diff options
Diffstat (limited to 'mm/shmem.c')
| -rw-r--r-- | mm/shmem.c | 34 |
1 files changed, 16 insertions, 18 deletions
diff --git a/mm/shmem.c b/mm/shmem.c index 90b576cbc06..f514dd392cd 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -244,9 +244,8 @@ static void shmem_free_inode(struct super_block *sb) } } -/* +/** * shmem_recalc_inode - recalculate the size of an inode - * * @inode: inode to recalc * * We have to calculate the free blocks since the mm can drop @@ -270,9 +269,8 @@ static void shmem_recalc_inode(struct inode *inode) } } -/* +/** * shmem_swp_entry - find the swap vector position in the info structure - * * @info: info structure for the inode * @index: index of the page to find * @page: optional page to add to the structure. Has to be preset to @@ -374,13 +372,13 @@ static void shmem_swp_set(struct shmem_inode_info *info, swp_entry_t *entry, uns } } -/* +/** * shmem_swp_alloc - get the position of the swap entry for the page. - * If it does not exist allocate the entry. - * * @info: info structure for the inode * @index: index of the page to find * @sgp: check and recheck i_size? skip allocation? + * + * If the entry does not exist, allocate it. */ static swp_entry_t *shmem_swp_alloc(struct shmem_inode_info *info, unsigned long index, enum sgp_type sgp) { @@ -440,9 +438,8 @@ static swp_entry_t *shmem_swp_alloc(struct shmem_inode_info *info, unsigned long return entry; } -/* +/** * shmem_free_swp - free some swap entries in a directory - * * @dir: pointer to the directory * @edir: pointer after last entry of the directory * @punch_lock: pointer to spinlock when needed for the holepunch case @@ -1370,14 +1367,17 @@ repeat: shmem_swp_unmap(entry); spin_unlock(&info->lock); unlock_page(swappage); - page_cache_release(swappage); if (error == -ENOMEM) { /* allow reclaim from this memory cgroup */ - error = mem_cgroup_cache_charge(NULL, + error = mem_cgroup_cache_charge(swappage, current->mm, gfp & ~__GFP_HIGHMEM); - if (error) + if (error) { + page_cache_release(swappage); goto failed; + } + mem_cgroup_uncharge_page(swappage); } + page_cache_release(swappage); goto repeat; } } else if (sgp == SGP_READ && !filepage) { @@ -2019,7 +2019,7 @@ static const struct inode_operations shmem_symlink_inode_operations = { }; #ifdef CONFIG_TMPFS_POSIX_ACL -/** +/* * Superblocks without xattr inode operations will get security.* xattr * support from the VFS "for free". As soon as we have any other xattrs * like ACLs, we also need to implement the security.* handlers at @@ -2558,12 +2558,11 @@ out4: } module_init(init_tmpfs) -/* +/** * shmem_file_setup - get an unlinked file living in tmpfs - * * @name: name for dentry (to be seen in /proc/<pid>/maps * @size: size to be set for the file - * + * @flags: vm_flags */ struct file *shmem_file_setup(char *name, loff_t size, unsigned long flags) { @@ -2618,9 +2617,8 @@ put_memory: return ERR_PTR(error); } -/* +/** * shmem_zero_setup - setup a shared anonymous mapping - * * @vma: the vma to be mmapped is prepared by do_mmap_pgoff */ int shmem_zero_setup(struct vm_area_struct *vma) |