The patch titled
Subject: mm: export mmu notifier invalidates
has been added to the -mm tree. Its filename is
mm-export-mmu-notifier-invalidates.patch
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From: Cliff Wickman <cpw@xxxxxxx>
Subject: mm: export mmu notifier invalidates
We at SGI have a need to address some very high physical address ranges
with our GRU (global reference unit), sometimes across partitioned machine
boundaries and sometimes with larger addresses than the cpu supports. We
do this with the aid of our own 'extended vma' module which mimics the
vma. When something (either unmap or exit) frees an 'extended vma' we use
the mmu notifiers to clean them up.
We had been able to mimic the functions
__mmu_notifier_invalidate_range_start() and
__mmu_notifier_invalidate_range_end() by locking the per-mm lock and
walking the per-mm notifier list. But with the change to a global srcu
lock (static in mmu_notifier.c) we can no longer do that. Our module has
no access to that lock.
So we request that these two functions be exported.
Signed-off-by: Cliff Wickman <cpw@xxxxxxx>
Acked-by: Robin Holt <holt@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmu_notifier.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN mm/mmu_notifier.c~mm-export-mmu-notifier-invalidates mm/mmu_notifier.c
--- a/mm/mmu_notifier.c~mm-export-mmu-notifier-invalidates
+++ a/mm/mmu_notifier.c
@@ -172,6 +172,7 @@ void __mmu_notifier_invalidate_range_sta
}
srcu_read_unlock(&srcu, id);
}
+EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range_start);
void __mmu_notifier_invalidate_range_end(struct mm_struct *mm,
unsigned long start, unsigned long end)
@@ -187,6 +188,7 @@ void __mmu_notifier_invalidate_range_end
}
srcu_read_unlock(&srcu, id);
}
+EXPORT_SYMBOL_GPL(__mmu_notifier_invalidate_range_end);
static int do_mmu_notifier_register(struct mmu_notifier *mn,
struct mm_struct *mm,
_
Patches currently in -mm which might be from cpw@xxxxxxx are
linux-next.patch
mm-export-mmu-notifier-invalidates.patch
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