From: John David Anglin Date: Tue, 25 Jul 2017 21:23:35 +0000 (-0400) Subject: parisc: Extend disabled preemption in copy_user_page X-Git-Tag: v4.13-rc3~20^2 X-Git-Url: https://git.karo-electronics.de/?p=karo-tx-linux.git;a=commitdiff_plain;h=56008c04ebc099940021b714da2d7779117cf6a7 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 --- diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 3a64ebb39ac7..85a92db70afc 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);