linux-kernel - [PATCH 04/10] staging: slicoss: slic.h: add a macro IOMEM_GET

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Message-Id: <62de4cf8ac3f837d2828cbee3b075b9cbe102bcd.1473821899.git.sironhide0null@gmail.com>
Date:   Tue, 13 Sep 2016 19:59:53 -0700
From:   Peng Sun <sironhide0null@...il.com>
To:     liodot@...il.com, charrer@...critech.com,
        gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Peng Sun <sironhide0null@...il.com>
Subject: [PATCH 04/10] staging: slicoss: slic.h: add a macro IOMEM_GET_FIELD64 to fix sparse warnings

Signed-off-by: Peng Sun <sironhide0null@...il.com>
---
 drivers/staging/slicoss/slic.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/staging/slicoss/slic.h b/drivers/staging/slicoss/slic.h
index 4c22863..b9595c4 100644
--- a/drivers/staging/slicoss/slic.h
+++ b/drivers/staging/slicoss/slic.h
@@ -560,6 +560,31 @@ static inline void slic_flush_write(struct adapter *adapter)
 	iowrite32(value, _base);					\
 })
 
+#ifdef CONFIG_64BIT
+#define IOMEM_GET_FIELD64(base, member)					\
+({									\
+	char __iomem *_base = (char __iomem *)base;			\
+	_base += offsetof(typeof(*base), member);			\
+	readq(_base);							\
+})
+#else
+#define IOMEM_GET_FIELD64(base, member)					\
+({									\
+	char __iomem *_base = (char __iomem *)base;			\
+	u64 val;							\
+	_base += offsetof(typeof(*base), member);			\
+	val = ((u64)ioread8(_base + 7)) << 56;				\
+	val += ((u64)ioread8(_base + 6)) << 48;				\
+	val += ((u64)ioread8(_base + 5)) << 40;				\
+	val += ((u64)ioread8(_base + 4)) << 32;				\
+	val += ((u64)ioread8(_base + 3)) << 24;				\
+	val += ((u64)ioread8(_base + 2)) << 16;				\
+	val += ((u64)ioread8(_base + 1)) << 8;				\
+	val += ioread8(_base);						\
+	le64_to_cpu(val);						\
+})
+#endif
+
 #define UPDATE_STATS(largestat, newstat, oldstat)                        \
 {                                                                        \
 	if ((newstat) < (oldstat))                                       \
-- 
2.7.4