[RFC PATCH 20/20] arch: Remove dummy mmiowb() definitions from arch code

From: Will Deacon
Date: Fri Feb 22 2019 - 13:51:48 EST


Now that no driver code is using mmiowb() directly, we can remove the
dummy definitions from the architectures that don't make use of
asm-generic/io.h

Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
---
arch/alpha/include/asm/io.h | 2 --
arch/hexagon/include/asm/io.h | 2 --
arch/parisc/include/asm/io.h | 2 --
arch/sparc/include/asm/io_64.h | 2 --
4 files changed, 8 deletions(-)

diff --git a/arch/alpha/include/asm/io.h b/arch/alpha/include/asm/io.h
index 4c533fc94d62..ccf9d65166bb 100644
--- a/arch/alpha/include/asm/io.h
+++ b/arch/alpha/include/asm/io.h
@@ -513,8 +513,6 @@ extern inline void writeq(u64 b, volatile void __iomem *addr)
#define writel_relaxed(b, addr) __raw_writel(b, addr)
#define writeq_relaxed(b, addr) __raw_writeq(b, addr)

-#define mmiowb()
-
/*
* String version of IO memory access ops:
*/
diff --git a/arch/hexagon/include/asm/io.h b/arch/hexagon/include/asm/io.h
index e17262ad125e..3d0ae09c2b8e 100644
--- a/arch/hexagon/include/asm/io.h
+++ b/arch/hexagon/include/asm/io.h
@@ -184,8 +184,6 @@ static inline void writel(u32 data, volatile void __iomem *addr)
#define writew_relaxed __raw_writew
#define writel_relaxed __raw_writel

-#define mmiowb()
-
/*
* Need an mtype somewhere in here, for cache type deals?
* This is probably too long for an inline.
diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h
index afe493b23d04..b163043d49db 100644
--- a/arch/parisc/include/asm/io.h
+++ b/arch/parisc/include/asm/io.h
@@ -229,8 +229,6 @@ static inline void writeq(unsigned long long q, volatile void __iomem *addr)
#define writel_relaxed(l, addr) writel(l, addr)
#define writeq_relaxed(q, addr) writeq(q, addr)

-#define mmiowb() do { } while (0)
-
void memset_io(volatile void __iomem *addr, unsigned char val, int count);
void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
void memcpy_toio(volatile void __iomem *dst, const void *src, int count);
diff --git a/arch/sparc/include/asm/io_64.h b/arch/sparc/include/asm/io_64.h
index b162c23ae8c2..688911051b44 100644
--- a/arch/sparc/include/asm/io_64.h
+++ b/arch/sparc/include/asm/io_64.h
@@ -396,8 +396,6 @@ static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
}
}

-#define mmiowb()
-
#ifdef __KERNEL__

/* On sparc64 we have the whole physical IO address space accessible
--
2.11.0