diff options
| -rw-r--r-- | mm/madvise.c | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/mm/madvise.c b/mm/madvise.c index b17f684322ad..26fa868b41af 100644 --- a/mm/madvise.c +++ b/mm/madvise.c @@ -48,6 +48,11 @@ struct madvise_walk_private { bool pageout; }; +struct madvise_behavior { + int behavior; + struct mmu_gather *tlb; +}; + /* * Any behaviour which results in changes to the vma->vm_flags needs to * take mmap_lock for writing. Others, which simply traverse vmas, need @@ -893,8 +898,9 @@ static bool madvise_dontneed_free_valid_vma(struct vm_area_struct *vma, static long madvise_dontneed_free(struct vm_area_struct *vma, struct vm_area_struct **prev, unsigned long start, unsigned long end, - int behavior) + struct madvise_behavior *madv_behavior) { + int behavior = madv_behavior->behavior; struct mm_struct *mm = vma->vm_mm; *prev = vma; @@ -1249,8 +1255,10 @@ static long madvise_guard_remove(struct vm_area_struct *vma, static int madvise_vma_behavior(struct vm_area_struct *vma, struct vm_area_struct **prev, unsigned long start, unsigned long end, - unsigned long behavior) + void *behavior_arg) { + struct madvise_behavior *arg = behavior_arg; + int behavior = arg->behavior; int error; struct anon_vma_name *anon_name; unsigned long new_flags = vma->vm_flags; @@ -1270,7 +1278,7 @@ static int madvise_vma_behavior(struct vm_area_struct *vma, case MADV_FREE: case MADV_DONTNEED: case MADV_DONTNEED_LOCKED: - return madvise_dontneed_free(vma, prev, start, end, behavior); + return madvise_dontneed_free(vma, prev, start, end, arg); case MADV_NORMAL: new_flags = new_flags & ~VM_RAND_READ & ~VM_SEQ_READ; break; @@ -1487,10 +1495,10 @@ static bool process_madvise_remote_valid(int behavior) */ static int madvise_walk_vmas(struct mm_struct *mm, unsigned long start, - unsigned long end, unsigned long arg, + unsigned long end, void *arg, int (*visit)(struct vm_area_struct *vma, struct vm_area_struct **prev, unsigned long start, - unsigned long end, unsigned long arg)) + unsigned long end, void *arg)) { struct vm_area_struct *vma; struct vm_area_struct *prev; @@ -1548,7 +1556,7 @@ int madvise_walk_vmas(struct mm_struct *mm, unsigned long start, static int madvise_vma_anon_name(struct vm_area_struct *vma, struct vm_area_struct **prev, unsigned long start, unsigned long end, - unsigned long anon_name) + void *anon_name) { int error; @@ -1557,7 +1565,7 @@ static int madvise_vma_anon_name(struct vm_area_struct *vma, return -EBADF; error = madvise_update_vma(vma, prev, start, end, vma->vm_flags, - (struct anon_vma_name *)anon_name); + anon_name); /* * madvise() returns EAGAIN if kernel resources, such as @@ -1589,7 +1597,7 @@ int madvise_set_anon_name(struct mm_struct *mm, unsigned long start, if (end == start) return 0; - return madvise_walk_vmas(mm, start, end, (unsigned long)anon_name, + return madvise_walk_vmas(mm, start, end, anon_name, madvise_vma_anon_name); } #endif /* CONFIG_ANON_VMA_NAME */ @@ -1677,8 +1685,10 @@ static bool is_madvise_populate(int behavior) } static int madvise_do_behavior(struct mm_struct *mm, - unsigned long start, size_t len_in, int behavior) + unsigned long start, size_t len_in, + struct madvise_behavior *madv_behavior) { + int behavior = madv_behavior->behavior; struct blk_plug plug; unsigned long end; int error; @@ -1692,7 +1702,7 @@ static int madvise_do_behavior(struct mm_struct *mm, if (is_madvise_populate(behavior)) error = madvise_populate(mm, start, end, behavior); else - error = madvise_walk_vmas(mm, start, end, behavior, + error = madvise_walk_vmas(mm, start, end, madv_behavior, madvise_vma_behavior); blk_finish_plug(&plug); return error; @@ -1773,13 +1783,14 @@ static int madvise_do_behavior(struct mm_struct *mm, int do_madvise(struct mm_struct *mm, unsigned long start, size_t len_in, int behavior) { int error; + struct madvise_behavior madv_behavior = {.behavior = behavior}; if (madvise_should_skip(start, len_in, behavior, &error)) return error; error = madvise_lock(mm, behavior); if (error) return error; - error = madvise_do_behavior(mm, start, len_in, behavior); + error = madvise_do_behavior(mm, start, len_in, &madv_behavior); madvise_unlock(mm, behavior); return error; @@ -1796,6 +1807,7 @@ static ssize_t vector_madvise(struct mm_struct *mm, struct iov_iter *iter, { ssize_t ret = 0; size_t total_len; + struct madvise_behavior madv_behavior = {.behavior = behavior}; total_len = iov_iter_count(iter); @@ -1811,7 +1823,8 @@ static ssize_t vector_madvise(struct mm_struct *mm, struct iov_iter *iter, if (madvise_should_skip(start, len_in, behavior, &error)) ret = error; else - ret = madvise_do_behavior(mm, start, len_in, behavior); + ret = madvise_do_behavior(mm, start, len_in, + &madv_behavior); /* * An madvise operation is attempting to restart the syscall, * but we cannot proceed as it would not be correct to repeat |