x86: delay the export removal of init_mm

delay the removal of this symbol export by one more kernel release,
giving external modules such as VirtualBox a chance to stop using it.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 13 insertions, 0 deletions

diff --git a/Documentation/feature-removal-schedule.txt b/Documentation/feature-removal-schedule.txt
index ba899ff2a8f9..c1d1fd0c299b 100644
--- a/Documentation/feature-removal-schedule.txt
+++ b/Documentation/feature-removal-schedule.txt
@@ -316,3 +316,15 @@ Why:	Largely unmaintained and almost entirely unused.  File system
         is largely pointless as without a lot of work only the most
         trivial of Solaris binaries can work with the emulation code.
 Who:    David S. Miller <davem@davemloft.net>
+
+---------------------------
+
+What:   init_mm export
+When:   2.6.26
+Why:    Not used in-tree. The current out-of-tree users used it to
+        work around problems in the CPA code which should be resolved
+        by now. One usecase was described to provide verification code
+        of the CPA operation. That's a good idea in general, but such
+        code / infrastructure should be in the kernel and not in some
+        out-of-tree driver.
+Who:    Thomas Gleixner <tglx@linutronix.de>
diff --git a/arch/x86/kernel/init_task.c b/arch/x86/kernel/init_task.c
index 5b3ce7934363..3d01e47777db 100644
--- a/arch/x86/kernel/init_task.c
+++ b/arch/x86/kernel/init_task.c
@@ -15,6 +15,7 @@ static struct files_struct init_files = INIT_FILES;
 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
 struct mm_struct init_mm = INIT_MM(init_mm);
+EXPORT_UNUSED_SYMBOL(init_mm); /* will be removed in 2.6.26 */
 
 /*
  * Initial thread structure.