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Date:   Mon, 12 Jul 2021 07:20:46 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Guenter Roeck <linux@roeck-us.net>
Cc:     Linus Torvalds <torvalds@linux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>
Subject: Re: Linux 5.14-rc1
Message-ID: <20210712052046.GB8042@lst.de>
References: <CAHk-=wjB5XBk4obhMPfrU3mnOakV9VgHAYOo-ZGJnB2X0DnBWA@mail.gmail.com> <20210712015619.GA3547193@roeck-us.net> <20210712041423.GA97217@roeck-us.net>
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On Sun, Jul 11, 2021 at 09:14:23PM -0700, Guenter Roeck wrote:
> My guess was correct. Bisect points to the above commit. Bisect log as well
> as complete backtrace and example qemu command attached.
> 
> Copying Christoph and Jens.

This should fіx it:

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 6d2d63629a90..b8d55af763f9 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -98,11 +98,7 @@ MODULE_ALIAS_SCSI_DEVICE(TYPE_MOD);
 MODULE_ALIAS_SCSI_DEVICE(TYPE_RBC);
 MODULE_ALIAS_SCSI_DEVICE(TYPE_ZBC);
 
-#if !defined(CONFIG_DEBUG_BLOCK_EXT_DEVT)
 #define SD_MINORS	16
-#else
-#define SD_MINORS	0
-#endif
 
 static void sd_config_discard(struct scsi_disk *, unsigned int);
 static void sd_config_write_same(struct scsi_disk *);