Commit a67cc9aa authored by Max Filippov's avatar Max Filippov Committed by Chris Zankel
Browse files

xtensa: fix preemption in {clear,copy}_user_highpage 



Disabling pagefault makes little sense there, preemption disabling is
what was meant.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
parent 362014c8

arch/xtensa/mm/cache.c

+4 −4
Original line number Diff line number Diff line
@@ -97,11 +97,11 @@ void clear_user_highpage(struct page *page, unsigned long vaddr) 
	unsigned long paddr;

	void *kvaddr = coherent_kvaddr(page, TLBTEMP_BASE_1, vaddr, &paddr);



	pagefault_disable();

	preempt_disable();

	kmap_invalidate_coherent(page, vaddr);

	set_bit(PG_arch_1, &page->flags);

	clear_page_alias(kvaddr, paddr);

	pagefault_enable();

	preempt_enable();

}



void copy_user_highpage(struct page *dst, struct page *src,
@@ -113,11 +113,11 @@ void copy_user_highpage(struct page *dst, struct page *src, 
	void *src_vaddr = coherent_kvaddr(src, TLBTEMP_BASE_2, vaddr,

					  &src_paddr);



	pagefault_disable();

	preempt_disable();

	kmap_invalidate_coherent(dst, vaddr);

	set_bit(PG_arch_1, &dst->flags);

	copy_page_alias(dst_vaddr, src_vaddr, dst_paddr, src_paddr);

	pagefault_enable();

	preempt_enable();

}



#endif /* DCACHE_WAY_SIZE > PAGE_SIZE */