diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2012-03-07 21:05:19 +0100 |
|---|---|---|
| committer | Clark Williams <williams@redhat.com> | 2012-03-07 16:15:18 -0600 |
| commit | 0a466c6154c14150a1b2d42612a1c8a8e9a639de (patch) | |
| tree | 2ecf354ddfd72d9b57408e443505b3fd1f62b7ba | |
| parent | e9e64e3ff60663b9b1ba918707e9eed1ef7cea56 (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
| -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 14011423e91c..32a2f6208b70 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(); } /* |