Re: [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE

Russell King (Oracle)
2021-06-16T09:32:42Z

On Tue, Jun 15, 2021 at 08:21:12PM -0700, Andy Lutomirski wrote:
> On arm32, the only way to safely flush icache from usermode is to call
> cacheflush(2). This also handles any required pipeline flushes, so
> membarrier's SYNC_CORE feature is useless on arm. Remove it.

Yay! About time too.

Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

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