Re: [Bug 8679] New: Section mismatch: reference to .init.text

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 6/27/07, Randy Dunlap <[email protected]> wrote:
> [...]
> Software Environment:
> gcc 3.4.6, binutils 2.17
>
> Problem Description:
> Warnings appeared while building kernel:
>
> WARNING: kernel/built-in.o(.text+0x15f84): Section mismatch: reference to
> .init.text: (between 'kthreadd' and 'init_waitqueue_head')
[...]
From: Randy Dunlap <[email protected]>

kthreadd_setup() is in an __init section, but we know that it's
safe to be called from kthreadd() since the latter is only called
at kernel init time, so mark kthreadd_setup() __init_refok so
that modpost won't complain about what text section it is in.

Hi Randy,

__init_refok is for callers, so we should actually be marking kthreadd()
as __init_refok. But I feel kthreadd_setup() doesn't want to be a separate
function at all. This is for 2.6.22-rc6, so kindly apply.

---

From: Satyam Sharma <[email protected]>

> WARNING: kernel/built-in.o(.text+0x15f84): Section mismatch: reference to
> .init.text: (between 'kthreadd' and 'init_waitqueue_head')

is because kernel/kthread.c:kthreadd() is not __init but calls kthreadd_setup()
which is __init. But this is ok, because kthreadd_setup() is only ever called at
init time, and then kthreadd() proceeds into its "for (;;)" loop.

We could mark kthreadd() __init_refok, but I feel kthreadd_setup() with just one
call site and 4 lines in it shouldn't be a separate function at all.
So let's lose it
and code it explicitly in kthreadd() itself.

Signed-off-by: Satyam Sharma <[email protected]>

---

kernel/kthread.c |   12 ++----------
1 file changed, 2 insertions(+), 10 deletions(-)

---

diff -ruNp a/kernel/kthread.c b/kernel/kthread.c
--- a/kernel/kthread.c	2007-06-26 06:33:08.000000000 +0530
+++ b/kernel/kthread.c	2007-06-27 02:57:46.000000000 +0530
@@ -214,23 +214,15 @@ int kthread_stop(struct task_struct *k)
}
EXPORT_SYMBOL(kthread_stop);

-
-static __init void kthreadd_setup(void)
+int kthreadd(void *unused)
{
	struct task_struct *tsk = current;

+	/* Setup a clean context for our children to inherit. */
	set_task_comm(tsk, "kthreadd");
-
	ignore_signals(tsk);
-
	set_user_nice(tsk, -5);
	set_cpus_allowed(tsk, CPU_MASK_ALL);
-}
-
-int kthreadd(void *unused)
-{
-	/* Setup a clean context for our children to inherit. */
-	kthreadd_setup();

	current->flags |= PF_NOFREEZE;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux