This is a note to let you know that I've just added the patch titled
frv: Use correct size for task_struct allocation
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
frv-use-correct-size-for-task_struct-allocation.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From cce4517f33384c3794c759e206cc8e1bb6df146b Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Thu, 3 May 2012 09:02:47 +0000
Subject: frv: Use correct size for task_struct allocation
From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
commit cce4517f33384c3794c759e206cc8e1bb6df146b upstream.
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@xxxxxxxxxxxxx>
Acked-by: David Howells <dhowells@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20120503085033.898475542@xxxxxxxxxxxxx
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/frv/kernel/process.c | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
--- a/arch/frv/kernel/process.c
+++ b/arch/frv/kernel/process.c
@@ -46,17 +46,12 @@ 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)
Patches currently in stable-queue which might be from tglx@xxxxxxxxxxxxx are
queue-3.4/futex-take-hugepages-into-account-when-generating-futex_key.patch
queue-3.4/frv-use-core-allocator-for-task_struct.patch
queue-3.4/frv-use-correct-size-for-task_struct-allocation.patch
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