From: Linus Torvalds <torvalds@linux-foundation.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
"James E.J. Bottomley" <James.Bottomley@hansenpartnership.com>,
Russell King <linux@armlinux.org.uk>, Guo Ren <guoren@kernel.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Nick Hu <nickhu@andestech.com>, Greentime Hu <green.hu@gmail.com>,
Vincent Chen <deanbo422@gmail.com>, Helge Deller <deller@gmx.de>,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>, Geoff Levand <geoff@infradead.org>,
Paul Cercueil <paul@crapouillou.net>,
Ulf Hansson <ulf.hansson@linaro.org>, Alex Shi <alexs@kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-csky@vger.kernel.org,
"open list:BROADCOM NVRAM DRIVER" <linux-mips@vger.kernel.org>,
linux-parisc@vger.kernel.org,
Linux-sh list <linux-sh@vger.kernel.org>,
linux-mmc@vger.kernel.org,
linux-scsi <linux-scsi@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>
Subject: Re: flush_kernel_dcache_page fixes and removal
Date: Mon, 12 Jul 2021 12:24:11 -0700 [thread overview]
Message-ID: <CAHk-=whd0GaAH7gHuEiuKjOeD6JGKY1q5ydG1TCKjVBFNBUEJA@mail.gmail.com> (raw)
In-Reply-To: <20210712060928.4161649-1-hch@lst.de>
On Sun, Jul 11, 2021 at 11:09 PM Christoph Hellwig <hch@lst.de> wrote:
>
> I think we should just remove it and eat the very minor overhead in
> exec rather than confusing poor driver writers.
Ack.
I think architectures that have virtual caches might want to think
about this patch a bit more, but on the whole I can't argue against
the "it's badly documented and misused".
No sane architecture will care, since dcache will be coherent (there
are more issues on the I$ side, but that's a different issue)
Linus
next prev parent reply other threads:[~2021-07-12 19:24 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 6:09 flush_kernel_dcache_page fixes and removal Christoph Hellwig
2021-07-12 6:09 ` [PATCH 1/6] mmc: JZ4740: remove the flush_kernel_dcache_page call in jz4740_mmc_read_data Christoph Hellwig
2021-07-19 8:15 ` Paul Cercueil
2021-08-04 11:12 ` Ulf Hansson
2021-07-12 6:09 ` [PATCH 2/6] mmc: mmc_spi: replace flush_kernel_dcache_page with flush_dcache_page Christoph Hellwig
2021-08-04 11:12 ` Ulf Hansson
2021-07-12 6:09 ` [PATCH 3/6] ps3disk: " Christoph Hellwig
2021-07-19 3:07 ` Geoff Levand
2021-07-12 6:09 ` [PATCH 4/6] scatterlist: " Christoph Hellwig
2021-07-12 6:09 ` [PATCH 5/6] aacraid: remove an unused include Christoph Hellwig
2021-07-19 1:50 ` Martin K. Petersen
2021-07-12 6:09 ` [PATCH 6/6] mm: remove flush_kernel_dcache_page Christoph Hellwig
2021-07-12 23:56 ` Ira Weiny
2021-07-12 19:24 ` Linus Torvalds [this message]
2021-07-13 5:46 ` flush_kernel_dcache_page fixes and removal Christoph Hellwig
2021-07-13 8:46 ` Russell King (Oracle)
2021-07-13 9:11 ` Christoph Hellwig
2021-07-19 5:38 ` Herbert Xu
2021-07-19 15:42 ` Russell King (Oracle)
2021-07-14 3:13 ` Guo Ren
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