linux-kernel - Re: [PATCHv2 01/14] treewide: Move set_memory

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Date:   Thu, 2 Mar 2017 12:07:09 +0000
From:   Russell King - ARM Linux <linux@...linux.org.uk>
To:     Laura Abbott <labbott@...hat.com>
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Martin Schwidefsky <schwidefsky@...ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Kees Cook <keescook@...omium.org>,
        Mark Rutland <mark.rutland@....com>,
        Arnd Bergmann <arnd@...db.de>, David Airlie <airlied@...ux.ie>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Wim Van Sebroeck <wim@...ana.be>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-watchdog@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Daniel Borkmann <daniel@...earbox.net>,
        Jessica Yu <jeyu@...hat.com>, Takashi Iwai <tiwai@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-arch@...r.kernel.org, linux-s390@...r.kernel.org,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCHv2 01/14] treewide: Move set_memory_* functions away from
 cacheflush.h

On Wed, Mar 01, 2017 at 04:14:53PM -0800, Laura Abbott wrote:
> diff --git a/arch/arm/include/asm/cacheflush.h b/arch/arm/include/asm/cacheflush.h
> index 02454fa..1cb9d11 100644
> --- a/arch/arm/include/asm/cacheflush.h
> +++ b/arch/arm/include/asm/cacheflush.h
> @@ -16,6 +16,7 @@
>  #include <asm/shmparam.h>
>  #include <asm/cachetype.h>
>  #include <asm/outercache.h>
> +#include <asm/set_memory.h>
>  
>  #define CACHE_COLOUR(vaddr)	((vaddr & (SHMLBA - 1)) >> PAGE_SHIFT)
>  
> @@ -478,26 +479,6 @@ static inline void __sync_cache_range_r(volatile void *p, size_t size)
>  	: : : "r0","r1","r2","r3","r4","r5","r6","r7", \
>  	      "r9","r10","lr","memory" )
>  
> -#ifdef CONFIG_MMU
> -int set_memory_ro(unsigned long addr, int numpages);
> -int set_memory_rw(unsigned long addr, int numpages);
> -int set_memory_x(unsigned long addr, int numpages);
> -int set_memory_nx(unsigned long addr, int numpages);
> -#else
> -static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
> -static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
> -static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
> -static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
> -#endif
> -
> -#ifdef CONFIG_STRICT_KERNEL_RWX
> -void set_kernel_text_rw(void);
> -void set_kernel_text_ro(void);
> -#else
> -static inline void set_kernel_text_rw(void) { }
> -static inline void set_kernel_text_ro(void) { }
> -#endif
> -
>  void flush_uprobe_xol_access(struct page *page, unsigned long uaddr,
>  			     void *kaddr, unsigned long len);
>  
> diff --git a/arch/arm/include/asm/set_memory.h b/arch/arm/include/asm/set_memory.h
> new file mode 100644
> index 0000000..5aa4315
> --- /dev/null
> +++ b/arch/arm/include/asm/set_memory.h
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright (C) 1999-2002 Russell King
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef _ASMARM_SET_MEMORY_H
> +#define _ASMARM_SET_MEMORY_H
> +
> +#ifdef CONFIG_MMU
> +int set_memory_ro(unsigned long addr, int numpages);
> +int set_memory_rw(unsigned long addr, int numpages);
> +int set_memory_x(unsigned long addr, int numpages);
> +int set_memory_nx(unsigned long addr, int numpages);
> +#else
> +static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
> +static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
> +static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
> +static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
> +#endif
> +
> +#ifdef CONFIG_STRICT_KERNEL_RWX
> +void set_kernel_text_rw(void);
> +void set_kernel_text_ro(void);
> +#else
> +static inline void set_kernel_text_rw(void) { }
> +static inline void set_kernel_text_ro(void) { }
> +#endif
> +
> +#endif

Acked-by: Russell King <rmk+kernel@...linux.org.uk>

Thanks.

-- 
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
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