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From: Bjorn Helgaas <helgaas@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Bjorn Helgaas <bhelgaas@google.com>,
	Yoshinori Sato <ysato@users.sourceforge.jp>,
	Rich Felker <dalias@libc.org>,
	linux-sh@vger.kernel.org
Subject: [PATCH 1/3] sh: remove unused SLOW_DOWN_IO
Date: Thu, 13 Oct 2022 19:19:09 -0500	[thread overview]
Message-ID: <20221014001911.3342485-2-helgaas@kernel.org> (raw)
In-Reply-To: <20221014001911.3342485-1-helgaas@kernel.org>

From: Bjorn Helgaas <bhelgaas@google.com>

io.h defines SLOW_DOWN_IO only when CONF_SLOWDOWN_IO is defined, but
CONF_SLOWDOWN_IO is never defined and is in fact explicitly undefined.
Remove SLOW_DOWN_IO and related code.

N.B. 37b7a97884ba ("sh: machvec IO death.") went to some trouble to add
CONF_SLOWDOWN_IO and SLOW_DOWN_IO, for no obvious reason.  Maybe there was
some out-of-tree case that used this.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: linux-sh@vger.kernel.org
---
 arch/sh/include/asm/io.h | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index fba90e670ed4..8d2df499b2fc 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -121,11 +121,6 @@ __BUILD_MEMORY_STRING(__raw_, q, u64)
 
 #ifdef CONFIG_HAS_IOPORT_MAP
 
-/*
- * Slowdown I/O port space accesses for antique hardware.
- */
-#undef CONF_SLOWDOWN_IO
-
 /*
  * On SuperH I/O ports are memory mapped, so we access them using normal
  * load/store instructions. sh_io_port_base is the virtual address to
@@ -145,13 +140,7 @@ static inline void __set_io_port_base(unsigned long pbase)
 extern void __iomem *__ioport_map(unsigned long addr, unsigned int size);
 #endif
 
-#ifdef CONF_SLOWDOWN_IO
-#define SLOW_DOWN_IO __raw_readw(sh_io_port_base)
-#else
-#define SLOW_DOWN_IO
-#endif
-
-#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p, slow)			\
+#define __BUILD_IOPORT_SINGLE(pfx, bwlq, type, p)			\
 									\
 static inline void pfx##out##bwlq##p(type val, unsigned long port)	\
 {									\
@@ -159,7 +148,6 @@ static inline void pfx##out##bwlq##p(type val, unsigned long port)	\
 									\
 	__addr = __ioport_map(port, sizeof(type));			\
 	*__addr = val;							\
-	slow;								\
 }									\
 									\
 static inline type pfx##in##bwlq##p(unsigned long port)			\
@@ -169,14 +157,13 @@ static inline type pfx##in##bwlq##p(unsigned long port)			\
 									\
 	__addr = __ioport_map(port, sizeof(type));			\
 	__val = *__addr;						\
-	slow;								\
 									\
 	return __val;							\
 }
 
 #define __BUILD_IOPORT_PFX(bus, bwlq, type)				\
 	__BUILD_IOPORT_SINGLE(bus, bwlq, type, ,)			\
-	__BUILD_IOPORT_SINGLE(bus, bwlq, type, _p, SLOW_DOWN_IO)
+	__BUILD_IOPORT_SINGLE(bus, bwlq, type, _p,)
 
 #define BUILDIO_IOPORT(bwlq, type)					\
 	__BUILD_IOPORT_PFX(, bwlq, type)
-- 
2.25.1


  reply	other threads:[~2022-10-14  0:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-10-14  0:19 [PATCH 0/3] Remove unused SLOW_DOWN_IO Bjorn Helgaas
2022-10-14  0:19 ` Bjorn Helgaas [this message]
2022-10-18  4:39   ` [PATCH 1/3] sh: remove " kernel test robot
2022-10-18 17:30   ` Bjorn Helgaas
2022-10-14  0:19 ` [PATCH 2/3] ia64: remove unused __SLOW_DOWN_IO and SLOW_DOWN_IO definitions Bjorn Helgaas
2022-10-14  0:19 ` [PATCH 3/3] alpha: " Bjorn Helgaas

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