diff options
Diffstat (limited to 'mm/swapfile.c')
| -rw-r--r-- | mm/swapfile.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index aafcf3611b3..039e6167763 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -880,7 +880,7 @@ unsigned int count_swap_pages(int type, int free) static int unuse_pte(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr, swp_entry_t entry, struct page *page) { - struct mem_cgroup *ptr = NULL; + struct mem_cgroup *ptr; spinlock_t *ptl; pte_t *pte; int ret = 1; @@ -2088,7 +2088,6 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) p->swap_file = swap_file; mapping = swap_file->f_mapping; - inode = mapping->host; for (i = 0; i < nr_swapfiles; i++) { struct swap_info_struct *q = swap_info[i]; @@ -2101,6 +2100,8 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags) } } + inode = mapping->host; + /* If S_ISREG(inode->i_mode) will do mutex_lock(&inode->i_mutex); */ error = claim_swapfile(p, inode); if (unlikely(error)) goto bad_swap; @@ -2187,8 +2188,10 @@ bad_swap: spin_unlock(&swap_lock); vfree(swap_map); if (swap_file) { - if (inode && S_ISREG(inode->i_mode)) + if (inode && S_ISREG(inode->i_mode)) { mutex_unlock(&inode->i_mutex); + inode = NULL; + } filp_close(swap_file, NULL); } out: |