Commit bcd022801ee5 ("MIPS: Fix COW D-cache aliasing on fork") replaced the inline function copy_user_page for mips with an external reference, but neglected to introduce the actual non-inline function. Restore it.
Fixes: bcd022801ee5 ("MIPS: Fix COW D-cache aliasing on fork") Fixes: 4927b7d77c00 ("dax,ext2: replace the XIP page fault handler with the DAX page fault handler") Cc: Atsushi Nemoto <an...@mba.ocn.ne.jp> Cc: Matthew Wilcox <matthew.r.wil...@intel.com> Signed-off-by: Guenter Roeck <li...@roeck-us.net> --- 4927b7d77c00 is in -next. arch/mips/include/asm/page.h | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h index 154b70a..69c2f19 100644 --- a/arch/mips/include/asm/page.h +++ b/arch/mips/include/asm/page.h @@ -105,8 +105,17 @@ static inline void clear_user_page(void *addr, unsigned long vaddr, flush_data_cache_page((unsigned long)addr); } -extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, - struct page *to); +static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, + struct page *to) +{ + extern void (*flush_data_cache_page)(unsigned long addr); + + copy_page(vto, vfrom); + if (!cpu_has_ic_fills_f_dc || pages_do_alias((unsigned long)vto, + vaddr & PAGE_MASK)) + flush_data_cache_page((unsigned long)vto); +} + struct vm_area_struct; extern void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/