Commit a7a76cef authored Apr 18, 2005 by Roland Dreier Committed by Greg KH Apr 18, 2005

[PATCH] debugfs: Reduce <linux/debugfs.h> dependencies



The current <linux/debugfs.h> include file is a little fragile in that
it is not self-contained and hence may cause compile warnings or
errors depending on the files included before it, the kernel config
and the architecture.  This patch makes things a little more robust by:

 - including <linux/types.h> to get definitions of u32, mode_t, and so on.
 - forward declaring struct file_operations.
 - including <linux/err.h> when CONFIG_DEBUG_FS is not set

The last change is particularly useful, as a kernel developer is
likely to build with debugfs always enabled and never see the build
breakage cased if debugfs is disabled.

Signed-off-by: Roland Dreier <roland@topspin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

parent 16941458

include/linux/debugfs.h

+7 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,10 @@

		#include <linux/fs.h>

		#include <linux/types.h>

		struct file_operations;

		#if defined(CONFIG_DEBUG_FS)
		struct dentry debugfs_create_file(const char name, mode_t mode,
		struct dentry parent, void data,
		@@ -36,6 +40,9 @@ struct dentry debugfs_create_bool(const char name, mode_t mode,
		struct dentry parent, u32 value);

		#else

		#include <linux/err.h>

		/*
		* We do not return NULL from these functions if CONFIG_DEBUG_FS is not enabled
		* so users have a chance to detect if there was a real error or not. We don't