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| author | Dipankar Sarma <dipankar@in.ibm.com> | 2005-09-09 13:04:14 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 13:57:55 -0700 |
| commit | b835996f628eadb55c5fb222ba46fe9395bf73c7 (patch) | |
| tree | d63d80585d197e1ffc299af4a0034049790fb197 /fs/fcntl.c | |
| parent | ab2af1f5005069321c5d130f09cce577b03f43ef (diff) | |
| download | lwn-b835996f628eadb55c5fb222ba46fe9395bf73c7.tar.gz lwn-b835996f628eadb55c5fb222ba46fe9395bf73c7.zip | |
[PATCH] files: lock-free fd look-up
With the use of RCU in files structure, the look-up of files using fds can now
be lock-free. The lookup is protected by rcu_read_lock()/rcu_read_unlock().
This patch changes the readers to use lock-free lookup.
Signed-off-by: Maneesh Soni <maneesh@in.ibm.com>
Signed-off-by: Ravikiran Thirumalai <kiran_th@gmail.com>
Signed-off-by: Dipankar Sarma <dipankar@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/fcntl.c')
| -rw-r--r-- | fs/fcntl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/fcntl.c b/fs/fcntl.c index d2f3ed8acd93..863b46e0d78a 100644 --- a/fs/fcntl.c +++ b/fs/fcntl.c @@ -40,10 +40,10 @@ static inline int get_close_on_exec(unsigned int fd) struct files_struct *files = current->files; struct fdtable *fdt; int res; - spin_lock(&files->file_lock); + rcu_read_lock(); fdt = files_fdtable(files); res = FD_ISSET(fd, fdt->close_on_exec); - spin_unlock(&files->file_lock); + rcu_read_unlock(); return res; } |