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authorDavid Woodhouse <David.Woodhouse@intel.com>2008-08-05 18:08:25 +0100
committerJens Axboe <jens.axboe@oracle.com>2008-10-09 08:56:01 +0200
commiteae9acd13a8d14b50c00a961fa959606f34bbd92 (patch)
treecbd16bf7fe9db99f6916408953c6243aca175121 /include
parent8c540a96c175bdf55bda8707db04cec78b816454 (diff)
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Support 'discard sectors' operation in translation layer support core
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'include')
-rw-r--r--include/linux/blkdev.h1
-rw-r--r--include/linux/mtd/blktrans.h2
2 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 26ececbbebe2..727886d25c4e 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -81,6 +81,7 @@ enum {
*/
REQ_LB_OP_EJECT = 0x40, /* eject request */
REQ_LB_OP_FLUSH = 0x41, /* flush device */
+ REQ_LB_OP_DISCARD = 0x42, /* discard sectors */
};
/*
diff --git a/include/linux/mtd/blktrans.h b/include/linux/mtd/blktrans.h
index 310e61606415..8b4aa0523db7 100644
--- a/include/linux/mtd/blktrans.h
+++ b/include/linux/mtd/blktrans.h
@@ -41,6 +41,8 @@ struct mtd_blktrans_ops {
unsigned long block, char *buffer);
int (*writesect)(struct mtd_blktrans_dev *dev,
unsigned long block, char *buffer);
+ int (*discard)(struct mtd_blktrans_dev *dev,
+ unsigned long block, unsigned nr_blocks);
/* Block layer ioctls */
int (*getgeo)(struct mtd_blktrans_dev *dev, struct hd_geometry *geo);