linux-kernel - [PATCH 3/3] ia64: rename ioremap_nocache to ioremap

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Message-Id: <20190830161237.23033-4-hch@lst.de>
Date:   Fri, 30 Aug 2019 18:12:37 +0200
From:   Christoph Hellwig <hch@....de>
To:     Michal Simek <monstr@...str.eu>, Tony Luck <tony.luck@...el.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-m68k@...ts.linux-m68k.org, linux-ia64@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] ia64: rename ioremap_nocache to ioremap_uc

On ia64 ioremap_nocache fails if attributes don't match.  Not other
architectures does this, and we plan to get rid of ioremap_nocache.
So get rid of the special semantics and define ioremap_nocache in
terms of ioremap as no portable driver could rely on the behavior
anyway.

However x86 implements ioremap_uc in a similar way as the ia64
version of ioremap_nocache, so implement that instead.

Signed-off-by: Christoph Hellwig <hch@....de>
---
 arch/ia64/include/asm/io.h | 6 +++---
 arch/ia64/mm/ioremap.c     | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
index a511d62d447a..febd2c6ea0b4 100644
--- a/arch/ia64/include/asm/io.h
+++ b/arch/ia64/include/asm/io.h
@@ -412,16 +412,16 @@ __writeq (unsigned long val, volatile void __iomem *addr)
 # ifdef __KERNEL__
 
 extern void __iomem * ioremap(unsigned long offset, unsigned long size);
-extern void __iomem * ioremap_nocache (unsigned long offset, unsigned long size);
+extern void __iomem * ioremap_uc(unsigned long offset, unsigned long size);
 extern void iounmap (volatile void __iomem *addr);
 static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned long size)
 {
 	return ioremap(phys_addr, size);
 }
 #define ioremap ioremap
-#define ioremap_nocache ioremap_nocache
+#define ioremap_nocache ioremap
 #define ioremap_cache ioremap_cache
-#define ioremap_uc ioremap_nocache
+#define ioremap_uc ioremap_uc
 #define iounmap iounmap
 
 /*
diff --git a/arch/ia64/mm/ioremap.c b/arch/ia64/mm/ioremap.c
index 0c0de2c4ec69..a09cfa064536 100644
--- a/arch/ia64/mm/ioremap.c
+++ b/arch/ia64/mm/ioremap.c
@@ -99,14 +99,14 @@ ioremap (unsigned long phys_addr, unsigned long size)
 EXPORT_SYMBOL(ioremap);
 
 void __iomem *
-ioremap_nocache (unsigned long phys_addr, unsigned long size)
+ioremap_uc(unsigned long phys_addr, unsigned long size)
 {
 	if (kern_mem_attribute(phys_addr, size) & EFI_MEMORY_WB)
 		return NULL;
 
 	return __ioremap_uc(phys_addr);
 }
-EXPORT_SYMBOL(ioremap_nocache);
+EXPORT_SYMBOL(ioremap_uc);
 
 void
 early_iounmap (volatile void __iomem *addr, unsigned long size)
-- 
2.20.1