diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-07 21:05:19 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2012-03-13 20:09:07 -0400 |
| commit | a3d395f22e38f196a5b385c6b78412f70c6c9457 (patch) | |
| tree | 5164b047503d193ec003ac4c89fcf33377a73143 | |
| parent | 411f86cee11df7b29046af03ce1458302b362856 (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 c56378185807..3270cdedfecb 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(); } /* |