linux-kernel - Re: [PATCH] signal/parics: Remove parsic specific definition of __ARCH_UAPI_SA

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Date:   Mon, 30 Nov 2020 13:46:31 -0600
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Peter Collingbourne <pcc@...gle.com>,
        Helge Deller <deller@....de>, linux-parisc@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>
Subject: Re: [PATCH] signal/parics: Remove parsic specific definition of __ARCH_UAPI_SA_FLAGS

Randy Dunlap <rdunlap@...radead.org> writes:

> On 11/30/20 9:30 AM, Eric W. Biederman wrote:
>> 
>> Randy Dunlap wrote:
>>> On 11/27/20 10:43 AM, Randy Dunlap wrote:
>>>
>>>> on parisc, _SA_SIGGFAULT is undefined and causing build errors.
>>>>
>>>> commit 23acdc76f1798b090bb9dcc90671cd29d929834e
>>>> Author: Peter Collingbourne <pcc@...gle.com>
>>>> Date:   Thu Nov 12 18:53:34 2020 -0800
>>>>
>>>>     signal: clear non-uapi flag bits when passing/returning sa_flags
>>>>
>>>>
>>>>
>>>> _SA_SIGGFAULT is not used or defined anywhere else in the
>>>> kernel source tree.
>>>
>>>
>>> Here is the build error (although it should be obvious):
>>>
>>> ../kernel/signal.c: In function 'do_sigaction':
>>> ../arch/parisc/include/asm/signal.h:24:30: error: '_SA_SIGGFAULT' undeclared (first use in this function)
>>>    24 | #define __ARCH_UAPI_SA_FLAGS _SA_SIGGFAULT
>>>       |                              ^~~~~~~~~~~~~
>> 
>> Stephen Rothwell pointed out:
>>> _SA_SIGGFAULT was removed by commit
>>>
>>>   41f5a81c07cd ("parisc: Drop HP-UX specific fcntl and signal flags")
>>>
>>> which was added to Linus' tree in v5.10-rc1.
>> 
>> Solve this by removing the the parisc specific definition of
>> __ARCH_UAPI_SA_FLAGS that was just added.
>> 
>> Reported-by: Randy Dunlap <rdunlap@...radead.org>
>> Fixes: 23acdc76f179 ("signal: clear non-uapi flag bits when passing/returning sa_flags")
>> Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
>
> Thanks, Eric.
>
> Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested
>
>
> BTW, there are 2 typos for "parisc" in the Subject: line...

Oops.  Fixed now.  Thank you for testing.

Eric

>
>
>> ---
>>  arch/parisc/include/asm/signal.h | 2 --
>>  1 file changed, 2 deletions(-)
>> 
>> I am applying this trivial fix to my signal-for-v5.11 branch.  Catalin
>> you shouldn't need to do anything unless someone tests your tree on
>> parisc.
>> 
>> diff --git a/arch/parisc/include/asm/signal.h b/arch/parisc/include/asm/signal.h
>> index 30dd1e43ef88..715c96ba2ec8 100644
>> --- a/arch/parisc/include/asm/signal.h
>> +++ b/arch/parisc/include/asm/signal.h
>> @@ -21,8 +21,6 @@ typedef struct {
>>  	unsigned long sig[_NSIG_WORDS];
>>  } sigset_t;
>>  
>> -#define __ARCH_UAPI_SA_FLAGS	_SA_SIGGFAULT
>> -
>>  #include <asm/sigcontext.h>
>>  
>>  #endif /* !__ASSEMBLY */
>>