From 56008c04ebc099940021b714da2d7779117cf6a7 Mon Sep 17 00:00:00 2001 From: John David Anglin Date: Tue, 25 Jul 2017 17:23:35 -0400 Subject: [PATCH] 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 Cc: stable@vger.kernel.org # 4.9+ Signed-off-by: Helge Deller --- arch/parisc/kernel/cache.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 3a64ebb..85a92db 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -453,8 +453,8 @@ void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, 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); -- 2.7.4