diff options
| -rw-r--r-- | fs/hugetlbfs/inode.c | 8 | ||||
| -rw-r--r-- | include/linux/hugetlb.h | 4 | ||||
| -rw-r--r-- | mm/hugetlb.c | 23 | ||||
| -rw-r--r-- | mm/userfaultfd.c | 3 |
4 files changed, 11 insertions, 27 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index dd28a9b287da..ba54a0e12bbd 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -436,9 +436,7 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart, u32 hash; index = page->index; - hash = hugetlb_fault_mutex_hash(h, current->mm, - &pseudo_vma, - mapping, index, 0); + hash = hugetlb_fault_mutex_hash(h, mapping, index, 0); mutex_lock(&hugetlb_fault_mutex_table[hash]); /* @@ -557,7 +555,6 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset, struct address_space *mapping = inode->i_mapping; struct hstate *h = hstate_inode(inode); struct vm_area_struct pseudo_vma; - struct mm_struct *mm = current->mm; loff_t hpage_size = huge_page_size(h); unsigned long hpage_shift = huge_page_shift(h); pgoff_t start, index, end; @@ -621,8 +618,7 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset, addr = index * hpage_size; /* mutex taken here, fault path and hole punch */ - hash = hugetlb_fault_mutex_hash(h, mm, &pseudo_vma, mapping, - index, addr); + hash = hugetlb_fault_mutex_hash(h, mapping, index, addr); mutex_lock(&hugetlb_fault_mutex_table[hash]); /* See if already present in mapping to avoid alloc/free */ diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 7aa2de25c09c..50a07235032f 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -122,9 +122,7 @@ void putback_active_hugepage(struct page *page); void free_huge_page(struct page *page); void hugetlb_fix_reserve_counts(struct inode *inode); extern struct mutex *hugetlb_fault_mutex_table; -u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, - struct vm_area_struct *vma, - struct address_space *mapping, +u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping, pgoff_t idx, unsigned long address); pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud); diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 64a62584290c..741bdde54954 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3729,8 +3729,8 @@ retry: * handling userfault. Reacquire after handling * fault to make calling code simpler. */ - hash = hugetlb_fault_mutex_hash(h, mm, vma, mapping, - idx, address); + hash = hugetlb_fault_mutex_hash(h, mapping, idx, + address); mutex_unlock(&hugetlb_fault_mutex_table[hash]); ret = handle_userfault(&vmf, VM_UFFD_MISSING); mutex_lock(&hugetlb_fault_mutex_table[hash]); @@ -3842,21 +3842,14 @@ backout_unlocked: } #ifdef CONFIG_SMP -u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, - struct vm_area_struct *vma, - struct address_space *mapping, +u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping, pgoff_t idx, unsigned long address) { unsigned long key[2]; u32 hash; - if (vma->vm_flags & VM_SHARED) { - key[0] = (unsigned long) mapping; - key[1] = idx; - } else { - key[0] = (unsigned long) mm; - key[1] = address >> huge_page_shift(h); - } + key[0] = (unsigned long) mapping; + key[1] = idx; hash = jhash2((u32 *)&key, sizeof(key)/sizeof(u32), 0); @@ -3867,9 +3860,7 @@ u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, * For uniprocesor systems we always use a single mutex, so just * return 0 and avoid the hashing overhead. */ -u32 hugetlb_fault_mutex_hash(struct hstate *h, struct mm_struct *mm, - struct vm_area_struct *vma, - struct address_space *mapping, +u32 hugetlb_fault_mutex_hash(struct hstate *h, struct address_space *mapping, pgoff_t idx, unsigned long address) { return 0; @@ -3915,7 +3906,7 @@ int hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma, * get spurious allocation failures if two CPUs race to instantiate * the same page in the page cache. */ - hash = hugetlb_fault_mutex_hash(h, mm, vma, mapping, idx, address); + hash = hugetlb_fault_mutex_hash(h, mapping, idx, address); mutex_lock(&hugetlb_fault_mutex_table[hash]); entry = huge_ptep_get(ptep); diff --git a/mm/userfaultfd.c b/mm/userfaultfd.c index 5d70fdbd8bc0..d3b4a78d79b6 100644 --- a/mm/userfaultfd.c +++ b/mm/userfaultfd.c @@ -272,8 +272,7 @@ retry: */ idx = linear_page_index(dst_vma, dst_addr); mapping = dst_vma->vm_file->f_mapping; - hash = hugetlb_fault_mutex_hash(h, dst_mm, dst_vma, mapping, - idx, dst_addr); + hash = hugetlb_fault_mutex_hash(h, mapping, idx, dst_addr); mutex_lock(&hugetlb_fault_mutex_table[hash]); err = -ENOMEM; |