Merge commit 'v2.6.31-rc9' into tracing/core

Merge reason: move from -rc5 to -rc9.

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

3 files changed, 14 insertions, 27 deletions

diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 243bafc2ec90..3eb159c277c8 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -271,8 +271,8 @@ static void blk_trace_free(struct blk_trace *bt)
 {
         debugfs_remove(bt->msg_file);
         debugfs_remove(bt->dropped_file);
-        debugfs_remove(bt->dir);
         relay_close(bt->rchan);
+        debugfs_remove(bt->dir);
         free_percpu(bt->sequence);
         free_percpu(bt->msg_data);
         kfree(bt);
@@ -382,18 +382,8 @@ static int blk_subbuf_start_callback(struct rchan_buf *buf, void *subbuf,
 
 static int blk_remove_buf_file_callback(struct dentry *dentry)
 {
-        struct dentry *parent = dentry->d_parent;
         debugfs_remove(dentry);
 
-        /*
-        * this will fail for all but the last file, but that is ok. what we
-        * care about is the top level buts->name directory going away, when
-        * the last trace file is gone. Then we don't have to rmdir() that
-        * manually on trace stop, so it nicely solves the issue with
-        * force killing of running traces.
-        */
-
-        debugfs_remove(parent);
         return 0;
 }
 
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 1993b7186cdb..8c804e24f96f 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2222,7 +2222,11 @@ ftrace_regex_write(struct file *file, const char __user *ubuf,
         read++;
         cnt--;
 
-        if (!(iter->flags & ~FTRACE_ITER_CONT)) {
+        /*
+         * If the parser haven't finished with the last write,
+         * continue reading the user input without skipping spaces.
+         */
+        if (!(iter->flags & FTRACE_ITER_CONT)) {
                 /* skip white space */
                 while (cnt && isspace(ch)) {
                         ret = get_user(ch, ubuf++);
@@ -2232,8 +2236,9 @@ ftrace_regex_write(struct file *file, const char __user *ubuf,
                         cnt--;
                 }
 
+                /* only spaces were written */
                 if (isspace(ch)) {
-                        file->f_pos += read;
+                        *ppos += read;
                         ret = read;
                         goto out;
                 }
@@ -2262,12 +2267,12 @@ ftrace_regex_write(struct file *file, const char __user *ubuf,
                 if (ret)
                         goto out;
                 iter->buffer_idx = 0;
-        } else
+        } else {
                 iter->flags |= FTRACE_ITER_CONT;
+                iter->buffer[iter->buffer_idx++] = ch;
+        }
 
-
-        file->f_pos += read;
-
+        *ppos += read;
         ret = read;
  out:
         mutex_unlock(&ftrace_regex_lock);
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 6df9861fde6b..5c75deeefe30 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3901,17 +3901,9 @@ trace_options_core_write(struct file *filp, const char __user *ubuf, size_t cnt,
         if (ret < 0)
                 return ret;
 
-        switch (val) {
-        case 0:
-                trace_flags &= ~(1 << index);
-                break;
-        case 1:
-                trace_flags |= 1 << index;
-                break;
-
-        default:
+        if (val != 0 && val != 1)
                 return -EINVAL;
-        }
+        set_tracer_flags(1 << index, val);
 
         *ppos += cnt;