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-rw-r--r--drivers/scsi/osst.c2
-rw-r--r--drivers/scsi/st.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 664c1238a87f..be3c73ebbfde 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -139,7 +139,7 @@ static int debugging = 1;
#define OSST_TIMEOUT (200 * HZ)
#define OSST_LONG_TIMEOUT (1800 * HZ)
-#define TAPE_NR(x) (iminor(x) & ~(-1 << ST_MODE_SHIFT))
+#define TAPE_NR(x) (iminor(x) & ((1 << ST_MODE_SHIFT)-1))
#define TAPE_MODE(x) ((iminor(x) & ST_MODE_MASK) >> ST_MODE_SHIFT)
#define TAPE_REWIND(x) ((iminor(x) & 0x80) == 0)
#define TAPE_IS_RAW(x) (TAPE_MODE(x) & (ST_NBR_MODES >> 1))
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 7c7a742a5ef7..19c022e66d63 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -169,7 +169,7 @@ static int debugging = DEBUG;
/* Remove mode bits and auto-rewind bit (7) */
#define TAPE_NR(x) ( ((iminor(x) & ~255) >> (ST_NBR_MODE_BITS + 1)) | \
- (iminor(x) & ~(-1 << ST_MODE_SHIFT)) )
+ (iminor(x) & ((1 << ST_MODE_SHIFT)-1)))
#define TAPE_MODE(x) ((iminor(x) & ST_MODE_MASK) >> ST_MODE_SHIFT)
/* Construct the minor number from the device (d), mode (m), and non-rewind (n) data */