It is quite a maze of EXPORTED symbols leading up to the three actual
worker functions of GUP. Simplify this by reorganizing some of the code so
the EXPORTED symbols directly call the correct internal function with
validated and consistent arguments.
Consolidate all the assertions into one place at the top of the call
chains.
Remove some dead code.
Jason Gunthorpe (8):
mm/gup: have internal functions get the mmap_read_lock()
mm/gup: don't call __gup_longterm_locked() if FOLL_LONGTERM cannot be
set
mm/gup: simplify the external interface functions and consolidate
invariants
mm/gup: add an assertion that the mmap lock is locked
mm/gup: add FOLL_UNLOCK
mm/gup: make locked never NULL in the internal GUP functions
mm/gup: remove pin_user_pages_fast_only()
mm/gup: make get_user_pages_fast_only() return the common return value
include/linux/mm.h | 3 +-
mm/gup.c | 319 +++++++++++++++++++++------------------------
mm/huge_memory.c | 10 --
3 files changed, 150 insertions(+), 182 deletions(-)
base-commit: 5dc4c995db9eb45f6373a956eb1f69460e69e6d4
--
2.39.0
