This is needed by drivers/media/dvb-core/dvbdev.c and was added in:
commit e84f9e57b90ca89664d733a7cef19aa7ccd832f3
Author: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date: Sun Sep 22 14:17:15 2013 -0400
consolidate the reassignments of ->f_op in ->open() instances
Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
---
backport/backport-include/linux/fs.h | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/backport/backport-include/linux/fs.h b/backport/backport-include/linux/fs.h
index 9de5109..9874f81 100644
--- a/backport/backport-include/linux/fs.h
+++ b/backport/backport-include/linux/fs.h
@@ -38,4 +38,18 @@ extern ssize_t simple_write_to_buffer(void *to, size_t available, loff_t *ppos,
const void __user *from, size_t count);
#endif
+#ifndef replace_fops
+/*
+ * This one is to be used *ONLY* from ->open() instances.
+ * fops must be non-NULL, pinned down *and* module dependencies
+ * should be sufficient to pin the caller down as well.
+ */
+#define replace_fops(f, fops) \
+ do { \
+ struct file *__file = (f); \
+ fops_put(__file->f_op); \
+ BUG_ON(!(__file->f_op = (fops))); \
+ } while(0)
+#endif /* replace_fops */
+
#endif /* _COMPAT_LINUX_FS_H */
--
1.7.10.4
--
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