                 goto out;
-        error = -EFAULT;        
+        error = -EFAULT;
         if (copy_from_user(&ldt_info, ptr, bytecount))
                 goto out;
 
@@ -195,15 +196,16 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
 
         mutex_lock(&mm->context.lock);
         if (ldt_info.entry_number >= (unsigned)mm->context.size) {
-                error = alloc_ldt(&current->mm->context, ldt_info.entry_number+1, 1);
+                error = alloc_ldt(&current->mm->context,
+                                  ldt_info.entry_number + 1, 1);
                 if (error < 0)
                         goto out_unlock;
         }
 
-        lp = (__u32 *) ((ldt_info.entry_number << 3) + (char *) mm->context.ldt);
+        lp = (__u32 *)((ldt_info.entry_number << 3) + (char *)mm->context.ldt);
 
-        /* Allow LDTs to be cleared by the user. */
-        if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
+        /* Allow LDTs to be cleared by the user. */
+        if (ldt_info.base_addr == 0 && ldt_info.limit == 0) {
                 if (oldmode || LDT_empty(&ldt_info)) {
                         entry_1 = 0;
                         entry_2 = 0;
@@ -228,7 +230,8 @@ out:
         return error;
 }
 
-asmlinkage int sys_modify_ldt(int func, void __user *ptr, unsigned long bytecount)
+asmlinkage int sys_modify_ldt(int func, void __user *ptr,
+                              unsigned long bytecount)
 {
         int ret = -ENOSYS;