linux-kernel - Re: READ_ONCE() + STACKPROTECTOR

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Date:   Fri, 13 Dec 2019 00:00:52 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     peterz@...radead.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: READ_ONCE() + STACKPROTECTOR_STRONG == :/ 

> We could move the kernel to C++ and write:
> 
> 	std::remove_volatile<typeof(p)>::type __p = (p);
> 
> /me runs like hell...

Did you just said I can send "struct sched_domain::private" and
"struct wait_queue_entry::private" rename?
:^)

Doable but not until C++20. constinit and designated initializers are
pretty mandatory.

Debian GNU/Linux 8 debian88 ttyS0

debian88 login: root
Password:
Last login: Thu Sep 19 01:04:29 +03 2019 on tty1
Linux debian88 5.3.0+ #1 SMP PREEMPT Thu Sep 19 01:02:26 +03 2019 x86_64
root@...ian88:~# cat /proc/$(pgrep sshd)/stack
[<0>] _ZL9do_selectiP11fd_set_bitsP10timespec64+0x5ac/0x750
[<0>] _Z15core_sys_selectiP15__kernel_fd_setS0_S0_P10timespec64+0x143/0x260
[<0>] __x64_sys_select+0xa7/0xf0
[<0>] do_syscall_64+0x3b/0xe7
[<0>] entry_SYSCALL_64_after_hwframe+0x44/0xa9