On 4/28/25 17:28, Lorenzo Stoakes wrote: > This is a key step in our being able to abstract and isolate VMA allocation > and destruction logic. > > This function is the last one where vm_area_free() and vm_area_dup() are > directly referenced outside of mmap, so having this in mm allows us to > isolate these. > > We do the same for the nommu version which is substantially simpler. > > We place the declaration for dup_mmap() in mm/internal.h and have > kernel/fork.c import this in order to prevent improper use of this > functionality elsewhere in the kernel. > > While we're here, we remove the useless #ifdef CONFIG_MMU check around > mmap_read_lock_maybe_expand() in mmap.c, mmap.c is compiled only if > CONFIG_MMU is set. > > Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> > Suggested-by: Pedro Falcato <pfalcato@xxxxxxx> > Reviewed-by: Pedro Falcato <pfalcato@xxxxxxx> Reviewed-by: Vlastimil Babka <vbabka@xxxxxxx>
