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Commit 3403ccc0 authored by Dave Chinner's avatar Dave Chinner Committed by Dave Chinner
Browse files

xfs: inode lockdep annotations broke non-lockdep build 



Fix CONFIG_LOCKDEP=n build, because asserts I put in to ensure we
aren't overrunning lockdep subclasses in commit 0952c818 ("xfs:
clean up inode lockdep annotations") use a define that doesn't
exist when CONFIG_LOCKDEP=n

Only check the subclass limits when lockdep is actually enabled.

Signed-off-by: default avatarDave Chinner <dchinner@redhat.com>
Reviewed-by: default avatarEric Sandeen <sandeen@redhat.com>
Signed-off-by: default avatarDave Chinner <david@fromorbit.com>
parent 3d751af2

fs/xfs/xfs_inode.c

+14 −2
Original line number Diff line number Diff line
@@ -362,6 +362,17 @@ int xfs_lots_retries; 
int xfs_lock_delays;

#endif



#ifdef CONFIG_LOCKDEP

static bool

xfs_lockdep_subclass_ok(

	int subclass)

{

	return subclass < MAX_LOCKDEP_SUBCLASSES;

}

#else

#define xfs_lockdep_subclass_ok(subclass)	(true)

#endif



/*

 * Bump the subclass so xfs_lock_inodes() acquires each lock with a different

 * value. This can be called for any type of inode lock combination, including
@@ -375,11 +386,12 @@ xfs_lock_inumorder(int lock_mode, int subclass) 


	ASSERT(!(lock_mode & (XFS_ILOCK_PARENT | XFS_ILOCK_RTBITMAP |

			      XFS_ILOCK_RTSUM)));

	ASSERT(xfs_lockdep_subclass_ok(subclass));



	if (lock_mode & (XFS_IOLOCK_SHARED|XFS_IOLOCK_EXCL)) {

		ASSERT(subclass <= XFS_IOLOCK_MAX_SUBCLASS);

		ASSERT(subclass + XFS_IOLOCK_PARENT_VAL <

						MAX_LOCKDEP_SUBCLASSES);

		ASSERT(xfs_lockdep_subclass_ok(subclass +

						XFS_IOLOCK_PARENT_VAL));

		class += subclass << XFS_IOLOCK_SHIFT;

		if (lock_mode & XFS_IOLOCK_PARENT)

			class += XFS_IOLOCK_PARENT_VAL << XFS_IOLOCK_SHIFT;