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From: Andy Lutomirski <luto@amacapital.net>
To: Brian Gerst <brgerst@gmail.com>
Cc: Andy Lutomirski <luto@kernel.org>,
	"the arch/x86 maintainers" <x86@kernel.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
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	<kernel-hardening@lists.openwall.com>,
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	sparclinux@vger.kernel.org
Subject: Re: [PATCH v5 18/32] signal: Consolidate {TS,TLF}_RESTORE_SIGMASK code
Date: Tue, 12 Jul 2016 16:01:23 -0700	[thread overview]
Message-ID: <CALCETrXN3Jd=8TOsHejVNQj8ef4KH-GYzW8rD6ounq=ZX9TT5A@mail.gmail.com> (raw)
In-Reply-To: <CAMzpN2j2F9gQCRGmzVb0LjQT9mmU9m=HRG2Vbf-g79+i57dvdg@mail.gmail.com>

On Tue, Jul 12, 2016 at 4:57 AM, Brian Gerst <brgerst@gmail.com> wrote:
> On Mon, Jul 11, 2016 at 4:53 PM, Andy Lutomirski <luto@kernel.org> wrote:
>> In general, there's no need for the "restore sigmask" flag to live in
>> ti->flags.  alpha, ia64, microblaze, powerpc, sh, sparc (64-bit only),
>> tile, and x86 use essentially identical alternative implementations,
>> placing the flag in ti->status.
>>
>> Replace those optimized implementations with an equally good common
>> implementation that stores it in a bitfield in struct task_struct
>> and drop the custom implementations.
>>
>> Additional architectures can opt in by removing their
>> TIF_RESTORE_SIGMASK defines.
>
> There is a small typo in the subject, should be "signal: Consolidate
> {TS,TIF}_RESTORE_SIGMASK code"

I really did mean "TLF" -- it's a powerpc-ism.  This patch doesn't
affect TIF_RESTORE_SIGMASK on architectures that have that flag,
although it makes it much easier for them to get rid of it.

--Andy

  reply	other threads:[~2016-07-12 23:01 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-11 20:53 [PATCH v5 00/32] virtually mapped stacks and thread_info cleanup Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 01/32] bluetooth: Switch SMP to crypto_cipher_encrypt_one() Andy Lutomirski
2016-07-14 19:10   ` Andy Lutomirski
2016-07-14 20:30     ` Marcel Holtmann
2016-07-14 20:41     ` David Miller
2016-07-11 20:53 ` [PATCH v5 02/32] x86/mm/hotplug: Don't remove PGD entries in remove_pagetable() Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 03/32] x86/cpa: In populate_pgd, don't set the pgd entry until it's populated Andy Lutomirski
2016-07-22  4:43   ` [kernel-hardening] " Valdis.Kletnieks
2016-07-22  5:34     ` Andy Lutomirski
2016-07-22 10:21       ` Ingo Molnar
2016-07-22 18:21         ` Andy Lutomirski
2016-07-22 18:31           ` Andy Lutomirski
2016-07-22 20:11           ` Ingo Molnar
2016-07-23  5:21       ` Valdis.Kletnieks
2016-07-23 14:58         ` Nicolai Stange
2016-07-28  9:26           ` Valdis.Kletnieks
2016-07-11 20:53 ` [PATCH v5 04/32] x86/mm: Remove kernel_unmap_pages_in_pgd() and efi_cleanup_page_tables() Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 05/32] mm: Track NR_KERNEL_STACK in KiB instead of number of stacks Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 06/32] mm: Fix memcg stack accounting for sub-page stacks Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 07/32] fork: Add generic vmalloced stack support Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 08/32] dma-api: Teach the "DMA-from-stack" check about vmapped stacks Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 09/32] x86/dumpstack: When OOPSing, rewind the stack before do_exit() Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 10/32] x86/dumpstack: Honor supplied @regs arg Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 11/32] x86/dumpstack: Try harder to get a call trace on stack overflow Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 12/32] x86/dumpstack/64: Handle faults when printing the "Stack:" part of an OOPS Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 13/32] x86/mm/64: In vmalloc_fault(), use CR3 instead of current->active_mm Andy Lutomirski
2016-07-12 17:51   ` [kernel-hardening] " Dave Hansen
2016-07-12 18:03     ` Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 14/32] x86/mm/64: Enable vmapped stacks Andy Lutomirski
2016-07-13  7:53   ` Ingo Molnar
2016-07-13 18:42     ` Andy Lutomirski
2016-07-14  8:34       ` Ingo Molnar
2016-07-14 16:51         ` Andy Lutomirski
2016-07-14 18:45           ` Ingo Molnar
2016-07-11 20:53 ` [PATCH v5 15/32] x86/mm: Improve stack-overflow #PF handling Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 16/32] x86: Move uaccess_err and sig_on_uaccess_err to thread_struct Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 17/32] x86: Move addr_limit " Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 18/32] signal: Consolidate {TS,TLF}_RESTORE_SIGMASK code Andy Lutomirski
2016-07-12 11:57   ` Brian Gerst
2016-07-12 23:01     ` Andy Lutomirski [this message]
2016-07-11 20:53 ` [PATCH v5 19/32] x86/smp: Remove stack_smp_processor_id() Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 20/32] x86/smp: Remove unnecessary initialization of thread_info::cpu Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 21/32] x86/asm: Move 'status' from struct thread_info to struct thread_struct Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 22/32] kdb: Use task_cpu() instead of task_thread_info()->cpu Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 23/32] printk: When dumping regs, show the stack, not thread_info Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 24/32] x86/entry: Get rid of pt_regs_to_thread_info() Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 25/32] um: Stop conflating task_struct::stack with thread_info Andy Lutomirski
2016-07-11 20:53 ` [PATCH v5 26/32] sched: Allow putting thread_info into task_struct Andy Lutomirski
2016-07-11 20:54 ` [PATCH v5 27/32] x86: Move " Andy Lutomirski
2016-07-11 20:54 ` [PATCH v5 28/32] sched: Add try_get_task_stack() and put_task_stack() Andy Lutomirski
2016-07-11 20:54 ` [PATCH v5 29/32] kthread: to_live_kthread() needs try_get_task_stack() Andy Lutomirski
2016-07-11 20:54 ` [PATCH v5 30/32] x86/dumpstack: Pin the target stack in save_stack_trace_tsk() Andy Lutomirski
2016-07-11 20:54 ` [PATCH v5 31/32] sched: Free the stack early if CONFIG_THREAD_INFO_IN_TASK Andy Lutomirski
2016-07-11 20:54 ` [PATCH v5 32/32] fork: Cache two thread stacks per cpu if CONFIG_VMAP_STACK is set Andy Lutomirski
2016-07-12  8:56 ` [PATCH v5 00/32] virtually mapped stacks and thread_info cleanup Herbert Xu
2016-07-13  8:54 ` Christian Borntraeger
2016-07-13 18:36   ` Andy Lutomirski
2016-07-13 18:53     ` Christian Borntraeger

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