Merge remote-tracking branch 'oneiric-ubuntu/pandaboard' into pandaboard-litmus

Remote branch is from Ubuntu Oneiric (tag Ubuntu-3.0.0-1215.27) with
minor patch to the TWL-RTC code. Trying to pull this into LITMUS^RT
staging (as of 9/20/2012) to get LITMUS^RT running on the PandaBoard.

Conflicts:
	Makefile
	fs/exec.c
	include/linux/fs.h
	kernel/fork.c

5 files changed, 236 insertions, 5 deletions

diff --git a/include/trace/events/asoc.h b/include/trace/events/asoc.h
index ae973d2e27a..603f5a0f036 100644
--- a/include/trace/events/asoc.h
+++ b/include/trace/events/asoc.h
@@ -9,6 +9,7 @@
 
 struct snd_soc_jack;
 struct snd_soc_codec;
+struct snd_soc_platform;
 struct snd_soc_card;
 struct snd_soc_dapm_widget;
 
@@ -59,6 +60,50 @@ DEFINE_EVENT(snd_soc_reg, snd_soc_reg_read,
 
 );
 
+DECLARE_EVENT_CLASS(snd_soc_preg,
+
+        TP_PROTO(struct snd_soc_platform *platform, unsigned int reg,
+                 unsigned int val),
+
+        TP_ARGS(platform, reg, val),
+
+        TP_STRUCT__entry(
+                __string(       name,           platform->name  )
+                __field(        int,            id              )
+                __field(        unsigned int,   reg             )
+                __field(        unsigned int,   val             )
+        ),
+
+        TP_fast_assign(
+                __assign_str(name, platform->name);
+                __entry->id = platform->id;
+                __entry->reg = reg;
+                __entry->val = val;
+        ),
+
+        TP_printk("platform=%s.%d reg=%x val=%x", __get_str(name),
+                  (int)__entry->id, (unsigned int)__entry->reg,
+                  (unsigned int)__entry->val)
+);
+
+DEFINE_EVENT(snd_soc_preg, snd_soc_preg_write,
+
+        TP_PROTO(struct snd_soc_platform *platform, unsigned int reg,
+                 unsigned int val),
+
+        TP_ARGS(platform, reg, val)
+
+);
+
+DEFINE_EVENT(snd_soc_preg, snd_soc_preg_read,
+
+        TP_PROTO(struct snd_soc_platform *platform, unsigned int reg,
+                 unsigned int val),
+
+        TP_ARGS(platform, reg, val)
+
+);
+
 DECLARE_EVENT_CLASS(snd_soc_card,
 
         TP_PROTO(struct snd_soc_card *card, int val),
diff --git a/include/trace/events/fs.h b/include/trace/events/fs.h
new file mode 100644
index 00000000000..2cbb8fed1ae
--- /dev/null
+++ b/include/trace/events/fs.h
@@ -0,0 +1,53 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM fs
+
+#if !defined(_TRACE_FS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_FS_H
+
+#include <linux/fs.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(do_sys_open,
+
+        TP_PROTO(char *filename, int flags, int mode),
+
+        TP_ARGS(filename, flags, mode),
+
+        TP_STRUCT__entry(
+                __string(       filename, filename              )
+                __field(        int, flags                      )
+                __field(        int, mode                       )
+        ),
+
+        TP_fast_assign(
+                __assign_str(filename, filename);
+                __entry->flags = flags;
+                __entry->mode = mode;
+        ),
+
+        TP_printk("\"%s\" %x %o",
+                  __get_str(filename), __entry->flags, __entry->mode)
+);
+
+TRACE_EVENT(open_exec,
+
+        TP_PROTO(char *filename),
+
+        TP_ARGS(filename),
+
+        TP_STRUCT__entry(
+                __string(       filename, filename              )
+        ),
+
+        TP_fast_assign(
+                __assign_str(filename, filename);
+        ),
+
+        TP_printk("\"%s\"",
+                  __get_str(filename))
+);
+
+#endif /* _TRACE_FS_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/include/trace/events/vfs.h b/include/trace/events/vfs.h
new file mode 100644
index 00000000000..3c170f893cc
--- /dev/null
+++ b/include/trace/events/vfs.h
@@ -0,0 +1,53 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM vfs
+
+#if !defined(_TRACE_VFS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_VFS_H
+
+/*
+ * Tracepoint for dirtying an inode:
+ */
+TRACE_EVENT(dirty_inode,
+
+        TP_PROTO(struct inode *inode, struct task_struct *task),
+
+        TP_ARGS(inode, task),
+
+        TP_STRUCT__entry(
+                __array( char,  comm,   TASK_COMM_LEN   )
+                __field( pid_t, pid                     )
+                __array( char,  dev,    16              )
+                __array( char,  file,   32              )
+        ),
+
+        TP_fast_assign(
+                if (inode->i_ino || strcmp(inode->i_sb->s_id, "bdev")) {
+                        struct dentry *dentry;
+                        const char *name = "?";
+
+                        dentry = d_find_alias(inode);
+                        if (dentry) {
+                                spin_lock(&dentry->d_lock);
+                                name = (const char *) dentry->d_name.name;
+                        }
+
+                        memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
+                        __entry->pid = task->pid;
+                        strlcpy(__entry->file, name, 32);
+                        strlcpy(__entry->dev, inode->i_sb->s_id, 16);
+
+                        if (dentry) {
+                                spin_unlock(&dentry->d_lock);
+                                dput(dentry);
+                        }
+                }
+        ),
+
+        TP_printk("task=%i (%s) file=%s dev=%s",
+                __entry->pid, __entry->comm, __entry->file, __entry->dev)
+);
+
+#endif /* _TRACE_VFS_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/include/trace/events/vmscan.h b/include/trace/events/vmscan.h
index b2c33bd955f..edc4b3d25a2 100644
--- a/include/trace/events/vmscan.h
+++ b/include/trace/events/vmscan.h
@@ -179,6 +179,83 @@ DEFINE_EVENT(mm_vmscan_direct_reclaim_end_template, mm_vmscan_memcg_softlimit_re
         TP_ARGS(nr_reclaimed)
 );
 
+TRACE_EVENT(mm_shrink_slab_start,
+        TP_PROTO(struct shrinker *shr, struct shrink_control *sc,
+                long nr_objects_to_shrink, unsigned long pgs_scanned,
+                unsigned long lru_pgs, unsigned long cache_items,
+                unsigned long long delta, unsigned long total_scan),
+
+        TP_ARGS(shr, sc, nr_objects_to_shrink, pgs_scanned, lru_pgs,
+                cache_items, delta, total_scan),
+
+        TP_STRUCT__entry(
+                __field(struct shrinker *, shr)
+                __field(void *, shrink)
+                __field(long, nr_objects_to_shrink)
+                __field(gfp_t, gfp_flags)
+                __field(unsigned long, pgs_scanned)
+                __field(unsigned long, lru_pgs)
+                __field(unsigned long, cache_items)
+                __field(unsigned long long, delta)
+                __field(unsigned long, total_scan)
+        ),
+
+        TP_fast_assign(
+                __entry->shr = shr;
+                __entry->shrink = shr->shrink;
+                __entry->nr_objects_to_shrink = nr_objects_to_shrink;
+                __entry->gfp_flags = sc->gfp_mask;
+                __entry->pgs_scanned = pgs_scanned;
+                __entry->lru_pgs = lru_pgs;
+                __entry->cache_items = cache_items;
+                __entry->delta = delta;
+                __entry->total_scan = total_scan;
+        ),
+
+        TP_printk("%pF %p: objects to shrink %ld gfp_flags %s pgs_scanned %ld lru_pgs %ld cache items %ld delta %lld total_scan %ld",
+                __entry->shrink,
+                __entry->shr,
+                __entry->nr_objects_to_shrink,
+                show_gfp_flags(__entry->gfp_flags),
+                __entry->pgs_scanned,
+                __entry->lru_pgs,
+                __entry->cache_items,
+                __entry->delta,
+                __entry->total_scan)
+);
+
+TRACE_EVENT(mm_shrink_slab_end,
+        TP_PROTO(struct shrinker *shr, int shrinker_retval,
+                long unused_scan_cnt, long new_scan_cnt),
+
+        TP_ARGS(shr, shrinker_retval, unused_scan_cnt, new_scan_cnt),
+
+        TP_STRUCT__entry(
+                __field(struct shrinker *, shr)
+                __field(void *, shrink)
+                __field(long, unused_scan)
+                __field(long, new_scan)
+                __field(int, retval)
+                __field(long, total_scan)
+        ),
+
+        TP_fast_assign(
+                __entry->shr = shr;
+                __entry->shrink = shr->shrink;
+                __entry->unused_scan = unused_scan_cnt;
+                __entry->new_scan = new_scan_cnt;
+                __entry->retval = shrinker_retval;
+                __entry->total_scan = new_scan_cnt - unused_scan_cnt;
+        ),
+
+        TP_printk("%pF %p: unused scan count %ld new scan count %ld total_scan %ld last shrinker return val %d",
+                __entry->shrink,
+                __entry->shr,
+                __entry->unused_scan,
+                __entry->new_scan,
+                __entry->total_scan,
+                __entry->retval)
+);
 
 DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
 
@@ -189,7 +266,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
                 unsigned long nr_lumpy_taken,
                 unsigned long nr_lumpy_dirty,
                 unsigned long nr_lumpy_failed,
-                int isolate_mode),
+                isolate_mode_t isolate_mode),
 
         TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode),
 
@@ -201,7 +278,7 @@ DECLARE_EVENT_CLASS(mm_vmscan_lru_isolate_template,
                 __field(unsigned long, nr_lumpy_taken)
                 __field(unsigned long, nr_lumpy_dirty)
                 __field(unsigned long, nr_lumpy_failed)
-                __field(int, isolate_mode)
+                __field(isolate_mode_t, isolate_mode)
         ),
 
         TP_fast_assign(
@@ -235,7 +312,7 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_lru_isolate,
                 unsigned long nr_lumpy_taken,
                 unsigned long nr_lumpy_dirty,
                 unsigned long nr_lumpy_failed,
-                int isolate_mode),
+                isolate_mode_t isolate_mode),
 
         TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
 
@@ -250,7 +327,7 @@ DEFINE_EVENT(mm_vmscan_lru_isolate_template, mm_vmscan_memcg_isolate,
                 unsigned long nr_lumpy_taken,
                 unsigned long nr_lumpy_dirty,
                 unsigned long nr_lumpy_failed,
-                int isolate_mode),
+                isolate_mode_t isolate_mode),
 
         TP_ARGS(order, nr_requested, nr_scanned, nr_taken, nr_lumpy_taken, nr_lumpy_dirty, nr_lumpy_failed, isolate_mode)
 
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 4e249b927ea..9b60c6fc6df 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -23,7 +23,10 @@ DECLARE_EVENT_CLASS(writeback_work_class,
                 __field(int, for_background)
         ),
         TP_fast_assign(
-                strncpy(__entry->name, dev_name(bdi->dev), 32);
+                struct device *dev = bdi->dev;
+                if (!dev)
+                        dev = default_backing_dev_info.dev;
+                strncpy(__entry->name, dev_name(dev), 32);
                 __entry->nr_pages = work->nr_pages;
                 __entry->sb_dev = work->sb ? work->sb->s_dev : 0;
                 __entry->sync_mode = work->sync_mode;