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parisc: Extend disabled preemption in copy_user_page 

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>
Cc: stable@vger.kernel.org # 4.9+
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
John David Anglin 2017-07-25 17:23:35 -04:00 committed by Helge Deller
parent ae7a609c34
commit 56008c04eb
1 changed files with 1 additions and 1 deletions
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arch/parisc/kernel/cache.c
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@ -453,8 +453,8 @@ void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
before it can be accessed through the kernel mapping. */ before it can be accessed through the kernel mapping. */
preempt_disable(); preempt_disable();
flush_dcache_page_asm(__pa(vfrom), vaddr); flush_dcache_page_asm(__pa(vfrom), vaddr);
preempt_enable();
copy_page_asm(vto, vfrom); copy_page_asm(vto, vfrom);
preempt_enable();
} }
EXPORT_SYMBOL(copy_user_page); EXPORT_SYMBOL(copy_user_page);