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authorAl Viro <viro@zeniv.linux.org.uk>2013-09-22 14:17:15 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2013-10-24 23:34:53 -0400
commite84f9e57b90ca89664d733a7cef19aa7ccd832f3 (patch)
tree2766cbae82e38a4356b161a7f48abfd9e4db56ce /include/linux/fs.h
parent7b00ed6fe6321547b9d51f5bfb30e7b5932e6889 (diff)
consolidate the reassignments of ->f_op in ->open() instances
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/fs.h')
-rw-r--r--include/linux/fs.h11
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h
index d80c2437d624..b09e4e1d747a 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1875,6 +1875,17 @@ extern struct dentry *mount_pseudo(struct file_system_type *, char *,
1875 (((fops) && try_module_get((fops)->owner) ? (fops) : NULL)) 1875 (((fops) && try_module_get((fops)->owner) ? (fops) : NULL))
1876#define fops_put(fops) \ 1876#define fops_put(fops) \
1877 do { if (fops) module_put((fops)->owner); } while(0) 1877 do { if (fops) module_put((fops)->owner); } while(0)
1878/*
1879 * This one is to be used *ONLY* from ->open() instances.
1880 * fops must be non-NULL, pinned down *and* module dependencies
1881 * should be sufficient to pin the caller down as well.
1882 */
1883#define replace_fops(f, fops) \
1884 do { \
1885 struct file *__file = (f); \
1886 fops_put(__file->f_op); \
1887 BUG_ON(!(__file->f_op = (fops))); \
1888 } while(0)
1878 1889
1879extern int register_filesystem(struct file_system_type *); 1890extern int register_filesystem(struct file_system_type *);
1880extern int unregister_filesystem(struct file_system_type *); 1891extern int unregister_filesystem(struct file_system_type *);