From c0fe478dbb14fd32e71d1383dbe302b54ce94134 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Tue, 4 Aug 2009 16:02:43 +0900 Subject: sh: Provide __flush_anon_page(). This provides a __flush_anon_page() that handles both the aliasing and non-aliasing cases. This fixes up some crashes with heavy get_user_pages() users. Signed-off-by: Paul Mundt --- arch/sh/mm/pg-mmu.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'arch/sh/mm') diff --git a/arch/sh/mm/pg-mmu.c b/arch/sh/mm/pg-mmu.c index a9ede7bae520..027c4d83fb8e 100644 --- a/arch/sh/mm/pg-mmu.c +++ b/arch/sh/mm/pg-mmu.c @@ -157,3 +157,20 @@ void __update_cache(struct vm_area_struct *vma, } } } + +void __flush_anon_page(struct page *page, unsigned long vmaddr) +{ + unsigned long addr = (unsigned long) page_address(page); + + if (pages_do_alias(addr, vmaddr)) { + if (boot_cpu_data.dcache.n_aliases && page_mapped(page) && + !test_bit(PG_dcache_dirty, &page->flags)) { + void *kaddr; + + kaddr = kmap_coherent(page, vmaddr); + __flush_wback_region((void *)kaddr, PAGE_SIZE); + kunmap_coherent(); + } else + __flush_wback_region((void *)addr, PAGE_SIZE); + } +} -- cgit v1.2.3