linux-master/mm/nommu.c

535 	/* add the VMA to the mapping */
537 		struct address_space *mapping = vma->vm_file->f_mapping;
539 		i_mmap_lock_write(mapping);
540 		flush_dcache_mmap_lock(mapping);
541 		vma_interval_tree_insert(vma, &mapping->i_mmap);
542 		flush_dcache_mmap_unlock(mapping);
543 		i_mmap_unlock_write(mapping);
550 	/* remove the VMA from the mapping */
552 		struct address_space *mapping;
553 		mapping = vma->vm_file->f_mapping;
555 		i_mmap_lock_write(mapping);
556 		flush_dcache_mmap_lock(mapping);
557 		vma_interval_tree_remove(vma, &mapping->i_mmap);
558 		flush_dcache_mmap_unlock(mapping);
559 		i_mmap_unlock_write(mapping);
673  * determine whether a mapping should be permitted and, if so, what sort of
674  * mapping we're capable of supporting
771 			/* we don't permit a private writable mapping to be
831  * we've determined that we can make the mapping, now translate what we
850 		/* MAP_PRIVATE file mapping */
858 			 * R/O private file mapping which cannot be used to
862 			 * the file mapping, which will work e.g., on chardevs,
867 		/* MAP_SHARED file mapping: NOMMU_MAP_DIRECT is set. */
876  * set up a shared mapping on a file (the driver or filesystem provides and
898  * set up a private mapping or an anonymous shared mapping
910 	 * Invoke the file's mapping function so that it can keep track of
933 	/* allocate some memory to hold the mapping
996  * handle mapping creation for uClinux
1017 	/* decide whether we should attempt the mapping, and if so what sort of
1018 	 * mapping */
1028 	/* we've determined that we can make the mapping, now translate what we
1033 	/* we're going to need to record the mapping */
1057 	 * mmap() calls that overlap with our proposed mapping
1095 				/* new mapping is not a subset of the region */
1129 		/* obtain the address at which to make a shared mapping
1131 		 *   tell us the location of a shared mapping
1142 				 * the mapping so we'll have to attempt to copy
1158 	/* set up the mapping
1176 	/* okay... we have a mapping; now we have to register it */
1193 	 * mapping of it is made  */
1408  * release a mapping
1519  * expand (or shrink) an existing mapping, potentially moving it at the same
1522  * under NOMMU conditions, we only permit changing a mapping's size, and only
1645 		/* don't overrun this mapping */