| From 6772ca45ec38d1bb90b6071a3df1d8b0a7ab1f27 Mon Sep 17 00:00:00 2001 |
| From: Ingo Molnar <mingo@elte.hu> |
| Date: Fri, 3 Jul 2009 08:30:28 -0500 |
| Subject: [PATCH] fs: btrfs locking workaround for preempt -rt |
| |
| commit 6772ca45ec38d1bb90b6071a3df1d8b0a7ab1f27 in tip. |
| |
| - btrfs_path_lock_waiting() looks rather dubious and there's no |
| spin_is_contended() method on PREEMPT_RT - so exclude this for now |
| |
| => needs a proper fix later. Either this code gets zapped from btrfs |
| upstream, or we add spin_is_contended() to PREEMPT_RT too. |
| |
| Signed-off-by: Ingo Molnar <mingo@elte.hu> |
| Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
| |
| diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c |
| index 1c36e5c..4b3d18a 100644 |
| --- a/fs/btrfs/locking.c |
| +++ b/fs/btrfs/locking.c |
| @@ -94,6 +94,7 @@ static int btrfs_spin_on_block(struct extent_buffer *eb) |
| */ |
| int btrfs_try_spin_lock(struct extent_buffer *eb) |
| { |
| +#ifndef CONFIG_PREEMPT_RT |
| int i; |
| |
| if (btrfs_spin_on_block(eb)) { |
| @@ -113,6 +114,7 @@ int btrfs_try_spin_lock(struct extent_buffer *eb) |
| return 1; |
| spin_unlock(&eb->lock); |
| } |
| +#endif |
| return 0; |
| } |
| |
| -- |
| 1.7.1.1 |
| |
