frv: Use correct size for task_struct allocation

alloc_task_struct_node() allocates THREAD_SIZE and maintains some
weird refcount in the allocated memory. This never blew up as
task_struct size on 32bit machines was always less than THREAD_SIZE

Allocate just sizeof(struct task_struct) and get rid of the magic
refcounting.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: David Howells <dhowells@redhat.com>
Link: http://lkml.kernel.org/r/20120503085033.898475542@linutronix.de

diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c
index d4de48bd5efe4211990ec7530e25ad95e97819ad..1ac84b2e5a0f222613ee6a47f26c803786c231bb 100644 (file)
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -45,17 +45,12 @@ EXPORT_SYMBOL(pm_power_off);
 
 struct task_struct *alloc_task_struct_node(int node)
 {
-       struct task_struct *p = kmalloc_node(THREAD_SIZE, GFP_KERNEL, node);
-
-       if (p)
-               atomic_set((atomic_t *)(p+1), 1);
-       return p;
+       return kmalloc_node(sizeof(task_struct), GFP_KERNEL, node);
 }
 
 void free_task_struct(struct task_struct *p)
 {
-       if (atomic_dec_and_test((atomic_t *)(p+1)))
-               kfree(p);
+       kfree(p);
 }
 
 static void core_sleep_idle(void)