SG: clear termination bit in sg_chain()
Since we are using the last entry in the list, clear any possible
termination bit that may have already been set. Pointed out by Rusty.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/include/linux/scatterlist.h b/include/linux/scatterlist.h
index 4571231..b2ec842 100644
--- a/include/linux/scatterlist.h
+++ b/include/linux/scatterlist.h
@@ -179,7 +179,11 @@
#ifndef ARCH_HAS_SG_CHAIN
BUG();
#endif
- prv[prv_nents - 1].page_link = (unsigned long) sgl | 0x01;
+ /*
+ * Set lowest bit to indicate a link pointer, and make sure to clear
+ * the termination bit if it happens to be set.
+ */
+ prv[prv_nents - 1].page_link = ((unsigned long) sgl | 0x01) & ~0x02;
}
/**