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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-23 12:24:56 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-23 12:24:56 -0800
commitcc673757e24d018d64ff8038e28835db1e2902c4 (patch)
tree6eab3dab15725cda04dafabe9a8440697dca26cc /mm
parentfa7d9a1d286e6bab49ffa59cbd3c8b394ce54339 (diff)
parente62e560fc8b65ef5debc9041a792d18a8f98b2ca (diff)
downloadlinux-linaro-stable-cc673757e24d018d64ff8038e28835db1e2902c4.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull final vfs updates from Al Viro: - The ->i_mutex wrappers (with small prereq in lustre) - a fix for too early freeing of symlink bodies on shmem (they need to be RCU-delayed) (-stable fodder) - followup to dedupe stuff merged this cycle * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vfs: abort dedupe loop if fatal signals are pending make sure that freeing shmem fast symlinks is RCU-delayed wrappers for ->i_mutex access lustre: remove unused declaration
Diffstat (limited to 'mm')
-rw-r--r--mm/filemap.c4
-rw-r--r--mm/shmem.c21
-rw-r--r--mm/swapfile.c12
3 files changed, 18 insertions, 19 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 2e7c8d980d5e..bc943867d68c 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2763,11 +2763,11 @@ ssize_t generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
struct inode *inode = file->f_mapping->host;
ssize_t ret;
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
ret = generic_write_checks(iocb, from);
if (ret > 0)
ret = __generic_file_write_iter(iocb, from);
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
if (ret > 0) {
ssize_t err;
diff --git a/mm/shmem.c b/mm/shmem.c
index fa2ceb2d2655..440e2a7e6c1c 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -701,8 +701,7 @@ static void shmem_evict_inode(struct inode *inode)
list_del_init(&info->swaplist);
mutex_unlock(&shmem_swaplist_mutex);
}
- } else
- kfree(info->symlink);
+ }
simple_xattrs_free(&info->xattrs);
WARN_ON(inode->i_blocks);
@@ -1902,7 +1901,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
if (whence != SEEK_DATA && whence != SEEK_HOLE)
return generic_file_llseek_size(file, offset, whence,
MAX_LFS_FILESIZE, i_size_read(inode));
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
/* We're holding i_mutex so we can access i_size directly */
if (offset < 0)
@@ -1926,7 +1925,7 @@ static loff_t shmem_file_llseek(struct file *file, loff_t offset, int whence)
if (offset >= 0)
offset = vfs_setpos(file, offset, MAX_LFS_FILESIZE);
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
return offset;
}
@@ -2091,7 +2090,7 @@ int shmem_add_seals(struct file *file, unsigned int seals)
if (seals & ~(unsigned int)F_ALL_SEALS)
return -EINVAL;
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
if (info->seals & F_SEAL_SEAL) {
error = -EPERM;
@@ -2114,7 +2113,7 @@ int shmem_add_seals(struct file *file, unsigned int seals)
error = 0;
unlock:
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
return error;
}
EXPORT_SYMBOL_GPL(shmem_add_seals);
@@ -2164,7 +2163,7 @@ static long shmem_fallocate(struct file *file, int mode, loff_t offset,
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
return -EOPNOTSUPP;
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
if (mode & FALLOC_FL_PUNCH_HOLE) {
struct address_space *mapping = file->f_mapping;
@@ -2277,7 +2276,7 @@ undone:
inode->i_private = NULL;
spin_unlock(&inode->i_lock);
out:
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
return error;
}
@@ -2549,13 +2548,12 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
info = SHMEM_I(inode);
inode->i_size = len-1;
if (len <= SHORT_SYMLINK_LEN) {
- info->symlink = kmemdup(symname, len, GFP_KERNEL);
- if (!info->symlink) {
+ inode->i_link = kmemdup(symname, len, GFP_KERNEL);
+ if (!inode->i_link) {
iput(inode);
return -ENOMEM;
}
inode->i_op = &shmem_short_symlink_operations;
- inode->i_link = info->symlink;
} else {
inode_nohighmem(inode);
error = shmem_getpage(inode, 0, &page, SGP_WRITE, NULL);
@@ -3132,6 +3130,7 @@ static struct inode *shmem_alloc_inode(struct super_block *sb)
static void shmem_destroy_callback(struct rcu_head *head)
{
struct inode *inode = container_of(head, struct inode, i_rcu);
+ kfree(inode->i_link);
kmem_cache_free(shmem_inode_cachep, SHMEM_I(inode));
}
diff --git a/mm/swapfile.c b/mm/swapfile.c
index c43f654a7b64..d2c37365e2d6 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1956,9 +1956,9 @@ SYSCALL_DEFINE1(swapoff, const char __user *, specialfile)
set_blocksize(bdev, old_block_size);
blkdev_put(bdev, FMODE_READ | FMODE_WRITE | FMODE_EXCL);
} else {
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
inode->i_flags &= ~S_SWAPFILE;
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
}
filp_close(swap_file, NULL);
@@ -2183,7 +2183,7 @@ static int claim_swapfile(struct swap_info_struct *p, struct inode *inode)
p->flags |= SWP_BLKDEV;
} else if (S_ISREG(inode->i_mode)) {
p->bdev = inode->i_sb->s_bdev;
- mutex_lock(&inode->i_mutex);
+ inode_lock(inode);
if (IS_SWAPFILE(inode))
return -EBUSY;
} else
@@ -2416,7 +2416,7 @@ SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)
mapping = swap_file->f_mapping;
inode = mapping->host;
- /* If S_ISREG(inode->i_mode) will do mutex_lock(&inode->i_mutex); */
+ /* If S_ISREG(inode->i_mode) will do inode_lock(inode); */
error = claim_swapfile(p, inode);
if (unlikely(error))
goto bad_swap;
@@ -2561,7 +2561,7 @@ bad_swap:
vfree(cluster_info);
if (swap_file) {
if (inode && S_ISREG(inode->i_mode)) {
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
inode = NULL;
}
filp_close(swap_file, NULL);
@@ -2574,7 +2574,7 @@ out:
if (name)
putname(name);
if (inode && S_ISREG(inode->i_mode))
- mutex_unlock(&inode->i_mutex);
+ inode_unlock(inode);
return error;
}