linux-kernel - Re: [PATCH 1/2] parisc: use the asm-generic version for writeX()

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Date:   Mon, 16 Apr 2018 19:15:37 -0400
From:   Sinan Kaya <okaya@...eaurora.org>
To:     John David Anglin <dave.anglin@...l.net>, arnd@...db.de,
        timur@...eaurora.org, sulrich@...eaurora.org
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        "James E.J. Bottomley" <jejb@...isc-linux.org>,
        Helge Deller <deller@....de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Philippe Ombredanne <pombredanne@...b.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-parisc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] parisc: use the asm-generic version for writeX()

On 4/16/2018 7:09 PM, John David Anglin wrote:
> On 2018-04-16 6:01 PM, Sinan Kaya wrote:
>> parisc architecture seems to be mapping writeX() and writeX_relaxed() APIs
>> to __raw_writeX() API.
>>
>> __raw_writeX() API doesn't provide any kind of ordering guarantees.
>> commit 755bd04aaf4b ("io: define stronger ordering for the default writeX()
>> implementation") changed asm-generic implementation to use a more
>> conservative approach towards the writeX() API.
>>
>> Drop the arch specific version and rely on the asm-generic version for
>> parisc since parisc version doesn't seem to do anything special with these
>> macros.
>   HOSTLD  scripts/mod/modpost
> In file included from ./arch/parisc/include/asm/hardirq.h:13:0,
>                  from ./include/linux/hardirq.h:9,
>                  from arch/parisc/kernel/asm-offsets.c:34:
> ./include/linux/irq.h: In function 'irq_reg_writel':
> ./include/linux/irq.h:1114:3: error: implicit declaration of function 'writel' [-Werror=implicit-function-declaration]
>    writel(val, gc->reg_base + reg_offset);
>    ^~~~~~
> ./include/linux/irq.h: In function 'irq_reg_readl':
> ./include/linux/irq.h:1123:10: error: implicit declaration of function 'readl' [-Werror=implicit-function-declaration]
>    return readl(gc->reg_base + reg_offset);
>           ^~~~~
> cc1: some warnings being treated as errors
> make[1]: *** [Kbuild:58: arch/parisc/kernel/asm-offsets.s] Error 1
> 
> Dave
> 

Thanks for testing. Can you add this on top and see if it helps?

--- a/arch/parisc/include/asm/io.h
+++ b/arch/parisc/include/asm/io.h
@@ -259,6 +259,7 @@ extern void outsl (unsigned long port, const void *src, unsigned long count);
  * value for either 32 or 64 bit mode */
 #define F_EXTEND(x) ((unsigned long)((x) | (0xffffffff00000000ULL)))
 
+#include <asm-generic/io.h>
 #include <asm-generic/iomap.h>


-- 
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.