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x86/xen: Free bootmem in free_p2m_page() during early boot 

With recent changes in p2m we now have legitimate cases when
p2m memory needs to be freed during early boot (i.e. before
slab is initialized).

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Boris Ostrovsky 2015-01-07 09:08:54 -05:00 committed by David Vrabel
parent 8b8cd8a367
commit 701a261ad6
1 changed files with 6 additions and 3 deletions
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9
arch/x86/xen/p2m.c
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@ -167,10 +167,13 @@ static void * __ref alloc_p2m_page(void)
return (void *)__get_free_page(GFP_KERNEL | __GFP_REPEAT);
}
/* Only to be called in case of a race for a page just allocated! */
static void free_p2m_page(void *p)
static void __ref free_p2m_page(void *p)
{
BUG_ON(!slab_is_available());
if (unlikely(!slab_is_available())) {
free_bootmem((unsigned long)p, PAGE_SIZE);
return;
}
free_page((unsigned long)p);
}