linux-kernel - [PATCH] lightnvm: introduce ADDR

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Message-Id: <1461681318-29571-1-git-send-email-javier@javigon.com>
Date:	Tue, 26 Apr 2016 16:35:16 +0200
From:	"Javier González" <jg@...htnvm.io>
To:	mb@...htnvm.io
Cc:	linux-kernel@...r.kernel.org, linux-block@...r.kernel.org,
	Javier González <javier@...xlabs.com>
Subject: [PATCH] lightnvm: introduce ADDR_PADDED to signal padding

When REQ_FUA or REQ_FLUSH are sent from the block layer, a target might
need to pad some sectors in order to meet device constrains. ADDR_PADDED
allows to signal that such sector has been padded. It can be used to
mark both lbas and ppas.

Signed-off-by: Javier González <javier@...xlabs.com>
---
 include/linux/lightnvm.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/lightnvm.h b/include/linux/lightnvm.h
index 37cda94..5c48207 100644
--- a/include/linux/lightnvm.h
+++ b/include/linux/lightnvm.h
@@ -214,6 +214,7 @@ struct nvm_tgt_instance {
 };
 
 #define ADDR_EMPTY (~0ULL)
+#define ADDR_PADDED (~0ULL - 1)
 
 #define NVM_VERSION_MAJOR 1
 #define NVM_VERSION_MINOR 0
-- 
2.5.0