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authorFrederic Weisbecker <fweisbec@gmail.com>2009-03-23 01:10:44 +0300
committerIngo Molnar <mingo@elte.hu>2009-03-23 18:25:46 +0300
commitc0f92ba99bdeaf35f9c580291b4e1a657c67fbd4 (patch)
treee3e102f83c9a7fe44935ff7cd57540f4b6dce9e4 /include/linux/debugfs.h
parentb8b94265337f83b7db9c5f429b1769d463d7da8c (diff)
downloadlinux-c0f92ba99bdeaf35f9c580291b4e1a657c67fbd4.tar.xz
debugfs: function to know if debugfs is initialized
Impact: add new debugfs API With ftrace, some tracers are registered in early initcalls and attempt to create files on the debugfs filesystem. Depending on when they are activated, they can try to create their file at any time. Some checks can be done on the tracing area but providing a helper to know if debugfs is registered make it really more easy. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1237759847-21025-2-git-send-email-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/debugfs.h')
-rw-r--r--include/linux/debugfs.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index af0e01d4c663..eb5c2ba2f81a 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -71,6 +71,9 @@ struct dentry *debugfs_create_bool(const char *name, mode_t mode,
struct dentry *debugfs_create_blob(const char *name, mode_t mode,
struct dentry *parent,
struct debugfs_blob_wrapper *blob);
+
+bool debugfs_initialized(void);
+
#else
#include <linux/err.h>
@@ -183,6 +186,11 @@ static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
return ERR_PTR(-ENODEV);
}
+static inline bool debugfs_initialized(void)
+{
+ return false;
+}
+
#endif
#endif