diff options
| author | John Stultz <[email protected]> | 2013-10-07 22:51:59 +0000 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2013-11-06 11:40:26 +0000 |
| commit | 1ca7d67cf5d5a2aef26a8d9afd789006fa098347 (patch) | |
| tree | 8f4f7d1f189d7a08983ab5ef522330f08f337459 /fs/fs_struct.c | |
| parent | net: Explicitly initialize u64_stats_sync structures for lockdep (diff) | |
| download | kernel-1ca7d67cf5d5a2aef26a8d9afd789006fa098347.tar.gz kernel-1ca7d67cf5d5a2aef26a8d9afd789006fa098347.zip | |
seqcount: Add lockdep functionality to seqcount/seqlock structures
Currently seqlocks and seqcounts don't support lockdep.
After running across a seqcount related deadlock in the timekeeping
code, I used a less-refined and more focused variant of this patch
to narrow down the cause of the issue.
This is a first-pass attempt to properly enable lockdep functionality
on seqlocks and seqcounts.
Since seqcounts are used in the vdso gettimeofday code, I've provided
non-lockdep accessors for those needs.
I've also handled one case where there were nested seqlock writers
and there may be more edge cases.
Comments and feedback would be appreciated!
Signed-off-by: John Stultz <[email protected]>
Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Li Zefan <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Steven Rostedt <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: [email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
Diffstat (limited to 'fs/fs_struct.c')
| -rw-r--r-- | fs/fs_struct.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/fs_struct.c b/fs/fs_struct.c index d8ac61d0c932..7dca743b2ce1 100644 --- a/fs/fs_struct.c +++ b/fs/fs_struct.c @@ -161,6 +161,6 @@ EXPORT_SYMBOL(current_umask); struct fs_struct init_fs = { .users = 1, .lock = __SPIN_LOCK_UNLOCKED(init_fs.lock), - .seq = SEQCNT_ZERO, + .seq = SEQCNT_ZERO(init_fs.seq), .umask = 0022, }; |