diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-07 21:05:19 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@rostedt.homelinux.com> | 2012-10-26 14:31:52 -0400 |
| commit | 60e46639b6f79373aef59b4a9a883e99310f61a8 (patch) | |
| tree | 95b0c154e8707c2afd36a02741b54405ead33266 | |
| parent | c6872a70f1d48523e60c7d79ed49737194857d3e (diff) | |
fs: namespace: Use cpu_chill() instead of cpu_relax()
Retry loops on RT might loop forever when the modifying side was
preempted. Use cpu_chill() instead of cpu_relax() to let the system
make progress.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable-rt@vger.kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| -rw-r--r-- | fs/namespace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c index 72c9f247f020..84852cd61ed5 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -31,6 +31,7 @@ #include <linux/idr.h> #include <linux/fs_struct.h> #include <linux/fsnotify.h> +#include <linux/delay.h> #include <asm/uaccess.h> #include <asm/unistd.h> #include "pnode.h" @@ -346,7 +347,7 @@ int mnt_want_write(struct vfsmount *mnt) */ while (mnt->mnt_flags & MNT_WRITE_HOLD) { preempt_enable(); - cpu_relax(); + cpu_chill(); preempt_disable(); } /* |