From: <gregkh@linuxfoundation.org>
To: dave.anglin@bell.net, deller@gmx.de, gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "parisc: Extend disabled preemption in copy_user_page" has been added to the 4.12-stable tree
Date: Mon, 31 Jul 2017 13:52:14 -0700 [thread overview]
Message-ID: <1501534334134142@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
parisc: Extend disabled preemption in copy_user_page
to the 4.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
parisc-extend-disabled-preemption-in-copy_user_page.patch
and it can be found in the queue-4.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 56008c04ebc099940021b714da2d7779117cf6a7 Mon Sep 17 00:00:00 2001
From: John David Anglin <dave.anglin@bell.net>
Date: Tue, 25 Jul 2017 17:23:35 -0400
Subject: parisc: Extend disabled preemption in copy_user_page
From: John David Anglin <dave.anglin@bell.net>
commit 56008c04ebc099940021b714da2d7779117cf6a7 upstream.
It's always bothered me that we only disable preemption in
copy_user_page around the call to flush_dcache_page_asm.
This patch extends this to after the copy.
Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/parisc/kernel/cache.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/parisc/kernel/cache.c
+++ b/arch/parisc/kernel/cache.c
@@ -453,8 +453,8 @@ void copy_user_page(void *vto, void *vfr
before it can be accessed through the kernel mapping. */
preempt_disable();
flush_dcache_page_asm(__pa(vfrom), vaddr);
- preempt_enable();
copy_page_asm(vto, vfrom);
+ preempt_enable();
}
EXPORT_SYMBOL(copy_user_page);
Patches currently in stable-queue which might be from dave.anglin@bell.net are
queue-4.12/parisc-prevent-tlb-speculation-on-flushed-pages-on-cpus-that-only-support-equivalent-aliases.patch
queue-4.12/parisc-extend-disabled-preemption-in-copy_user_page.patch
reply other threads:[~2017-07-31 20:52 UTC|newest]
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