[XFS] Fixing KDB's xrwtrc command, also added the current process id into

the trace.

SGI-PV: 948300
SGI-Modid: xfs-linux-melb:xfs-kern:208069a
Signed-off-by: Yingping Lu <yingping@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/linux-2.6/xfs_aops.c

@@ -103,7 +103,7 @@ xfs_page_trace(
 		(void *)((unsigned long)delalloc),
 		(void *)((unsigned long)unmapped),
 		(void *)((unsigned long)unwritten),
-		(void *)NULL,
+		(void *)((unsigned long)current_pid()),
 		(void *)NULL);
 }
 #else

fs/xfs/linux-2.6/xfs_lrw.c

@@ -83,7 +83,7 @@ xfs_rw_enter_trace(
 		(void *)((unsigned long)ioflags),
 		(void *)((unsigned long)((io->io_new_size >> 32) & 0xffffffff)),
 		(void *)((unsigned long)(io->io_new_size & 0xffffffff)),
-		(void *)NULL,
+		(void *)((unsigned long)current_pid()),
 		(void *)NULL,
 		(void *)NULL,
 		(void *)NULL,
@@ -113,7 +113,7 @@ xfs_inval_cached_trace(
 		(void *)((unsigned long)(first & 0xffffffff)),
 		(void *)((unsigned long)((last >> 32) & 0xffffffff)),
 		(void *)((unsigned long)(last & 0xffffffff)),
-		(void *)NULL,
+		(void *)((unsigned long)current_pid()),
 		(void *)NULL,
 		(void *)NULL,
 		(void *)NULL,

fs/xfs/xfs_inode.c

@@ -1372,10 +1372,10 @@ xfs_itrunc_trace(
 		     (void*)(unsigned long)((toss_finish >> 32) & 0xffffffff),
 		     (void*)(unsigned long)(toss_finish & 0xffffffff),
 		     (void*)(unsigned long)current_cpu(),
-		     (void*)0,
-		     (void*)0,
-		     (void*)0,
-		     (void*)0);
+		     (void*)(unsigned long)current_pid(),
+		     (void*)NULL,
+		     (void*)NULL,
+		     (void*)NULL);
 }
 #else
 #define	xfs_itrunc_trace(tag, ip, flag, new_size, toss_start, toss_finish)

fs/xfs/xfs_iomap.c

@@ -76,7 +76,7 @@ xfs_iomap_enter_trace(
 		(void *)((unsigned long)count),
 		(void *)((unsigned long)((io->io_new_size >> 32) & 0xffffffff)),
 		(void *)((unsigned long)(io->io_new_size & 0xffffffff)),
-		(void *)NULL,
+		(void *)((unsigned long)current_pid()),
 		(void *)NULL,
 		(void *)NULL,
 		(void *)NULL,