Messages in this thread Patch in this message | | | Date | Thu, 31 Jan 2008 14:16:10 -0800 (PST) | From | Christoph Lameter <> | Subject | Re: mmu_notifier: reduce size of mm_struct if !CONFIG_MMU_NOTIFIER |
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mmu_notifier: Reduce size of mm_struct if !CONFIG_MMU_NOTIFIER
Andrea and Peter had a concern about this.
Use an #ifdef to make the mmu_notifer_head structure empty if we have no notifier. That allows the use of the structure in inline functions (which allows parameter verification even if !CONFIG_MMU_NOTIFIER)
Signed-off-by: Christoph Lameter <clameter@sgi.com>
--- include/linux/mm_types.h | 2 ++ 1 file changed, 2 insertions(+)
Index: linux-2.6/include/linux/mm_types.h =================================================================== --- linux-2.6.orig/include/linux/mm_types.h 2008-01-31 14:03:23.000000000 -0800 +++ linux-2.6/include/linux/mm_types.h 2008-01-31 14:03:38.000000000 -0800 @@ -154,7 +154,9 @@ struct vm_area_struct { }; struct mmu_notifier_head { +#ifdef CONFIG_MMU_NOTIFIER struct hlist_head head; +#endif }; struct mm_struct {
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