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frv: Use correct size for task_struct allocation

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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
This commit is contained in:
Thomas Gleixner
2012-05-03 09:02:47 +00:00
parent 43a18b1e58
commit cce4517f33
1 changed files with 2 additions and 7 deletions
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7
arch/frv/kernel/process.c
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@@ -45,16 +45,11 @@ EXPORT_SYMBOL(pm_power_off);
struct task_struct *alloc_task_struct_node(int node) struct task_struct *alloc_task_struct_node(int node)
{ {
struct task_struct *p = kmalloc_node(THREAD_SIZE, GFP_KERNEL, node); return kmalloc_node(sizeof(task_struct), GFP_KERNEL, node);
if (p)
atomic_set((atomic_t *)(p+1), 1);
return p;
} }
void free_task_struct(struct task_struct *p) void free_task_struct(struct task_struct *p)
{ {
if (atomic_dec_and_test((atomic_t *)(p+1)))
kfree(p); kfree(p);
} }