The patch titled
mm-add-swap-slot-free-callback-to-block_device_operations-fix
has been added to the -mm tree. Its filename is
mm-add-swap-slot-free-callback-to-block_device_operations-fix.patch
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: mm-add-swap-slot-free-callback-to-block_device_operations-fix
From: Nitin Gupta <ngupta@xxxxxxxxxx>
A block device makes swap_slot_free_notify() callback when the last
reference to a swap slot is dropped.
This callback is made under swap_lock and sometimes page table lock. This
is a note of warning for registered callback function which must meet
these constraints.
Signed-off-by: Nitin Gupta <ngupta@xxxxxxxxxx>
Signed-off-by: Hugh Dickins <hugh.dickins@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/blkdev.h | 1 +
1 file changed, 1 insertion(+)
diff -puN include/linux/blkdev.h~mm-add-swap-slot-free-callback-to-block_device_operations-fix include/linux/blkdev.h
--- a/include/linux/blkdev.h~mm-add-swap-slot-free-callback-to-block_device_operations-fix
+++ a/include/linux/blkdev.h
@@ -1294,6 +1294,7 @@ struct block_device_operations {
unsigned long long);
int (*revalidate_disk) (struct gendisk *);
int (*getgeo)(struct block_device *, struct hd_geometry *);
+ /* this callback is with swap_lock and sometimes page table lock held */
void (*swap_slot_free_notify) (struct block_device *, unsigned long);
struct module *owner;
};
_
Patches currently in -mm which might be from ngupta@xxxxxxxxxx are
mm-add-swap-slot-free-callback-to-block_device_operations.patch
mm-add-swap-slot-free-callback-to-block_device_operations-fix.patch
ramzswap-use-slot-free-callback-to-eliminate-stale-data.patch
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