linux-kernel - [PATCH 5/9] scsi/st: Use get_unaligned_signed

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Date:   Mon, 28 Oct 2019 13:06:56 -0700
From:   Bart Van Assche <bvanassche@....org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Christoph Hellwig <hch@....de>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        Bart Van Assche <bvanassche@....org>,
        Kai Makisara <Kai.Makisara@...umbus.fi>,
        "James E . J . Bottomley" <jejb@...ux.ibm.com>
Subject: [PATCH 5/9] scsi/st: Use get_unaligned_signed_be24()

Use this function instead of open-coding it.

Cc: Kai Makisara <Kai.Makisara@...umbus.fi>
Cc: James E.J. Bottomley <jejb@...ux.ibm.com>
Cc: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Bart Van Assche <bvanassche@....org>
---
 drivers/scsi/st.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index e3266a64a477..53dc7706c935 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -44,6 +44,7 @@ static const char *verstr = "20160209";
 
 #include <linux/uaccess.h>
 #include <asm/dma.h>
+#include <asm/unaligned.h>
 
 #include <scsi/scsi.h>
 #include <scsi/scsi_dbg.h>
@@ -2679,8 +2680,7 @@ static void deb_space_print(struct scsi_tape *STp, int direction, char *units, u
 	if (!debugging)
 		return;
 
-	sc = cmd[2] & 0x80 ? 0xff000000 : 0;
-	sc |= (cmd[2] << 16) | (cmd[3] << 8) | cmd[4];
+	sc = get_unaligned_signed_be24(&cmd[2]);
 	if (direction)
 		sc = -sc;
 	st_printk(ST_DEB_MSG, STp, "Spacing tape %s over %d %s.\n",
-- 
2.24.0.rc0.303.g954a862665-goog