Thread (152 messages) flat view 152 messages, 13 authors, 2016-04-14

[v3,11/41] mips: reuse asm-generic/barrier.h

From: peterz@infradead.org (Peter Zijlstra)
Date: 2016-01-12 09:28:00
Also in: linux-arch, linux-mips, linux-s390, linux-sh, linux-um, linuxppc-dev, lkml, sparclinux, virtualization

On Mon, Jan 11, 2016 at 05:14:14PM -0800, Leonid Yegoshin wrote:
This statement doesn't fit MIPS barriers variations. Moreover, there is a
reason to extend that even more specific, at least for smp_store_release and
smp_load_acquire, look into

    http://patchwork.linux-mips.org/patch/10506/
Dude, that's one horrible patch.

1) you do not make such things selectable; either the hardware needs
them or it doesn't. If it does you _must_ use them, however unlikely.

2) the changelog _completely_ fails to explain the sync 0x11 and sync
0x12 semantics nor does it provide a publicly accessible link to
documentation that does.

3) it really should have explained what you did with
smp_llsc_mb/smp_mb__before_llsc() in _detail_.

And I agree that ideally it should be split into parts.

Seriously, this is _NOT_ OK.
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