FIXMAP_PAGE_RO     50 include/asm-generic/fixmap.h #if !defined(FIXMAP_PAGE_RO) && defined(PAGE_KERNEL_RO)
FIXMAP_PAGE_RO    231 mm/early_ioremap.c #ifdef FIXMAP_PAGE_RO
FIXMAP_PAGE_RO    236 mm/early_ioremap.c 						     FIXMAP_PAGE_RO);