From: Andrew Morton <akpm@xxxxxxxx>
The KM_BIO_SRC_IRQ kmap slot must be taken with local irqs disabled. Add a
check into scsi for this.
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/scsi_lib.c | 2 ++
1 file changed, 2 insertions(+)
diff -puN drivers/scsi/scsi_lib.c~scsi_kmap_atomic_sg-check-that-local-irqs-are-disabled drivers/scsi/scsi_lib.c
--- a/drivers/scsi/scsi_lib.c~scsi_kmap_atomic_sg-check-that-local-irqs-are-disabled
+++ a/drivers/scsi/scsi_lib.c
@@ -2250,6 +2250,8 @@ void *scsi_kmap_atomic_sg(struct scatter
size_t sg_len = 0, len_complete = 0;
struct page *page;
+ WARN_ON(!irqs_disabled());
+
for (i = 0; i < sg_count; i++) {
len_complete = sg_len; /* Complete sg-entries */
sg_len += sg[i].length;
_
-
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