[lkml]   [2010]   [May]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
Patch in this message
SubjectRe: linux-next: build failure after merge of the driver-core tree

Greg this fixes the conflict with the vfs tree we see in linux-next.

Al I will be happy to work with you to rework this hunk of code in the
next cycle so you can kill sb_lock. It is just too late in the cycle
to be making more than the minimal change necessary.


From: Eric W. Biederman <>
Date: Tue, 18 May 2010 12:24:26 -0700
Subject: [PATCH] sysfs: Remove usage of S_BIAS to avoid merge conflict with the vfs tree

In Al's latest vfs tree the code is reworked and S_BIAS has been removed.

It turns out that checking to see if a super block is in the
middle of an unmount in sysfs_exit_ns is unnecessary because we
remove the super_block from the s_supers/s_instances list before
struct sysfs_super_info pointed to by sb->s_fs_info is freed.

For now just delete the unnecessary check to see if a superblock is in the
middle of an unmount, it isn't necessary with or without Al's changes
and it just causes a needless conflict.

Reported-by: Stephen Rothwell <>
Signed-off-by: Eric W. Biederman <>
fs/sysfs/mount.c | 11 ++++++++---
1 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index bbba090..74f0529 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -144,6 +144,9 @@ static void sysfs_kill_sb(struct super_block *sb)
struct sysfs_super_info *info = sysfs_info(sb);

+ /* Remove the superblock from fs_supers/s_instances
+ * so we can't find it, before freeing sysfs_super_info.
+ */
@@ -162,9 +165,11 @@ void sysfs_exit_ns(enum kobj_ns_type type, const void *ns)
list_for_each_entry(sb, &sysfs_fs_type.fs_supers, s_instances) {
struct sysfs_super_info *info = sysfs_info(sb);
- /* Ignore superblocks that are in the process of unmounting */
- if (sb->s_count <= S_BIAS)
- continue;
+ /*
+ * If we see a superblock on the fs_supers/s_instances
+ * list the unmount has not completed and sb->s_fs_info
+ * points to a valid struct sysfs_super_info.
+ */
/* Ignore superblocks with the wrong ns */
if (info->ns[type] != ns)

 \ /
  Last update: 2010-05-18 22:01    [W:0.054 / U:3.520 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site