x86: DS cleanup - dont treat 0 as NULL

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 9 insertions, 9 deletions

diff --git a/arch/x86/kernel/ds.c b/arch/x86/kernel/ds.c
index 5b32b6d062b4..24a323c95997 100644
--- a/arch/x86/kernel/ds.c
+++ b/arch/x86/kernel/ds.c
@@ -238,12 +238,12 @@ static inline struct ds_context *ds_alloc_context(struct task_struct *task)
                 context = kzalloc(sizeof(*context), GFP_KERNEL);
 
                 if (!context)
-                        return 0;
+                        return NULL;
 
                 context->ds = kzalloc(ds_cfg.sizeof_ds, GFP_KERNEL);
                 if (!context->ds) {
                         kfree(context);
-                        return 0;
+                        return NULL;
                 }
 
                 *p_context = context;
@@ -279,7 +279,7 @@ static inline void ds_put_context(struct ds_context *context)
         if (--context->count)
                 goto out;
 
-        *(context->this) = 0;
+        *(context->this) = NULL;
 
         if (context->task)
                 clear_tsk_thread_flag(context->task, TIF_DS_AREA_MSR);
@@ -341,16 +341,16 @@ static inline void *ds_allocate_buffer(size_t size, unsigned int *pages)
         rlim = current->signal->rlim[RLIMIT_AS].rlim_cur >> PAGE_SHIFT;
         vm   = current->mm->total_vm  + pgsz;
         if (rlim < vm)
-                return 0;
+                return NULL;
 
         rlim = current->signal->rlim[RLIMIT_MEMLOCK].rlim_cur >> PAGE_SHIFT;
         vm   = current->mm->locked_vm  + pgsz;
         if (rlim < vm)
-                return 0;
+                return NULL;
 
         buffer = kzalloc(size, GFP_KERNEL);
         if (!buffer)
-                return 0;
+                return NULL;
 
         current->mm->total_vm  += pgsz;
         current->mm->locked_vm += pgsz;
@@ -395,7 +395,7 @@ static int ds_request(struct task_struct *task, void *base, size_t size,
         if (context->owner[qual] == current)
                 goto out_unlock;
         error = -EPERM;
-        if (context->owner[qual] != 0)
+        if (context->owner[qual] != NULL)
                 goto out_unlock;
         context->owner[qual] = current;
 
@@ -445,7 +445,7 @@ static int ds_request(struct task_struct *task, void *base, size_t size,
         return error;
 
  out_release:
-        context->owner[qual] = 0;
+        context->owner[qual] = NULL;
         ds_put_context(context);
         return error;
 
@@ -825,7 +825,7 @@ void __cpuinit ds_init_intel(struct cpuinfo_x86 *c)
                         ds_configure(&ds_cfg_var);
                         break;
                 case 0xF: /* Core2 */
-        case 0x1C: /* Atom */
+                case 0x1C: /* Atom */
                         ds_configure(&ds_cfg_64);
                         break;
                 default: