linux-kernel - [PATCH -next] zram: fix printk formats in zram

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Date:   Thu, 3 May 2018 11:21:06 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     LKML <linux-kernel@...r.kernel.org>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        axboe@...nel.dk
Cc:     Nitin Gupta <ngupta@...are.org>, Minchan Kim <minchan@...nel.org>,
        Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Subject: [PATCH -next] zram: fix printk formats in zram_drv.c

From: Randy Dunlap <rdunlap@...radead.org>

Fix printk format warnings (seen on i386 build):

../drivers/block/zram/zram_drv.c:678:4: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘ssize_t’ [-Wformat=]
../drivers/block/zram/zram_drv.c:678:4: warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument 5 has type ‘time64_t’ [-Wformat=]

time64_t is 64 bits (and signed), so printing it should use %lld,
not %ld.  %ld (long) is only 32 bits on several architectures.

Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Cc: Nitin Gupta <ngupta@...are.org>
Cc: Minchan Kim <minchan@...nel.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
---
 drivers/block/zram/zram_drv.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20180503.orig/drivers/block/zram/zram_drv.c
+++ linux-next-20180503/drivers/block/zram/zram_drv.c
@@ -671,7 +671,7 @@ static ssize_t read_block_state(struct f
 
 		ts = ktime_to_timespec64(zram->table[index].ac_time);
 		copied = snprintf(kbuf + written, count,
-			"%12lu %12lu.%06lu %c%c%c\n",
+			"%12zd %12lld.%06lu %c%c%c\n",
 			index, ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC,
 			zram_test_flag(zram, index, ZRAM_SAME) ? 's' : '.',
 			zram_test_flag(zram, index, ZRAM_WB) ? 'w' : '.',