From: Bart Van Assche <bvanassche@acm.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, Christoph Hellwig <hch@lst.de>,
Bart Van Assche <bvanassche@acm.org>,
Ming Lei <ming.lei@redhat.com>, Hannes Reinecke <hare@suse.de>,
Omar Sandoval <osandov@fb.com>
Subject: [PATCH] sbitmap: Fix sbitmap_put()
Date: Mon, 15 Mar 2021 20:54:20 -0700 [thread overview]
Message-ID: <20210316035420.2584-1-bvanassche@acm.org> (raw)
This patch fixes the following kernel warning:
BUG: using smp_processor_id() in preemptible [00000000] code: scsi_eh_0/152
caller is debug_smp_processor_id+0x17/0x20
CPU: 1 PID: 152 Comm: scsi_eh_0 Tainted: G W 5.12.0-rc1-dbg+ #6
Call Trace:
show_stack+0x52/0x58
dump_stack+0xaf/0xf3
check_preemption_disabled+0xce/0xd0
debug_smp_processor_id+0x17/0x20
scsi_device_unbusy+0x13a/0x1c0 [scsi_mod]
scsi_finish_command+0x4d/0x290 [scsi_mod]
scsi_eh_flush_done_q+0x1e7/0x280 [scsi_mod]
ata_scsi_port_error_handler+0x592/0x750 [libata]
ata_scsi_error+0x1a0/0x1f0 [libata]
scsi_error_handler+0x19e/0x330 [scsi_mod]
kthread+0x222/0x250
ret_from_fork+0x1f/0x30
Cc: Ming Lei <ming.lei@redhat.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Omar Sandoval <osandov@fb.com>
Fixes: c548e62bcf6a ("scsi: sbitmap: Move allocation hint into sbitmap")
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
---
include/linux/sbitmap.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/sbitmap.h b/include/linux/sbitmap.h
index 3087e1f15fdd..2713e689ad66 100644
--- a/include/linux/sbitmap.h
+++ b/include/linux/sbitmap.h
@@ -324,7 +324,7 @@ static inline void sbitmap_put(struct sbitmap *sb, unsigned int bitnr)
sbitmap_deferred_clear_bit(sb, bitnr);
if (likely(sb->alloc_hint && !sb->round_robin && bitnr < sb->depth))
- *this_cpu_ptr(sb->alloc_hint) = bitnr;
+ *raw_cpu_ptr(sb->alloc_hint) = bitnr;
}
static inline int sbitmap_test_bit(struct sbitmap *sb, unsigned int bitnr)
next reply other threads:[~2021-03-16 3:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 3:54 Bart Van Assche [this message]
2021-03-16 6:35 ` [PATCH] sbitmap: Fix sbitmap_put() Ming Lei
2021-03-16 14:32 ` Jens Axboe
2021-03-16 19:37 ` Bart Van Assche
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