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kthread: silence bogus section mismatch warning 

WARNING: kernel/built-in.o(.text+0x16910): Section mismatch:
reference to .init.text: (between 'kthreadd' and 'init_waitqueue_head')

comes 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 kthreadd_setup()
with just one callsite and 4 lines in it (it's been that small since
10ab825bde) doesn't need to be a separate function at all -- so let's
just move those four lines at beginning of kthreadd() itself.

Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Acked-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Satyam Sharma 2007-07-31 00:39:16 -07:00 committed by Linus Torvalds
parent bbe06f6bf7
commit e804a4a4dd
1 changed files with 2 additions and 10 deletions
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12
kernel/kthread.c
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@ -214,23 +214,15 @@ int kthread_stop(struct task_struct *k)
} }
EXPORT_SYMBOL(kthread_stop); EXPORT_SYMBOL(kthread_stop);
int kthreadd(void *unused)
static noinline __init_refok void kthreadd_setup(void)
{ {
struct task_struct *tsk = current; struct task_struct *tsk = current;
/* Setup a clean context for our children to inherit. */
set_task_comm(tsk, "kthreadd"); set_task_comm(tsk, "kthreadd");
ignore_signals(tsk); ignore_signals(tsk);
set_user_nice(tsk, -5); set_user_nice(tsk, -5);
set_cpus_allowed(tsk, CPU_MASK_ALL); 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; current->flags |= PF_NOFREEZE;