ext4: Fix include/trace/events/ext4.h to work with Systemtap

Using relative pathnames in #include statements interacts badly with SystemTap, since the fs/ext4/*.h header files are not packaged up as part of a distribution kernel's header files. Since systemtap doesn't use TP_fast_assign(), we can use a blind structure definition and then make sure the needed header files are defined before the ext4 source files #include the trace/events/ext4.h header file. https://bugzilla.redhat.com/show_bug.cgi?id=512478 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
mariux64 · Sep 15, 2009 · 3661d28 · 3661d28
1 parent 7ad9bb6
commit 3661d28
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
@@ -45,6 +45,7 @@
 #include "ext4_jbd2.h"
 #include "xattr.h"
 #include "acl.h"
+#include "mballoc.h"
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/ext4.h>

diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
@@ -5,10 +5,12 @@
 #define _TRACE_EXT4_H
 
 #include <linux/writeback.h>
-#include "../../../fs/ext4/ext4.h"
-#include "../../../fs/ext4/mballoc.h"
 #include <linux/tracepoint.h>
 
+struct ext4_allocation_context;
+struct ext4_allocation_request;
+struct ext4_prealloc_space;
+
 TRACE_EVENT(ext4_free_inode,
 	TP_PROTO(struct inode *inode),