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_PAGE_COW50include/asm-alpha/pgtable.h#define _PAGE_COW  0x10000
_PAGE_COW48include/asm-i386/pgtable.h#define _PAGE_COW  0x200  /* implemented in software (one of the AVL bits) */
_PAGE_COW58include/asm-mips/page.h#define _PAGE_COW                   (1<<1)  /* implemented in software */
_PAGE_COW53include/asm-sparc/pgtable.h#define _PAGE_COW       0x00800000   /* COW page, hardware ignores this bit (untested) */