[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1585913065.zoacp2kzsv.astroid@bobo.none>
Date: Fri, 03 Apr 2020 21:26:27 +1000
From: Nicholas Piggin <npiggin@...il.com>
To: Michal Suchánek <msuchanek@...e.de>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Allison Randal <allison@...utok.net>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Arnd Bergmann <arnd@...db.de>,
Thiago Jung Bauermann <bauerman@...ux.ibm.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
Claudio Carvalho <cclaudio@...ux.ibm.com>,
Christophe Leroy <christophe.leroy@....fr>,
"David S. Miller" <davem@...emloft.net>,
"Eric W. Biederman" <ebiederm@...ssion.com>,
Eric Richter <erichte@...ux.ibm.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Gustavo Luiz Duarte <gustavold@...ux.ibm.com>,
Hari Bathini <hbathini@...ux.ibm.com>,
Jordan Niethe <jniethe5@...il.com>,
Jiri Olsa <jolsa@...hat.com>,
Jonathan Cameron <Jonathan.Cameron@...wei.com>,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org, Mark Rutland <mark.rutland@....com>,
Masahiro Yamada <masahiroy@...nel.org>,
Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
Michael Neuling <mikey@...ling.org>,
Ingo Molnar <mingo@...hat.com>,
Michael Ellerman <mpe@...erman.id.au>,
Namhyung Kim <namhyung@...nel.org>,
Nayna Jain <nayna@...ux.ibm.com>,
Paul Mackerras <paulus@...ba.org>,
Peter Zijlstra <peterz@...radead.org>,
Rob Herring <robh@...nel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Valentin Schneider <valentin.schneider@....com>,
Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH v11 3/8] powerpc/perf: consolidate read_user_stack_32
Michal Suchánek's on April 3, 2020 8:52 pm:
> Hello,
>
> there are 3 variants of the function
>
> read_user_stack_64
>
> 32bit read_user_stack_32
> 64bit read_user_Stack_32
Right.
> On Fri, Apr 03, 2020 at 05:13:25PM +1000, Nicholas Piggin wrote:
[...]
>> #endif /* CONFIG_PPC64 */
>>
>> +static int read_user_stack_32(unsigned int __user *ptr, unsigned int *ret)
>> +{
>> + return __read_user_stack(ptr, ret, sizeof(*ret));
> Does not work for 64bit read_user_stack_32 ^ this should be 4.
>
> Other than that it should preserve the existing logic just fine.
sizeof(int) == 4 on 64bit so it should work.
Thanks,
Nick
Powered by blists - more mailing lists