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VFS: Make get_filesystem() return the affected filesystem 

Make get_filesystem() return a pointer to the filesystem on which it just
got a ref.

Suggested-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
David Howells 2017-07-04 17:25:16 +01:00 committed by Al Viro
parent dd111b31e9
commit ee416bcdba
2 changed files with 3 additions and 2 deletions
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3
fs/filesystems.c
View File

@ -33,9 +33,10 @@ static struct file_system_type *file_systems;
static DEFINE_RWLOCK(file_systems_lock); static DEFINE_RWLOCK(file_systems_lock);
/* WARNING: This can be used only if we _already_ own a reference */ /* WARNING: This can be used only if we _already_ own a reference */
void get_filesystem(struct file_system_type *fs) struct file_system_type *get_filesystem(struct file_system_type *fs)
{ {
__module_get(fs->owner); __module_get(fs->owner);
return fs;
} }
void put_filesystem(struct file_system_type *fs) void put_filesystem(struct file_system_type *fs)

2
include/linux/fs.h
View File

@ -2956,7 +2956,7 @@ extern int generic_block_fiemap(struct inode *inode,
struct fiemap_extent_info *fieinfo, u64 start, struct fiemap_extent_info *fieinfo, u64 start,
u64 len, get_block_t *get_block); u64 len, get_block_t *get_block);
extern void get_filesystem(struct file_system_type *fs); extern struct file_system_type *get_filesystem(struct file_system_type *fs);
extern void put_filesystem(struct file_system_type *fs); extern void put_filesystem(struct file_system_type *fs);
extern struct file_system_type *get_fs_type(const char *name); extern struct file_system_type *get_fs_type(const char *name);
extern struct super_block *get_super(struct block_device *); extern struct super_block *get_super(struct block_device *);