scsi: flip the default on use_clustering

Most SCSI drivers want to enable "clustering", that is merging of
segments so that they might span more than a single page.  Remove the
ENABLE_CLUSTERING define, and require drivers to explicitly set
DISABLE_CLUSTERING to disable this feature.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

1 files changed, 0 insertions, 2 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 38c95d66ab12..68133842e6d7 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -135,7 +135,6 @@ enum {
 
         ATA_SHT_EMULATED        = 1,
         ATA_SHT_THIS_ID         = -1,
-        ATA_SHT_USE_CLUSTERING  = 1,
 
         /* struct ata_taskfile flags */
         ATA_TFLAG_LBA48         = (1 << 0), /* enable 48-bit LBA and "HOB" */
@@ -1360,7 +1359,6 @@ extern struct device_attribute *ata_common_sdev_attrs[];
         .tag_alloc_policy       = BLK_TAG_ALLOC_RR,             \
         .this_id                = ATA_SHT_THIS_ID,              \
         .emulated               = ATA_SHT_EMULATED,             \
-        .use_clustering         = ATA_SHT_USE_CLUSTERING,       \
         .proc_name              = drv_name,                     \
         .slave_configure        = ata_scsi_slave_config,        \
         .slave_destroy          = ata_scsi_slave_destroy,       \