From: Jérôme Glisse <jglisse@xxxxxxxxxx> Removed pointless VM_BUG_ON() cced stable when appropriate and splitted the last patch into _many_ smaller patches to make it easier to review. The end result is same modulo comments i received so far and the extra documentation i added while splitting thing up. Below is previous cover letter (everything in it is still true): ---------------------------------------------------------------------- All patches only impact HMM user, there is no implication outside HMM. First patch improve documentation to better reflect what HMM is. Second patch fix #if/#else placement in hmm.h. The third patch add a call on mm release which helps device driver who use HMM to clean up early when a process quit. Finaly last patch modify the CPU snapshot and page fault helper to simplify device driver. The nouveau patchset i posted last week already depends on all of those patches. You can find them in a hmm-for-4.17 branch: git://people.freedesktop.org/~glisse/linux https://cgit.freedesktop.org/~glisse/linux/log/?h=hmm-for-4.17 Cc: Ralph Campbell <rcampbell@xxxxxxxxxx> Cc: Evgeny Baskakov <ebaskakov@xxxxxxxxxx> Cc: Mark Hairgrove <mhairgrove@xxxxxxxxxx> Cc: John Hubbard <jhubbard@xxxxxxxxxx> Jérôme Glisse (12): mm/hmm: fix header file if/else/endif maze mm/hmm: hmm_pfns_bad() was accessing wrong struct mm/hmm: use struct for hmm_vma_fault(), hmm_vma_get_pfns() parameters mm/hmm: remove HMM_PFN_READ flag and ignore peculiar architecture mm/hmm: use uint64_t for HMM pfn instead of defining hmm_pfn_t to ulong mm/hmm: cleanup special vma handling (VM_SPECIAL) mm/hmm: do not differentiate between empty entry or missing directory mm/hmm: rename HMM_PFN_DEVICE_UNADDRESSABLE to HMM_PFN_DEVICE_PRIVATE mm/hmm: move hmm_pfns_clear() closer to where it is use mm/hmm: factor out pte and pmd handling to simplify hmm_vma_walk_pmd() mm/hmm: change hmm_vma_fault() to allow write fault on page basis mm/hmm: use device driver encoding for HMM pfn Ralph Campbell (2): mm/hmm: documentation editorial update to HMM documentation mm/hmm: HMM should have a callback before MM is destroyed v2 Documentation/vm/hmm.txt | 360 +++++++++++++++++----------------- MAINTAINERS | 1 + include/linux/hmm.h | 156 ++++++++------- mm/hmm.c | 495 +++++++++++++++++++++++++++++------------------ 4 files changed, 582 insertions(+), 430 deletions(-) -- 2.14.3
