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Date: Thu, 07 Nov 2019 07:29:08 -0800 (PST)
From: Palmer Dabbelt <palmer@...belt.com>
To: Christoph Hellwig <hch@....de>
CC: Arnd Bergmann <arnd@...db.de>, guoren@...nel.org, monstr@...str.eu,
green.hu@...il.com, deanbo422@...il.com, gxt@....edu.cn,
x86@...nel.org, linux-alpha@...r.kernel.org,
linux-snps-arc@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org,
linux-hexagon@...r.kernel.org, linux-ia64@...r.kernel.org,
linux-m68k@...ts.linux-m68k.org, linux-mips@...r.kernel.org,
nios2-dev@...ts.rocketboards.org, openrisc@...ts.librecores.org,
linux-parisc@...r.kernel.org, linux-riscv@...ts.infradead.org,
linux-s390@...r.kernel.org, linux-sh@...r.kernel.org,
sparclinux@...r.kernel.org, linux-xtensa@...ux-xtensa.org,
linux-mtd@...ts.infradead.org, linux-arch@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 12/21] arch: rely on asm-generic/io.h for default ioremap_* definitions
On Mon, 28 Oct 2019 23:48:25 PDT (-0700), Christoph Hellwig wrote:
> Various architectures that use asm-generic/io.h still defined their
> own default versions of ioremap_nocache, ioremap_wt and ioremap_wc
> that point back to plain ioremap directly or indirectly. Remove these
> definitions and rely on asm-generic/io.h instead. For this to work
> the backup ioremap_* defintions needs to be changed to purely cpp
> macros instea of inlines to cover for architectures like openrisc
> that only define ioremap after including <asm-generic/io.h>.
>
> Signed-off-by: Christoph Hellwig <hch@....de>
> ---
> arch/arc/include/asm/io.h | 4 ----
> arch/arm/include/asm/io.h | 1 -
> arch/arm64/include/asm/io.h | 2 --
> arch/csky/include/asm/io.h | 1 -
> arch/ia64/include/asm/io.h | 1 -
> arch/microblaze/include/asm/io.h | 3 ---
> arch/nios2/include/asm/io.h | 4 ----
> arch/openrisc/include/asm/io.h | 1 -
> arch/riscv/include/asm/io.h | 10 ----------
> arch/s390/include/asm/io.h | 4 ----
> arch/x86/include/asm/io.h | 1 -
> arch/xtensa/include/asm/io.h | 4 ----
> include/asm-generic/io.h | 18 +++---------------
> 13 files changed, 3 insertions(+), 51 deletions(-)
>
> diff --git a/arch/arc/include/asm/io.h b/arch/arc/include/asm/io.h
> index 72f7929736f8..8f777d6441a5 100644
> --- a/arch/arc/include/asm/io.h
> +++ b/arch/arc/include/asm/io.h
> @@ -34,10 +34,6 @@ static inline void ioport_unmap(void __iomem *addr)
>
> extern void iounmap(const void __iomem *addr);
>
> -#define ioremap_nocache(phy, sz) ioremap(phy, sz)
> -#define ioremap_wc(phy, sz) ioremap(phy, sz)
> -#define ioremap_wt(phy, sz) ioremap(phy, sz)
> -
> /*
> * io{read,write}{16,32}be() macros
> */
> diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
> index 924f9dd502ed..aefdabdbeb84 100644
> --- a/arch/arm/include/asm/io.h
> +++ b/arch/arm/include/asm/io.h
> @@ -392,7 +392,6 @@ static inline void memcpy_toio(volatile void __iomem *to, const void *from,
> */
> void __iomem *ioremap(resource_size_t res_cookie, size_t size);
> #define ioremap ioremap
> -#define ioremap_nocache ioremap
>
> /*
> * Do not use ioremap_cache for mapping memory. Use memremap instead.
> diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
> index 323cb306bd28..4e531f57147d 100644
> --- a/arch/arm64/include/asm/io.h
> +++ b/arch/arm64/include/asm/io.h
> @@ -167,9 +167,7 @@ extern void iounmap(volatile void __iomem *addr);
> extern void __iomem *ioremap_cache(phys_addr_t phys_addr, size_t size);
>
> #define ioremap(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
> -#define ioremap_nocache(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
> #define ioremap_wc(addr, size) __ioremap((addr), (size), __pgprot(PROT_NORMAL_NC))
> -#define ioremap_wt(addr, size) __ioremap((addr), (size), __pgprot(PROT_DEVICE_nGnRE))
>
> /*
> * PCI configuration space mapping function.
> diff --git a/arch/csky/include/asm/io.h b/arch/csky/include/asm/io.h
> index 80d071e2567f..a4b9fb616faa 100644
> --- a/arch/csky/include/asm/io.h
> +++ b/arch/csky/include/asm/io.h
> @@ -42,7 +42,6 @@ extern void iounmap(void *addr);
>
> #define ioremap(addr, size) __ioremap((addr), (size), pgprot_noncached(PAGE_KERNEL))
> #define ioremap_wc(addr, size) __ioremap((addr), (size), pgprot_writecombine(PAGE_KERNEL))
> -#define ioremap_nocache(addr, size) ioremap((addr), (size))
> #define ioremap_cache ioremap_cache
>
> #include <asm-generic/io.h>
> diff --git a/arch/ia64/include/asm/io.h b/arch/ia64/include/asm/io.h
> index fec9df9609ed..3d666a11a2de 100644
> --- a/arch/ia64/include/asm/io.h
> +++ b/arch/ia64/include/asm/io.h
> @@ -263,7 +263,6 @@ static inline void __iomem * ioremap_cache (unsigned long phys_addr, unsigned lo
> return ioremap(phys_addr, size);
> }
> #define ioremap ioremap
> -#define ioremap_nocache ioremap
> #define ioremap_cache ioremap_cache
> #define ioremap_uc ioremap_uc
> #define iounmap iounmap
> diff --git a/arch/microblaze/include/asm/io.h b/arch/microblaze/include/asm/io.h
> index 86c95b2a1ce1..d33c61737b8b 100644
> --- a/arch/microblaze/include/asm/io.h
> +++ b/arch/microblaze/include/asm/io.h
> @@ -39,9 +39,6 @@ extern resource_size_t isa_mem_base;
> extern void iounmap(volatile void __iomem *addr);
>
> extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
> -#define ioremap_nocache(addr, size) ioremap((addr), (size))
> -#define ioremap_wc(addr, size) ioremap((addr), (size))
> -#define ioremap_wt(addr, size) ioremap((addr), (size))
>
> #endif /* CONFIG_MMU */
>
> diff --git a/arch/nios2/include/asm/io.h b/arch/nios2/include/asm/io.h
> index 74ab34aa6731..d108937c321e 100644
> --- a/arch/nios2/include/asm/io.h
> +++ b/arch/nios2/include/asm/io.h
> @@ -33,10 +33,6 @@ static inline void iounmap(void __iomem *addr)
> __iounmap(addr);
> }
>
> -#define ioremap_nocache ioremap
> -#define ioremap_wc ioremap
> -#define ioremap_wt ioremap
> -
> /* Pages to physical address... */
> #define page_to_phys(page) virt_to_phys(page_to_virt(page))
>
> diff --git a/arch/openrisc/include/asm/io.h b/arch/openrisc/include/asm/io.h
> index 5b81a96ab85e..e18f038b2a6d 100644
> --- a/arch/openrisc/include/asm/io.h
> +++ b/arch/openrisc/include/asm/io.h
> @@ -25,7 +25,6 @@
> #define PIO_OFFSET 0
> #define PIO_MASK 0
>
> -#define ioremap_nocache ioremap
> #include <asm-generic/io.h>
> #include <asm/pgtable.h>
>
> diff --git a/arch/riscv/include/asm/io.h b/arch/riscv/include/asm/io.h
> index fc1189ad3777..c1de6875cc77 100644
> --- a/arch/riscv/include/asm/io.h
> +++ b/arch/riscv/include/asm/io.h
> @@ -15,16 +15,6 @@
> #include <asm/mmiowb.h>
>
> extern void __iomem *ioremap(phys_addr_t offset, unsigned long size);
> -
> -/*
> - * The RISC-V ISA doesn't yet specify how to query or modify PMAs, so we can't
> - * change the properties of memory regions. This should be fixed by the
> - * upcoming platform spec.
> - */
> -#define ioremap_nocache(addr, size) ioremap((addr), (size))
> -#define ioremap_wc(addr, size) ioremap((addr), (size))
> -#define ioremap_wt(addr, size) ioremap((addr), (size))
> -
> extern void iounmap(volatile void __iomem *addr);
>
> /* Generic IO read/write. These perform native-endian accesses. */
> diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
> index ca421614722f..5a16f500515a 100644
> --- a/arch/s390/include/asm/io.h
> +++ b/arch/s390/include/asm/io.h
> @@ -26,10 +26,6 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
>
> #define IO_SPACE_LIMIT 0
>
> -#define ioremap_nocache(addr, size) ioremap(addr, size)
> -#define ioremap_wc ioremap_nocache
> -#define ioremap_wt ioremap_nocache
> -
> void __iomem *ioremap(unsigned long offset, unsigned long size);
> void iounmap(volatile void __iomem *addr);
>
> diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
> index 6b5cc41319a7..9997521fc5cd 100644
> --- a/arch/x86/include/asm/io.h
> +++ b/arch/x86/include/asm/io.h
> @@ -205,7 +205,6 @@ extern void __iomem *ioremap_encrypted(resource_size_t phys_addr, unsigned long
> */
> void __iomem *ioremap(resource_size_t offset, unsigned long size);
> #define ioremap ioremap
> -#define ioremap_nocache ioremap
>
> extern void iounmap(volatile void __iomem *addr);
> #define iounmap iounmap
> diff --git a/arch/xtensa/include/asm/io.h b/arch/xtensa/include/asm/io.h
> index 441fb56926a7..54188e69b988 100644
> --- a/arch/xtensa/include/asm/io.h
> +++ b/arch/xtensa/include/asm/io.h
> @@ -52,10 +52,6 @@ static inline void __iomem *ioremap_cache(unsigned long offset,
> }
> #define ioremap_cache ioremap_cache
>
> -#define ioremap_nocache ioremap
> -#define ioremap_wc ioremap
> -#define ioremap_wt ioremap
> -
> static inline void iounmap(volatile void __iomem *addr)
> {
> unsigned long va = (unsigned long) addr;
> diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
> index 6a5edc23afe2..4e45e1cb6560 100644
> --- a/include/asm-generic/io.h
> +++ b/include/asm-generic/io.h
> @@ -949,27 +949,15 @@ static inline void iounmap(void __iomem *addr)
> #endif /* CONFIG_MMU */
>
> #ifndef ioremap_nocache
> -#define ioremap_nocache ioremap_nocache
> -static inline void __iomem *ioremap_nocache(phys_addr_t offset, size_t size)
> -{
> - return ioremap(offset, size);
> -}
> +#define ioremap_nocache ioremap
> #endif
>
> #ifndef ioremap_wc
> -#define ioremap_wc ioremap_wc
> -static inline void __iomem *ioremap_wc(phys_addr_t offset, size_t size)
> -{
> - return ioremap_nocache(offset, size);
> -}
> +#define ioremap_wc ioremap
> #endif
>
> #ifndef ioremap_wt
> -#define ioremap_wt ioremap_wt
> -static inline void __iomem *ioremap_wt(phys_addr_t offset, size_t size)
> -{
> - return ioremap_nocache(offset, size);
> -}
> +#define ioremap_wt ioremap
> #endif
>
> /*
Reviewed-by: Palmer Dabbelt <palmer@...belt.com>
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