From: Michael Ellerman <mpe@ellerman.id.au>
To: "Christopher M. Riedl" <cmr@codefail.de>,
Daniel Axtens <dja@axtens.net>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v5 05/10] powerpc/signal64: Remove TM ifdefery in middle of if/else block
Date: Thu, 18 Feb 2021 21:47:08 +1100 [thread overview]
Message-ID: <871rddvej7.fsf@mpe.ellerman.id.au> (raw)
In-Reply-To: <C9C1XKNVRQC4.LHKIIQAIC3L7@oc8246131445.ibm.com>
"Christopher M. Riedl" <cmr@codefail.de> writes:
> On Thu Feb 11, 2021 at 11:21 PM CST, Daniel Axtens wrote:
...
>>
>> My only concern here was whether it was valid to access
>> if (__get_user(msr, &uc->uc_mcontext.gp_regs[PT_MSR]))
>> if CONFIG_PPC_TRANSACTIONAL_MEM was not defined, but I didn't think of
>> any obvious reason why it wouldn't be...
>
> Hmm, we don't really need it for the non-TM case and it is another extra
> uaccess. I will take your suggestion to remove the need for the other
> ifdefs but might keep this one. Keeping it also makes it very clear this
> call is only here for TM and possible to remove in a potentially TM-less
> future :)
Yep I agree.
cheers
next prev parent reply other threads:[~2021-02-18 10:47 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 18:43 [PATCH v5 00/10] Improve signal performance on PPC64 with KUAP Christopher M. Riedl
2021-02-03 18:43 ` [PATCH v5 01/10] powerpc/uaccess: Add unsafe_copy_from_user Christopher M. Riedl
2021-02-05 4:47 ` Daniel Axtens
2021-02-03 18:43 ` [PATCH v5 02/10] powerpc/signal: Add unsafe_copy_{vsx, fpr}_from_user() Christopher M. Riedl
2021-02-05 5:17 ` Daniel Axtens
2021-02-03 18:43 ` [PATCH v5 03/10] powerpc/signal64: Move non-inline functions out of setup_sigcontext() Christopher M. Riedl
2021-02-08 4:44 ` Daniel Axtens
2021-02-10 4:37 ` Christopher M. Riedl
2021-02-10 21:06 ` Daniel Axtens
2021-02-10 23:51 ` Christopher M. Riedl
2021-02-03 18:43 ` [PATCH v5 04/10] powerpc: Reference param in MSR_TM_ACTIVE() macro Christopher M. Riedl
2021-02-12 4:52 ` Daniel Axtens
2021-02-03 18:43 ` [PATCH v5 05/10] powerpc/signal64: Remove TM ifdefery in middle of if/else block Christopher M. Riedl
2021-02-12 5:21 ` Daniel Axtens
2021-02-17 19:27 ` Christopher M. Riedl
2021-02-18 10:47 ` Michael Ellerman [this message]
2021-02-03 18:43 ` [PATCH v5 06/10] powerpc/signal64: Replace setup_sigcontext() w/ unsafe_setup_sigcontext() Christopher M. Riedl
2021-02-12 5:41 ` Daniel Axtens
2021-02-17 19:31 ` Christopher M. Riedl
2021-02-03 18:43 ` [PATCH v5 07/10] powerpc/signal64: Replace restore_sigcontext() w/ unsafe_restore_sigcontext() Christopher M. Riedl
2021-02-12 21:17 ` Daniel Axtens
2021-02-17 19:32 ` Christopher M. Riedl
2021-02-03 18:43 ` [PATCH v5 08/10] powerpc/signal64: Rewrite handle_rt_signal64() to minimise uaccess switches Christopher M. Riedl
2021-02-03 18:43 ` [PATCH v5 09/10] powerpc/signal64: Rewrite rt_sigreturn() " Christopher M. Riedl
2021-02-03 18:43 ` [PATCH v5 10/10] powerpc/signal64: Use __get_user() to copy sigset_t Christopher M. Riedl
2021-02-05 4:40 ` Christopher M. Riedl
2021-02-09 21:45 ` Christophe Leroy
2021-02-10 4:16 ` Christopher M. Riedl
2021-02-12 21:21 ` Daniel Axtens
2021-02-17 19:53 ` Christopher M. Riedl
2021-02-15 22:02 ` kernel test robot
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